- 28 Apr, 2017 7 commits
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Jack Morgenstein authored
commit 291c566a upstream. In function mlx4_cq_completion() and mlx4_cq_event(), the radix_tree_lookup requires a rcu_read_lock. This is mandatory: if another core frees the CQ, it could run the radix_tree_node_rcu_free() call_rcu() callback while its being used by the radix tree lookup function. Additionally, in function mlx4_cq_event(), since we are adding the rcu lock around the radix-tree lookup, we no longer need to take the spinlock. Also, the synchronize_irq() call for the async event eliminates the need for incrementing the cq reference count in mlx4_cq_event(). Other changes: 1. In function mlx4_cq_free(), replace spin_lock_irq with spin_lock: we no longer take this spinlock in the interrupt context. The spinlock here, therefore, simply protects against different threads simultaneously invoking mlx4_cq_free() for different cq's. 2. In function mlx4_cq_free(), we move the radix tree delete to before the synchronize_irq() calls. This guarantees that we will not access this cq during any subsequent interrupts, and therefore can safely free the CQ after the synchronize_irq calls. The rcu_read_lock in the interrupt handlers only needs to protect against corrupting the radix tree; the interrupt handlers may access the cq outside the rcu_read_lock due to the synchronize_irq calls which protect against premature freeing of the cq. 3. In function mlx4_cq_event(), we change the mlx_warn message to mlx4_dbg. 4. We leave the cq reference count mechanism in place, because it is still needed for the cq completion tasklet mechanism. Fixes: 6d90aa5c ("net/mlx4_core: Make sure there are no pending async events when freeing CQ") Fixes: 225c7b1f ("IB/mlx4: Add a driver Mellanox ConnectX InfiniBand adapters") Signed-off-by:
Jack Morgenstein <jackm@dev.mellanox.co.il> Signed-off-by:
Matan Barak <matanb@mellanox.com> Signed-off-by:
Tariq Toukan <tariqt@mellanox.com> Signed-off-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
Sumit Semwal <sumit.semwal@linaro.org> Signed-off-by:
Jiri Slaby <jslaby@suse.cz>
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Eugenia Emantayev authored
commit 6496bbf0 upstream. Single send WQE in RX buffer should be stamped with software ownership in order to prevent the flow of QP in error in FW once UPDATE_QP is called. Fixes: 9f519f68 ('mlx4_en: Not using Shared Receive Queues') Signed-off-by:
Eugenia Emantayev <eugenia@mellanox.com> Signed-off-by:
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Guenter Roeck authored
commit 22547c4c upstream. On a system with a defective USB device connected to an USB hub, an endless sequence of port connect events was observed. The sequence of events as observed is as follows: - Port reports connected event (port status=USB_PORT_STAT_CONNECTION). - Event handler debounces port and resets it by calling hub_port_reset(). - hub_port_reset() calls hub_port_wait_reset() to wait for the reset to complete. - The reset completes, but USB_PORT_STAT_CONNECTION is not immediately set in the port status register. - hub_port_wait_reset() returns -ENOTCONN. - Port initialization sequence is aborted. - A few milliseconds later, the port again reports a connected event, and the sequence repeats. This continues either forever or, randomly, stops if the connection is already re-established when the port status is read. It results in a high rate of udev events. This in turn destabilizes userspace since the above sequence holds the device mutex pretty much continuously and prevents userspace from actually reading the device status. To prevent the problem from happening, let's wait for the connection to be re-established after a port reset. If the device was actually disconnected, the code will still return an error, but it will do so only after the long reset timeout. Cc: Douglas Anderson <dianders@chromium.org> Signed-off-by:
Guenter Roeck <linux@roeck-us.net> Acked-by:
Alan Stern <stern@rowland.harvard.edu> Signed-off-by:
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Andrey Konovalov authored
commit 2b6867c2 upstream. Subtracting tp_sizeof_priv from tp_block_size and casting to int to check whether one is less then the other doesn't always work (both of them are unsigned ints). Compare them as is instead. Also cast tp_sizeof_priv to u64 before using BLK_PLUS_PRIV, as it can overflow inside BLK_PLUS_PRIV otherwise. Signed-off-by:
Andrey Konovalov <andreyknvl@google.com> Acked-by:
Eric Dumazet <edumazet@google.com> Signed-off-by:
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Rafał Miłecki authored
commit bd5d2131 upstream. After parsing TRX we should skip to the first block placed behind it. Our code was working only with TRX with length not aligned to the blocksize. In other cases (length aligned) it was missing the block places right after TRX. This fixes calculation and simplifies the comment. Signed-off-by:
Rafał Miłecki <rafal@milecki.pl> Signed-off-by:
Brian Norris <computersforpeace@gmail.com> Signed-off-by:
Amit Pundir <amit.pundir@linaro.org> Signed-off-by:
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Janusz Dziedzic authored
commit de288e36 upstream. In the case of bounced ep0 requests, we must delay DMA operation until after ->complete() otherwise we might overwrite contents of req->buf. This caused problems with RNDIS gadget. Signed-off-by:
Janusz Dziedzic <januszx.dziedzic@intel.com> Signed-off-by:
Felipe Balbi <felipe.balbi@linux.intel.com> Signed-off-by:
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Chris Salls authored
commit cf01fb99 upstream. In the case that compat_get_bitmap fails we do not want to copy the bitmap to the user as it will contain uninitialized stack data and leak sensitive data. Signed-off-by:
Chris Salls <salls@cs.ucsb.edu> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by:
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- 27 Apr, 2017 2 commits
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Marcelo Henrique Cerri authored
commit d82c0d12 upstream. Reorder the operations in decompress_kernel() to ensure initrd is moved to a safe location before the bss section is zeroed. During decompression bss can overlap with the initrd and this can corrupt the initrd contents depending on the size of the compressed kernel (which affects where the initrd is placed by the bootloader) and the size of the bss section of the decompressor. Also use the correct initrd size when checking for overlaps with parmblock. Fixes: 06c0dd72 ([S390] fix boot failures with compressed kernels) Reviewed-by:
Joy Latten <joy.latten@canonical.com> Reviewed-by:
Vineetha HariPai <vineetha.hari.pai@canonical.com> Signed-off-by:
Marcelo Henrique Cerri <marcelo.cerri@canonical.com> Signed-off-by:
Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by:
Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by:
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Paul Mackerras authored
commit 48fe9e94 upstream. In the past, there was only one load-with-reservation instruction, lwarx, and if a program attempted a lwarx on a misaligned address, it would take an alignment interrupt and the kernel handler would emulate it as though it was lwzx, which was not really correct, but benign since it is loading the right amount of data, and the lwarx should be paired with a stwcx. to the same address, which would also cause an alignment interrupt which would result in a SIGBUS being delivered to the process. We now have 5 different sizes of load-with-reservation instruction. Of those, lharx and ldarx cause an immediate SIGBUS by luck since their entries in aligninfo[] overlap instructions which were not fixed up, but lqarx overlaps with lhz and will be emulated as such. lbarx can never generate an alignment interrupt since it only operates on 1 byte. To straighten this out and fix the lqarx case, this adds code to detect the l[hwdq]arx instructions and return without fixing them up, resulting in a SIGBUS being delivered to the process. [js] include disassemble.h in 3.12 Signed-off-by:
Paul Mackerras <paulus@ozlabs.org> Signed-off-by:
Michael Ellerman <mpe@ellerman.id.au> Signed-off-by:
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- 26 Apr, 2017 14 commits
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James Hogan authored
commit b884a190 upstream. The rapf copy loops in the Meta usercopy code is missing some extable entries for HTP cores with unaligned access checking enabled, where faults occur on the instruction immediately after the faulting access. Add the fixup labels and extable entries for these cases so that corner case user copy failures don't cause kernel crashes. Fixes: 373cd784 ("metag: Memory handling") Signed-off-by:
James Hogan <james.hogan@imgtec.com> Cc: linux-metag@vger.kernel.org Signed-off-by:
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James Hogan authored
commit 2c0b1df8 upstream. The fixup code to rewind the source pointer in __asm_copy_from_user_{32,64}bit_rapf_loop() always rewound the source by a single unit (4 or 8 bytes), however this is insufficient if the fault didn't occur on the first load in the loop, as the source pointer will have been incremented but nothing will have been stored until all 4 register [pairs] are loaded. Read the LSM_STEP field of TXSTATUS (which is already loaded into a register), a bit like the copy_to_user versions, to determine how many iterations of MGET[DL] have taken place, all of which need rewinding. Fixes: 373cd784 ("metag: Memory handling") Signed-off-by:
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James Hogan authored
commit fd40eee1 upstream. The fixup code for the copy_to_user rapf loops reads TXStatus.LSM_STEP to decide how far to rewind the source pointer. There is a special case for the last execution of an MGETL/MGETD, since it leaves LSM_STEP=0 even though the number of MGETLs/MGETDs attempted was 4. This uses ADDZ which is conditional upon the Z condition flag, but the AND instruction which masked the TXStatus.LSM_STEP field didn't set the condition flags based on the result. Fix that now by using ANDS which does set the flags, and also marking the condition codes as clobbered by the inline assembly. Fixes: 373cd784 ("metag: Memory handling") Signed-off-by:
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James Hogan authored
commit 563ddc10 upstream. Currently we try to zero the destination for a failed read from userland in fixup code in the usercopy.c macros. The rest of the destination buffer is then zeroed from __copy_user_zeroing(), which is used for both copy_from_user() and __copy_from_user(). Unfortunately we fail to zero in the fixup code as D1Ar1 is set to 0 before the fixup code entry labels, and __copy_from_user() shouldn't even be zeroing the rest of the buffer. Move the zeroing out into copy_from_user() and rename __copy_user_zeroing() to raw_copy_from_user() since it no longer does any zeroing. This also conveniently matches the name needed for RAW_COPY_USER support in a later patch. Fixes: 373cd784 ("metag: Memory handling") Reported-by:
Al Viro <viro@zeniv.linux.org.uk> Signed-off-by:
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James Hogan authored
commit fb8ea062 upstream. When copying to userland on Meta, if any faults are encountered immediately abort the copy instead of continuing on and repeatedly faulting, and worse potentially copying further bytes successfully to subsequent valid pages. Fixes: 373cd784 ("metag: Memory handling") Reported-by:
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James Hogan authored
commit 22572119 upstream. Fix the error checking of the alignment adjustment code in raw_copy_from_user(), which mistakenly considers it safe to skip the error check when aligning the source buffer on a 2 or 4 byte boundary. If the destination buffer was unaligned it may have started to copy using byte or word accesses, which could well be at the start of a new (valid) source page. This would result in it appearing to have copied 1 or 2 bytes at the end of the first (invalid) page rather than none at all. Fixes: 373cd784 ("metag: Memory handling") Signed-off-by:
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James Hogan authored
commit ef62a2d8 upstream. Metag's lib/usercopy.c has a bunch of copy_from_user macros for larger copies between 5 and 16 bytes which are completely unused. Before fixing zeroing lets drop these macros so there is less to fix. Signed-off-by:
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Wei Yongjun authored
commit 62277de7 upstream. In case of error, the function kthread_run() returns ERR_PTR() and never returns NULL. The NULL test in the return value check should be replaced with IS_ERR(). Link: http://lkml.kernel.org/r/1466184839-14927-1-git-send-email-weiyj_lk@163.com Fixes: 6c43e554 ("ring-buffer: Add ring buffer startup selftest") Signed-off-by:
Wei Yongjun <yongjun_wei@trendmicro.com.cn> Signed-off-by:
Steven Rostedt (VMware) <rostedt@goodmis.org> Signed-off-by:
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bsegall@google.com authored
commit 5402e97a upstream. In PT_SEIZED + LISTEN mode STOP/CONT signals cause a wakeup against __TASK_TRACED. If this races with the ptrace_unfreeze_traced at the end of a PTRACE_LISTEN, this can wake the task /after/ the check against __TASK_TRACED, but before the reset of state to TASK_TRACED. This causes it to instead clobber TASK_WAKING, allowing a subsequent wakeup against TRACED while the task is still on the rq wake_list, corrupting it. Oleg said: "The kernel can crash or this can lead to other hard-to-debug problems. In short, "task->state = TASK_TRACED" in ptrace_unfreeze_traced() assumes that nobody else can wake it up, but PTRACE_LISTEN breaks the contract. Obviusly it is very wrong to manipulate task->state if this task is already running, or WAKING, or it sleeps again" [akpm@linux-foundation.org: coding-style fixes] Fixes: 9899d11f ("ptrace: ensure arch_ptrace/ptrace_request can never race with SIGKILL") Link: http://lkml.kernel.org/r/xm26y3vfhmkp.fsf_-_@bsegall-linux.mtv.corp.google.comSigned-off-by:
Ben Segall <bsegall@google.com> Acked-by:
Oleg Nesterov <oleg@redhat.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
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Jan-Marek Glogowski authored
commit 806a28ef upstream. Currently the cifs module breaks the CIFS specs on reconnect as described in http://msdn.microsoft.com/en-us/library/cc246529.aspx: "TreeId (4 bytes): Uniquely identifies the tree connect for the command. This MUST be 0 for the SMB2 TREE_CONNECT Request." Signed-off-by:
Jan-Marek Glogowski <glogow@fbihome.de> Reviewed-by:
Aurelien Aptel <aaptel@suse.com> Tested-by:
Steve French <smfrench@gmail.com> Signed-off-by:
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Li Qiang authored
commit e7e11f99 upstream. In vmw_surface_define_ioctl(), the 'num_sizes' is the sum of the 'req->mip_levels' array. This array can be assigned any value from the user space. As both the 'num_sizes' and the array is uint32_t, it is easy to make 'num_sizes' overflow. The later 'mip_levels' is used as the loop count. This can lead an oob write. Add the check of 'req->mip_levels' to avoid this. Signed-off-by:
Li Qiang <liqiang6-s@360.cn> Reviewed-by:
Thomas Hellstrom <thellstrom@vmware.com> Signed-off-by:
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Thomas Hellstrom authored
commit 53e16798 upstream. The mesa winsys sometimes uses unimplemented parameter requests to check for features. Remove the error message to avoid bloating the kernel log. Signed-off-by:
Brian Paul <brianp@vmware.com> Reviewed-by:
Sinclair Yeh <syeh@vmware.com> Signed-off-by:
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Murray McAllister authored
commit 63774069 upstream. In vmw_get_cap_3d_ioctl(), a user can supply 0 for a size that is used in vzalloc(). This eventually calls dump_stack() (in warn_alloc()), which can leak useful addresses to dmesg. Add check to avoid a size of 0. Signed-off-by:
Murray McAllister <murray.mcallister@insomniasec.com> Reviewed-by:
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Murray McAllister authored
commit 36274ab8 upstream. Before memory allocations vmw_surface_define_ioctl() checks the upper-bounds of a user-supplied size, but does not check if the supplied size is 0. Add check to avoid NULL pointer dereferences. Signed-off-by:
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- 11 Apr, 2017 16 commits
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Jiri Slaby authored
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Richard Genoud authored
commit 31ca2c63 upstream. If uart_flush_buffer() is called between atmel_tx_dma() and atmel_complete_tx_dma(), the circular buffer has been cleared, but not atmel_port->tx_len. That leads to a circular buffer overflow (dumping (UART_XMIT_SIZE - atmel_port->tx_len) bytes). Tested-by:
Nicolas Ferre <nicolas.ferre@microchip.com> [rg] backport to 3.12 Signed-off-by:
Richard Genoud <richard.genoud@gmail.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by:
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Akinobu Mita authored
commit 9723ddc8 upstream. This driver reports misc scan input events on the sensor's status register changes. But the event capability for them was not set in the device initialization, so these events were ignored. This change adds the missing event capability. Signed-off-by:
Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by:
Dmitry Torokhov <dmitry.torokhov@gmail.com> Cc: Oliver Neukum <ONeukum@suse.com> Signed-off-by:
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Akinobu Mita authored
commit 08fea55e upstream. This driver reports input events on their interrupts which are triggered by the sensor's status register changes. But only single bit change is reported in the interrupt handler. So if there are multiple bits are changed at almost the same time, other press or release events are ignored. This fixes it by detecting all changed bits in the status register. Signed-off-by:
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Maxime Ripard authored
commit 259b77ef upstream. The TCA8418 might be used using different interrupt triggers on various boards. This is not working so far because the current code forces a falling edge trigger. The device tree already provides a trigger type, so let's use whatever it sets up, and since we can be loaded without DT, keep the old behaviour for the non-DT case. Signed-off-by:
Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by:
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Raphael Assenat authored
commit 45536d37 upstream. Postpone axis initialization to the first open instead of doing it in joydev_connect. This is to make sure the generated startup events are representative of the current joystick state rather than what it was when joydev_connect() was called, potentially much earlier. Once the first user is connected to joydev node we'll be updating joydev->abs[] values and subsequent clients will be getting correct initial states as well. This solves issues with joystick driven menus that start scrolling up each time they are started, until the user moves the joystick to generate events. In emulator menu setups where the menu program is restarted every time the game exits, the repeated need to move the joystick to stop the unintended scrolling gets old rather quickly... Signed-off-by:
Raphael Assenat <raph@raphnet.net> Signed-off-by:
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Brendan McGrath authored
commit a89af4ab upstream. Support for the Asus Touchpad was recently added. It turns out this device can fail initialisation (and become unusable) when the RESET command is sent too soon after the POWER ON command. Unfortunately the i2c-hid specification does not specify the need for a delay between these two commands. But it was discovered the Windows driver has a 1ms delay. As a result, this patch modifies the i2c-hid module to add a sleep inbetween the POWER ON and RESET commands which lasts between 1ms and 5ms. See https://github.com/vlasenko/hid-asus-dkms/issues/24 for further details. Signed-off-by:
Brendan McGrath <redmcg@redmandi.dyndns.org> Reviewed-by:
Benjamin Tissoires <benjamin.tissoires@redhat.com> Signed-off-by:
Jiri Kosina <jkosina@suse.cz> Signed-off-by:
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Colin Ian King authored
commit ed9ab428 upstream. Quirking the following AMI USB device with ALWAYS_POLL fixes an AMI virtual keyboard and mouse from not responding and timing out when it is attached to a ppc64el Power 8 system and when we have some rapid open/closes on the mouse device. usb 1-3: new high-speed USB device number 2 using xhci_hcd usb 1-3: New USB device found, idVendor=046b, idProduct=ff01 usb 1-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3 usb 1-3: Product: Virtual Hub usb 1-3: Manufacturer: American Megatrends Inc. usb 1-3: SerialNumber: serial usb 1-3.3: new high-speed USB device number 3 using xhci_hcd usb 1-3.3: New USB device found, idVendor=046b, idProduct=ff31 usb 1-3.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3 usb 1-3.3: Product: Virtual HardDisk Device usb 1-3.3: Manufacturer: American Megatrends Inc. usb 1-3.4: new low-speed USB device number 4 using xhci_hcd usb 1-3.4: New USB device found, idVendor=046b, idProduct=ff10 usb 1-3.4: New USB device strings: Mfr=1, Product=2, SerialNumber=0 usb 1-3.4: Product: Virtual Keyboard and Mouse usb 1-3.4: Manufacturer: American Megatrends Inc. With the quirk I have not been able to trigger the issue with half an hour of saturation soak testing. Signed-off-by:
Colin Ian King <colin.king@canonical.com> Signed-off-by:
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Ardinartsev Nikita authored
commit 877a021e upstream. With NOGET quirk Logitech F510 is now fully workable in dinput mode including rumble effects (according to fftest). Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=117091 [jkosina@suse.cz: fix patch format] Signed-off-by:
Ardinartsev Nikita <ardinar23@gmail.com> Acked-by:
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Andrew Lunn authored
commit 4eba7bb1 upstream. When a multicast group is joined on a socket, a struct ip_mc_socklist is appended to the sockets mc_list containing information about the joined group. If the interface is hot unplugged, this entry becomes stale. Prior to commit 52ad353a ("igmp: fix the problem when mc leave group") it was possible to remove the stale entry by performing a IP_DROP_MEMBERSHIP, passing either the old ifindex or ip address on the interface. However, this fix enforces that the interface must still exist. Thus with time, the number of stale entries grows, until sysctl_igmp_max_memberships is reached and then it is not possible to join and more groups. The previous patch fixes an issue where a IP_DROP_MEMBERSHIP is performed without specifying the interface, either by ifindex or ip address. However here we do supply one of these. So loosen the restriction on device existence to only apply when the interface has not been specified. This then restores the ability to clean up the stale entries. Signed-off-by:
Andrew Lunn <andrew@lunn.ch> Fixes: 52ad353a "(igmp: fix the problem when mc leave group") Signed-off-by:
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Ludovic Desroches authored
commit a9bed6b1 upstream. In some cases, we could start a new i2c transfer with the RXRDY flag set. It is not a clean state and it leads to print annoying error messages even if there no real issue. The cause is only having garbage data in the Receive Holding Register because of a weird behavior of the RXRDY flag. Reported-by:
Peter Rosin <peda@lysator.liu.se> Signed-off-by:
Ludovic Desroches <ludovic.desroches@atmel.com> Tested-by:
Wolfram Sang <wsa@the-dreams.de> Fixes: 93563a6a ("i2c: at91: fix a race condition when using the DMA controller") Signed-off-by:
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Alan Stern authored
commit 7d8021c9 upstream. This patch fixes a bug introduced by commit 977dcfdc ("USB: OHCI: don't lose track of EDs when a controller dies"). The commit changed ed_state from ED_UNLINK to ED_IDLE too early, before finish_urb() had been called. The user-visible consequence is that the driver occasionally crashes or locks up when an URB is submitted while another URB for the same endpoint is being unlinked. This patch moves the ED state change later, to the right place. The drawback is that now we may unnecessarily execute some instructions multiple times when a controller dies. Since controllers dying is an exceptional occurrence, a little wasted time won't matter. Signed-off-by:
Heiko Przybyl <lil_tux@web.de> Tested-by:
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Rafael J. Wysocki authored
commit 0294112e upstream. This effectively reverts the following three commits: 7bc10388 ACPI / resources: free memory on error in add_region_before() 0f1b414d ACPI / PNP: Avoid conflicting resource reservations b9a5e5e1 ACPI / init: Fix the ordering of acpi_reserve_resources() (commit b9a5e5e1 introduced regressions some of which, but not all, were addressed by commit 0f1b414d and commit 7bc10388 was a fixup on top of the latter) and causes ACPI fixed hardware resources to be reserved at the fs_initcall_sync stage of system initialization. The story is as follows. First, a boot regression was reported due to an apparent resource reservation ordering change after a commit that shouldn't lead to such changes. Investigation led to the conclusion that the problem happened because acpi_reserve_resources() was executed at the device_initcall() stage of system initialization which wasn't strictly ordered with respect to driver initialization (and with respect to the initialization of the pcieport driver in particular), so a random change causing the device initcalls to be run in a different order might break things. The response to that was to attempt to run acpi_reserve_resources() as soon as we knew that ACPI would be in use (commit b9a5e5e1). However, that turned out to be too early, because it caused resource reservations made by the PNP system driver to fail on at least one system and that failure was addressed by commit 0f1b414d. That fix still turned out to be insufficient, though, because calling acpi_reserve_resources() before the fs_initcall stage of system initialization caused a boot regression to happen on the eCAFE EC-800-H20G/S netbook. That meant that we only could call acpi_reserve_resources() at the fs_initcall initialization stage or later, but then we might just as well call it after the PNP initalization in which case commit 0f1b414d wouldn't be necessary any more. For this reason, the changes made by commit 0f1b414d are reverted (along with a memory leak fixup on top of that commit), the changes made by commit b9a5e5e1 that went too far are reverted too and acpi_reserve_resources() is changed into fs_initcall_sync, which will cause it to be executed after the PNP subsystem initialization (which is an fs_initcall) and before device initcalls (including the pcieport driver initialization) which should avoid the initial issue. Link: https://bugzilla.kernel.org/show_bug.cgi?id=100581 Link: http://marc.info/?t=143092384600002&r=1&w=2 Link: https://bugzilla.kernel.org/show_bug.cgi?id=99831 Link: http://marc.info/?t=143389402600001&r=1&w=2 Fixes: b9a5e5e1 "ACPI / init: Fix the ordering of acpi_reserve_resources()" Reported-by:
Roland Dreier <roland@purestorage.com> Signed-off-by:
Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by:
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Dan Carpenter authored
commit 7bc10388 upstream. There is a small memory leak on error. Fixes: 0f1b414d (ACPI / PNP: Avoid conflicting resource reservations) Signed-off-by:
Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by:
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Rafael J. Wysocki authored
commit 0f1b414d upstream. Commit b9a5e5e1 "ACPI / init: Fix the ordering of acpi_reserve_resources()" overlooked the fact that the memory and/or I/O regions reserved by acpi_reserve_resources() may conflict with those reserved by the PNP "system" driver. If that conflict actually takes place, it causes the reservations made by the "system" driver to fail while before commit b9a5e5e1 all reservations made by it and by acpi_reserve_resources() would be successful. In turn, that allows the resources that haven't been reserved by the "system" driver to be used by others (e.g. PCI) which sometimes leads to functional problems (up to and including boot failures). To fix that issue, introduce a common resource reservation routine, acpi_reserve_region(), to be used by both acpi_reserve_resources() and the "system" driver, that will track all resources reserved by it and avoid making conflicting requests. Link: https://bugzilla.kernel.org/show_bug.cgi?id=99831 Link: http://marc.info/?t=143389402600001&r=1&w=2 Fixes: b9a5e5e1 "ACPI / init: Fix the ordering of acpi_reserve_resources()" Reported-by:
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Viresh Kumar authored
commit 92c14bd9 upstream. This is only relevant to implementations with multiple clusters, where clusters have separate clock lines but all CPUs within a cluster share it. Consider a dual cluster platform with 2 cores per cluster. During suspend we start hot unplugging CPUs in order 1 to 3. When CPU2 is removed, policy->kobj would be moved to CPU3 and when CPU3 goes down we wouldn't free policy or its kobj as we want to retain permissions/values/etc. Now on resume, we will get CPU2 before CPU3 and will call __cpufreq_add_dev(). We will recover the old policy and update policy->cpu from 3 to 2 from update_policy_cpu(). But the kobj is still tied to CPU3 and isn't moved to CPU2. We wouldn't create a link for CPU2, but would try that for CPU3 while bringing it online. Which will report errors as CPU3 already has kobj assigned to it. This bug got introduced with commit 42f921a6, which overlooked this scenario. To fix this, lets move kobj to the new policy->cpu while bringing first CPU of a cluster back. Also do a WARN_ON() if kobject_move failed, as we would reach here only for the first CPU of a non-boot cluster. And we can't recover from this situation, if kobject_move() fails. Fixes: 42f921a6 (cpufreq: remove sysfs files for CPUs which failed to come back after resume) Reported-and-tested-by:
Bu Yitian <ybu@qti.qualcomm.com> Reported-by:
Saravana Kannan <skannan@codeaurora.org> Reviewed-by:
Srivatsa S. Bhat <srivatsa@mit.edu> Signed-off-by:
Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by:
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- 10 Apr, 2017 1 commit
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Rafael J. Wysocki authored
commit d4faadd5 upstream. Commit 2167e239 (cpufreq: fix garbage kobjects on errors during suspend/resume) breaks suspend/resume on Martin Ziegler's system (hard lockup during resume), so revert it. Fixes: 2167e239 (cpufreq: fix garbage kobjects on errors during suspend/resume) References: https://bugzilla.kernel.org/show_bug.cgi?id=66751Reported-by:
Martin Ziegler <ziegler@uni-freiburg.de> Signed-off-by:
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