- 28 Jan, 2015 2 commits
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Nicholas Mc Guire authored
Signed-off-by: Nicholas Mc Guire <der.herr@hofr.at> Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller authored
Conflicts: arch/arm/boot/dts/imx6sx-sdb.dts net/sched/cls_bpf.c Two simple sets of overlapping changes. Signed-off-by: David S. Miller <davem@davemloft.net>
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- 27 Jan, 2015 38 commits
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git://git.kernel.org/pub/scm/linux/kernel/git/davem/netLinus Torvalds authored
Pull networking fixes from David Miller: 1) Don't OOPS on socket AIO, from Christoph Hellwig. 2) Scheduled scans should be aborted upon RFKILL, from Emmanuel Grumbach. 3) Fix sleep in atomic context in kvaser_usb, from Ahmed S Darwish. 4) Fix RCU locking across copy_to_user() in bpf code, from Alexei Starovoitov. 5) Lots of crash, memory leak, short TX packet et al bug fixes in sh_eth from Ben Hutchings. 6) Fix memory corruption in SCTP wrt. INIT collitions, from Daniel Borkmann. 7) Fix return value logic for poll handlers in netxen, enic, and bnx2x. From Eric Dumazet and Govindarajulu Varadarajan. 8) Header length calculation fix in mac80211 from Fred Chou. 9) mv643xx_eth doesn't handle highmem correctly in non-TSO code paths. From Ezequiel Garcia. 10) udp_diag has bogus logic in it's hash chain skipping, copy same fix tcp diag used. From Herbert Xu. 11) amd-xgbe programs wrong rx flow control register, from Thomas Lendacky. 12) Fix race leading to use after free in ping receive path, from Subash Abhinov Kasiviswanathan. 13) Cache redirect routes otherwise we can get a heavy backlog of rcu jobs liberating DST_NOCACHE entries. From Hannes Frederic Sowa. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (48 commits) net: don't OOPS on socket aio stmmac: prevent probe drivers to crash kernel bnx2x: fix napi poll return value for repoll ipv6: replacing a rt6_info needs to purge possible propagated rt6_infos too sh_eth: Fix DMA-API usage for RX buffers sh_eth: Check for DMA mapping errors on transmit sh_eth: Ensure DMA engines are stopped before freeing buffers sh_eth: Remove RX overflow log messages ping: Fix race in free in receive path udp_diag: Fix socket skipping within chain can: kvaser_usb: Fix state handling upon BUS_ERROR events can: kvaser_usb: Retry the first bulk transfer on -ETIMEDOUT can: kvaser_usb: Send correct context to URB completion can: kvaser_usb: Do not sleep in atomic context ipv4: try to cache dst_entries which would cause a redirect samples: bpf: relax test_maps check bpf: rcu lock must not be held when calling copy_to_user() net: sctp: fix slab corruption from use after free on INIT collisions net: mv643xx_eth: Fix highmem support in non-TSO egress path sh_eth: Fix serialisation of interrupt disable with interrupt & NAPI handlers ...
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Christoph Hellwig authored
Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: David S. Miller <davem@davemloft.net>
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Andy Shevchenko authored
In the case when alloc_netdev fails we return NULL to a caller. But there is no check for NULL in the probe drivers. This patch changes NULL to an error pointer. The function description is amended to reflect what we may get returned. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linuxLinus Torvalds authored
Pull powerpc fixes from Michael Ellerman: "Two powerpc fixes" * tag 'powerpc-3.19-5' of git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux: powerpc/powernv: Restore LPCR with LPCR_PECE1 cleared powerpc/xmon: Fix another endiannes issue in RTAS call from xmon
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git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linuxLinus Torvalds authored
Pull one more module fix from Rusty Russell: "SCSI was using module_refcount() to figure out when the module was unloading: this broke with new atomic refcounting. The code is still suspicious, but this solves the WARN_ON()" * tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux: scsi: always increment reference count
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Herbert Xu authored
The socket already carries the net namespace with it so there is no need to be passing another net around. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
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Govindarajulu Varadarajan authored
With the commit d75b1ade ("net: less interrupt masking in NAPI") napi repoll is done only when work_done == budget. When in busy_poll is we return 0 in napi_poll. We should return budget. Signed-off-by: Govindarajulu Varadarajan <_govind@gmx.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsecDavid S. Miller authored
Steffen Klassert says: ==================== ipsec 2015-01-26 Just two small fixes for _decode_session6() where we might decode to wrong header information in some rare situations. Please pull or let me know if there are problems. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
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Ben Hutchings authored
It is possible to see the old value of the LP advertising flags through ethtool after reconfiguring the PHY and before autonegotiation completes. If autonegotiation is turned off then the last value seen will persist indefinitely. Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk> Acked-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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David S. Miller authored
David L Stevens says: ==================== sunvnet: fix null pointer deref and crash recovery These patches fix an incorrect ordering in releasing ring data, clear pending tx buffers on a reset, and make the sunvnet driver more reliable when remote systems crash during active transmits. ==================== Acked-by: Sowmini Varadhan <sowmini.varadhan@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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David L Stevens authored
If a remote machine crashes while there are pending transmit buffers, the sunvnet driver reallocates the ring descriptors giving us enries that have state VIO_DESC_FREE but also an allocated skb. This results in a BUG_ON() call when the remote reboots and we reach that point in the ring. This patch: 1) clears pending tx packets in the ring on port reset 2) changes a BUG_ON() to a pr_warn() when a remote host has given us an invalid descriptor state 3) collapses multiple active buffer frees in a ring to a single message per ring and adds the device name and remote MAC address This fixes the particular problem of not cleaning up pending buffers on a reset, but also prevents us from crashing if the remote handles descriptors out of order or sets an unexpected state for a descriptor. Signed-off-by: David L Stevens <david.stevens@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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David L Stevens authored
This patch moves the clearing of ring data in vnet_port_free_tx_bufs to after the freeing of pending buffers in the ring. Otherwise, this can result in dereferencing a NULL pointer. Reported-by: Sowmini Varadhan <sowmini.varadhan@oracle.com> Signed-off-by: David L Stevens <david.stevens@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Hannes Frederic Sowa authored
Lubomir Rintel reported that during replacing a route the interface reference counter isn't correctly decremented. To quote bug <https://bugzilla.kernel.org/show_bug.cgi?id=91941>: | [root@rhel7-5 lkundrak]# sh -x lal | + ip link add dev0 type dummy | + ip link set dev0 up | + ip link add dev1 type dummy | + ip link set dev1 up | + ip addr add 2001:db8:8086::2/64 dev dev0 | + ip route add 2001:db8:8086::/48 dev dev0 proto static metric 20 | + ip route add 2001:db8:8088::/48 dev dev1 proto static metric 10 | + ip route replace 2001:db8:8086::/48 dev dev1 proto static metric 20 | + ip link del dev0 type dummy | Message from syslogd@rhel7-5 at Jan 23 10:54:41 ... | kernel:unregister_netdevice: waiting for dev0 to become free. Usage count = 2 | | Message from syslogd@rhel7-5 at Jan 23 10:54:51 ... | kernel:unregister_netdevice: waiting for dev0 to become free. Usage count = 2 During replacement of a rt6_info we must walk all parent nodes and check if the to be replaced rt6_info got propagated. If so, replace it with an alive one. Fixes: 4a287eba ("IPv6 routing, NLM_F_* flag support: REPLACE and EXCL flags support, warn about missing CREATE flag") Reported-by: Lubomir Rintel <lkundrak@v3.sk> Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Tested-by: Lubomir Rintel <lkundrak@v3.sk> Signed-off-by: David S. Miller <davem@davemloft.net>
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David S. Miller authored
Ben Hutchings says: ==================== Fixes for sh_eth #3 I'm continuing review and testing of Ethernet support on the R-Car H2 chip. This series fixes the last of the more serious issues I've found. These are not tested on any of the other supported chips. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
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Ben Hutchings authored
- Use the return value of dma_map_single(), rather than calling virt_to_page() separately - Check for mapping failue - Call dma_unmap_single() rather than dma_sync_single_for_cpu() Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
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Ben Hutchings authored
dma_map_single() may fail if an IOMMU or swiotlb is in use, so we need to check for this. Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
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Ben Hutchings authored
Currently we try to clear EDRRR and EDTRR and immediately continue to free buffers. This is unsafe because: - In general, register writes are not serialised with DMA, so we still have to wait for DMA to complete somehow - The R8A7790 (R-Car H2) manual states that the TX running flag cannot be cleared by writing to EDTRR - The same manual states that clearing the RX running flag only stops RX DMA at the next packet boundary I applied this patch to the driver to detect DMA writes to freed buffers: > --- a/drivers/net/ethernet/renesas/sh_eth.c > +++ b/drivers/net/ethernet/renesas/sh_eth.c > @@ -1098,7 +1098,14 @@ static void sh_eth_ring_free(struct net_device *ndev) > /* Free Rx skb ringbuffer */ > if (mdp->rx_skbuff) { > for (i = 0; i < mdp->num_rx_ring; i++) > + memcpy(mdp->rx_skbuff[i]->data, > + "Hello, world", 12); > + msleep(100); > + for (i = 0; i < mdp->num_rx_ring; i++) { > + WARN_ON(memcmp(mdp->rx_skbuff[i]->data, > + "Hello, world", 12)); > dev_kfree_skb(mdp->rx_skbuff[i]); > + } > } > kfree(mdp->rx_skbuff); > mdp->rx_skbuff = NULL; then ran the loop: while ethtool -G eth0 rx 128 ; ethtool -G eth0 rx 64; do echo -n .; done and 'ping -f' toward the sh_eth port from another machine. The warning fired several times a minute. To fix these issues: - Deactivate all TX descriptors rather than writing to EDTRR - As there seems to be no way of telling when RX DMA is stopped, perform a soft reset to ensure that both DMA enginess are stopped - To reduce the possibility of the reset truncating a transmitted frame, disable egress and wait a reasonable time to reach a packet boundary before resetting - Update statistics before resetting (The 'reasonable time' does not allow for CS/CD in half-duplex mode, but half-duplex no longer seems reasonable!) Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
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Ben Hutchings authored
If RX traffic is overflowing the FIFO or DMA ring, logging every time this happens just makes things worse. These errors are visible in the statistics anyway. Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
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David S. Miller authored
Florian Fainelli says: ==================== net: phy: prevent double suspend This patch series addresses a problem that Fugang and I observed on different platforms where a given PHY device might end-up being suspended twice. Once as part of the call from ndo_open() all the way down to phy_detach() and phy_suspend() and a second time when the generic platform device/driver suspend/resume callbacks are called in drivers/net/phy/mdio_bus.c. Thanks to Fugang for giving this a quick try on i.MX6/FEC and reporting positive test results! ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
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Florian Fainelli authored
As part of a call to ndo_close() a netdevice driver may call phy_disconnect() -> phy_detach() -> phy_suspend(), such that the PHY is suspsended at this point and a netdevice driver may clock gate the backing peripheral providing MDIO bus accessses as well. Update mdio_bus_phy_may_suspend() to return whether a PHY is allowed to be suspended and conversely resumed if and only if it was not previously suspended before while it is currently in detached (netdev pointer is NULL) state. This fixes bus errors seen during S2/S3 suspend/resume cycles for netdevice drivers such as GENET which clock gates the entire Ethernet MAC, including the MDIO bus block. Acked-by: Fugang Duan <B38611@freescale.com> Tested-by: Fugang Duan <B38611@freescale.com> Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Florian Fainelli authored
In order to avoid double calls to phydev->drv->suspend and resume, keep track of whether the PHY has already been suspended as a consequence of a successful call to phy_suspend(). We will use this in our MDIO bus suspend/resume hooks to avoid a double suspend call. Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Florian Fainelli authored
has_fixups was introduced to help keeping track of fixups/quirks running on a PHY device, but we did not update the comment above struct phy_device accordingly. Fixes: b0ae009f (net: phy: add "has_fixups" boolean property") Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Florian Fainelli authored
phy_suspend and phy_resume are an abstraction on top of the PHY device driver suspend and resume callbacks, utilize those since they are the proper interface to suspending and resuming a PHY device. Acked-by: Fugang Duan <B38611@freescale.com> Tested-by: Fugang Duan <B38611@freescale.com> Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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David S. Miller authored
Hariprasad Shenai says: ==================== Add support to dump cim ibq, obq and qinfo, etc This patch series adds support to dump cim_ibq, cim_obq, sge_qinfo, pm_stats and clk debugfs entries. The patches series is created against 'net-next' tree. And includes patches on cxgb4 driver. We have included all the maintainers of respective drivers. Kindly review the change and let us know in case of any review comments. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
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Hariprasad Shenai authored
Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Hariprasad Shenai authored
Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Hariprasad Shenai authored
Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Hariprasad Shenai authored
Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Hariprasad Shenai authored
Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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David S. Miller authored
Merge tag 'linux-can-fixes-for-3.19-20150127' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can Marc Kleine-Budde says: ==================== pull-request: can 2015-01-27 this is another pull request for net/master which consists of 4 patches. All 4 patches are contributed by Ahmed S. Darwish, he fixes more problems in the kvaser_usb driver. David, please merge net/master to net-next/master, as we have more kvaser_usb patches in the queue, that target net-next. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
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Vivien Didelot authored
Some busy bits are available in the global register 1, such as the ATU Busy bit. We may want to use this function to wait for them to change, so add a new parameter to mv88e6352_wait() instead of hard-coding REG_GLOBAL2. In the meantime, since the REG_READ() macro already checks for error, remove the redundant check for ret < 0. Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Acked-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: David S. Miller <davem@davemloft.net>
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subashab@codeaurora.org authored
An exception is seen in ICMP ping receive path where the skb destructor sock_rfree() tries to access a freed socket. This happens because ping_rcv() releases socket reference with sock_put() and this internally frees up the socket. Later icmp_rcv() will try to free the skb and as part of this, skb destructor is called and which leads to a kernel panic as the socket is freed already in ping_rcv(). -->|exception -007|sk_mem_uncharge -007|sock_rfree -008|skb_release_head_state -009|skb_release_all -009|__kfree_skb -010|kfree_skb -011|icmp_rcv -012|ip_local_deliver_finish Fix this incorrect free by cloning this skb and processing this cloned skb instead. This patch was suggested by Eric Dumazet Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org> Cc: Eric Dumazet <edumazet@google.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Vivien Didelot authored
This commit adds debug messages for the generic mv88e6xxx read and write routines. The output is similar to this: mdio-gpio mdio-gpio.0: <- addr: 0x1b reg: 0x05 val: 0x4000 mdio-gpio mdio-gpio.0: -> addr: 0x1b reg: 0x07 val: 0x3113 mdio-gpio mdio-gpio.0: -> addr: 0x1b reg: 0x08 val: 0x0330 mdio-gpio mdio-gpio.0: -> addr: 0x1b reg: 0x09 val: 0x0000 This is convenient to dynamically debug operations through debugfs with: echo file mv88e6xxx.c +p > <debugfs>/dynamic_debug/control Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Herbert Xu authored
While working on rhashtable walking I noticed that the UDP diag dumping code is buggy. In particular, the socket skipping within a chain never happens, even though we record the number of sockets that should be skipped. As this code was supposedly copied from TCP, this patch does what TCP does and resets num before we walk a chain. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Acked-by: Pavel Emelyanov <xemul@parallels.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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Ahmed S. Darwish authored
While being in an ERROR_WARNING state, and receiving further bus error events with error counters still in the ERROR_WARNING range of 97-127 inclusive, the state handling code erroneously reverts back to ERROR_ACTIVE. Per the CAN standard, only revert to ERROR_ACTIVE when the error counters are less than 96. Moreover, in certain Kvaser models, the BUS_ERROR flag is always set along with undefined bits in the M16C status register. Thus use bitwise operators instead of full equality for checking that register against bus errors. Signed-off-by: Ahmed S. Darwish <ahmed.darwish@valeo.com> Cc: linux-stable <stable@vger.kernel.org> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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Ahmed S. Darwish authored
On some x86 laptops, plugging a Kvaser device again after an unplug makes the firmware always ignore the very first command. For such a case, provide some room for retries instead of completely exiting the driver init code. Signed-off-by: Ahmed S. Darwish <ahmed.darwish@valeo.com> Cc: linux-stable <stable@vger.kernel.org> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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Ahmed S. Darwish authored
Send expected argument to the URB completion hander: a CAN netdevice instead of the network interface private context `kvaser_usb_net_priv'. This was discovered by having some garbage in the kernel log in place of the netdevice names: can0 and can1. Signed-off-by: Ahmed S. Darwish <ahmed.darwish@valeo.com> Cc: linux-stable <stable@vger.kernel.org> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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Ahmed S. Darwish authored
Upon receiving a hardware event with the BUS_RESET flag set, the driver kills all of its anchored URBs and resets all of its transmit URB contexts. Unfortunately it does so under the context of URB completion handler `kvaser_usb_read_bulk_callback()', which is often called in an atomic context. While the device is flooded with many received error packets, usb_kill_urb() typically sleeps/reschedules till the transfer request of each killed URB in question completes, leading to the sleep in atomic bug. [3] In v2 submission of the original driver patch [1], it was stated that the URBs kill and tx contexts reset was needed since we don't receive any tx acknowledgments later and thus such resources will be locked down forever. Fortunately this is no longer needed since an earlier bugfix in this patch series is now applied: all tx URB contexts are reset upon CAN channel close. [2] Moreover, a BUS_RESET is now treated _exactly_ like a BUS_OFF event, which is the recommended handling method advised by the device manufacturer. [1] http://article.gmane.org/gmane.linux.network/239442 http://www.webcitation.org/6Vr2yagAQ [2] can: kvaser_usb: Reset all URB tx contexts upon channel close 889b77f7 [3] Stacktrace: <IRQ> [<ffffffff8158de87>] dump_stack+0x45/0x57 [<ffffffff8158b60c>] __schedule_bug+0x41/0x4f [<ffffffff815904b1>] __schedule+0x5f1/0x700 [<ffffffff8159360a>] ? _raw_spin_unlock_irqrestore+0xa/0x10 [<ffffffff81590684>] schedule+0x24/0x70 [<ffffffff8147d0a5>] usb_kill_urb+0x65/0xa0 [<ffffffff81077970>] ? prepare_to_wait_event+0x110/0x110 [<ffffffff8147d7d8>] usb_kill_anchored_urbs+0x48/0x80 [<ffffffffa01f4028>] kvaser_usb_unlink_tx_urbs+0x18/0x50 [kvaser_usb] [<ffffffffa01f45d0>] kvaser_usb_rx_error+0xc0/0x400 [kvaser_usb] [<ffffffff8108b14a>] ? vprintk_default+0x1a/0x20 [<ffffffffa01f5241>] kvaser_usb_read_bulk_callback+0x4c1/0x5f0 [kvaser_usb] [<ffffffff8147a73e>] __usb_hcd_giveback_urb+0x5e/0xc0 [<ffffffff8147a8a1>] usb_hcd_giveback_urb+0x41/0x110 [<ffffffffa0008748>] finish_urb+0x98/0x180 [ohci_hcd] [<ffffffff810cd1a7>] ? acct_account_cputime+0x17/0x20 [<ffffffff81069f65>] ? local_clock+0x15/0x30 [<ffffffffa000a36b>] ohci_work+0x1fb/0x5a0 [ohci_hcd] [<ffffffff814fbb31>] ? process_backlog+0xb1/0x130 [<ffffffffa000cd5b>] ohci_irq+0xeb/0x270 [ohci_hcd] [<ffffffff81479fc1>] usb_hcd_irq+0x21/0x30 [<ffffffff8108bfd3>] handle_irq_event_percpu+0x43/0x120 [<ffffffff8108c0ed>] handle_irq_event+0x3d/0x60 [<ffffffff8108ec84>] handle_fasteoi_irq+0x74/0x110 [<ffffffff81004dfd>] handle_irq+0x1d/0x30 [<ffffffff81004727>] do_IRQ+0x57/0x100 [<ffffffff8159482a>] common_interrupt+0x6a/0x6a Signed-off-by: Ahmed S. Darwish <ahmed.darwish@valeo.com> Cc: linux-stable <stable@vger.kernel.org> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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