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- 14 Jun, 2012 32 commits
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Bart Westgeest authored
Changed setting the status bits to a byte-oriented approach. Number of written status bits is now based on VHCI_NPORT, instead of casting status buffer to a long. This fixes a stack corruption bug on 64-bit based architectures, and potential byte order / endianness related issues. In addition updated function comments, and log statements. Signed-off-by:
Bart Westgeest <bart@elbrys.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Seth Jennings authored
This patch fixes an uninitialized variable warning in alloc_zspage(). It also fixes the secondary issue of prev_page leaving scope on each loop iteration. The only reason this ever worked was because prev_page was occupying the same space on the stack on each iteration. Signed-off-by:
Seth Jennings <sjenning@linux.vnet.ibm.com> Reported-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
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H Hartley Sweeten authored
Add whitespace to the _8255_* defines to improve readability. Signed-off-by:
H Hartley Sweeten <hsweeten@visionengravers.com> Cc: Ian Abbott <abbotti@mev.co.uk> Cc: Frank Mori Hess <fmhess@users.sourceforge.net> Signed-off-by:
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H Hartley Sweeten authored
The name 'do_config' is pretty generic, and this function is the only one in this driver without namespace. Add namespace to it just to avoid any issues. Signed-off-by:
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H Hartley Sweeten authored
The subdev_8255_interrupt function indirectly calls subdev_8255_io. For aesthetic reasons, move the subdev_8255_io function. Signed-off-by:
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H Hartley Sweeten authored
Refactor the subdev_8255_insn function to follow what the user space library is doing. 1) This function requires 'data' to contain 2 parameters. Add a sanity check for this (insn->n != 2). 2) The 'data' parameters are actually a 'mask' of the valid bits and the actual 'bits' to modify. Create local variables of these names to help with maintainability. 3) The value returned in data[1] reflects the actual state of the 8255 io pins after the update of the masked bits. Fetch this data in a local variable and then set data[1]. 4) The user space library only checks for a < 0 return to indicate an error. It appears that the 'return 2' in this function is supposed to indicate the number of data parameters used to perform the command. Return the insn->n value for this, the open coded '2' looks wrong. Signed-off-by:
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H Hartley Sweeten authored
To improve readability, use a locale variable to hold the 8255's private iobase value. Signed-off-by:
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H Hartley Sweeten authored
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H Hartley Sweeten authored
The initialization of the 8255 subdevice can fail. Make sure to check for it. Signed-off-by:
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H Hartley Sweeten authored
The have_irq variable in the 8255 private data is not used by the driver, remove it. This removes the need to access the private data in the subdev_8255_init_irq function. Also, add a bit of whitespace to improve the readability. Signed-off-by:
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H Hartley Sweeten authored
Refactor the initialization of the 8255 so that the private data allocation is done before the subdevice is setup. This makes sure that the setup is complete. Also, add a bit of whitespace to improve the readability. Signed-off-by:
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H Hartley Sweeten authored
Push out the rename of the private variables to improve the readability of the driver. Signed-off-by:
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H Hartley Sweeten authored
The 8255's private data variables cb_arg and cb_func are actually the iobase for the 8255 device and the pointer to the io function to access the device. Rename them as such to improve the readability of the driver. Signed-off-by:
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H Hartley Sweeten authored
The macros CALLBACK_ARG, CALLBACK_FUNC, and subdevpriv all rely on a a local variable having a specific name. Replace the macros with local variables wherever they occur. Signed-off-by:
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H Hartley Sweeten authored
Rename the 8255's private data structure from subdev_8255_struct to subdev_8255_private. Signed-off-by:
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H Hartley Sweeten authored
Instead of accessing the dev->subdevices directly as an array, use a pointer. This method is more common in the comedi subsystem. Signed-off-by:
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H Hartley Sweeten authored
Replace the printk calls with dev_info, dev_warn, etc. Signed-off-by:
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Peter Huewe authored
This patch cleans up the vb_device_info struct and the related functions. The cleanup decreases the size of the compiled module by about 10kB. == Remove fields in vb_device_info that are never read: == pOutputSelect pRGBSenseData pRGBSenseData2 pVideoSenseData pVideoSenseData2 pYCSenseData pYCSenseData2 CR49 pXGINew_I2CDefinition pCR2E pCR2F pCR46 pCR47 pCRD0 pCRDE pSR40 pSR41 pCR47 === Remove the corresponding 'constants' === XGI330_RGBSenseData XGI330_RGBSenseData2 XGI330_VideoSenseData XGI330_VideoSenseData2 XGI330_YCSenseData XGI330_YCSenseData2 XGI330_CR49 XG40_I2CDefinition XG21_CR2E XG21_CR2F XG21_CR46 XG21_CR47 XG27_CRD0 XG27_CRDE XGI330_OutputSelect == Remove 'constant fields' and replace constant value with #define == pSR07 = XGI330_SR07 -> 0x18 pSR1F = XGI330_SR1F -> 0 pSR23 = XGI330_SR23 -> 0xf6 pSR24 = XGI330_SR24 -> 0x0d pSR33 = XGI330_SR33 ->0 pCRT2Data_1_2 = XGI330_CRT2Data_1_2 -> 0 pCRT2Data_4_D = XGI330_CRT2Data_4_D -> 0 pCRT2Data_4_E = XGI330_CRT2Data_4_E -> 0 pCRT2Data_4_10 = XGI330_CRT2Data_4_10 -> 0x80 pSR36 = XG27_SR36 -> 0x30 pCR8F = &XG27_CR8F -> 0x0C pSR40 = XG27_SR40 -> 0x04 pSR41 = XG27_SR41 ->0x00 pSR31 = XGI330_SR31 -> 0xc0 pSR32 = XGI330_SR32 -> 0xc0 SR25 = XGI330_sr25 -> 0 (we only use XGI330_sr25[0]) == Constant fields with 'dead' code: == pSoftSetting is set to XGI330_SoftSetting = 0x30 -> if (*pVBInfo->pSoftSetting & SoftDRAMType) is never true since SoftDRAMType = 0x80 -> if (*pVBInfo->pSoftSetting & ModeSoftSetting) is never true since ModeSoftSetting = 0x04 --> remove the code, remove pSoftSetting, remove XGI330_SoftSetting pDVOSetting is set to XG21_DVOSetting = 0 -> if (((*pVBInfo->pDVOSetting) & 0xC0) == 0xC0) is never true --> remove the code, remove pDVOSetting, remove XG21_DVOSetting pXGINew_DRAMTypeDefinition is set to &XG40_DRAMTypeDefinition 0xFF -> if (*pVBInfo->pXGINew_DRAMTypeDefinition != 0x0C) is always true --> remove the if and remove pXGINew_DRAMTypeDefinition remove XG40_DRAMTypeDefinition == Replace pointer to unsigned char with unsigned char variable and assign value of referenced pointer: == pSR21 -> SR21, remove XGI330_SR21 pSR22 -> SR22, remove XGI330_SR22 pXGINew_CR97 -> XGINew_CR97, remove XG20_CR97, XG27_CR97 and Z11m_CR97 Signed-off-by:
Peter Huewe <peterhuewe@gmx.de> Signed-off-by:
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Peter Huewe authored
This patch replaces some of the XGI internal structs by their counterparts in the SiS driver. XGI330_LVDSDataStruct -> SiS_LVDSData XGI330_LCDDataStruct -> SiS_LCDData XGI330_CHTVDataStruct -> SiS_LVDSData Signed-off-by:
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Peter Huewe authored
For TV Devices: The values taken from XGI_TVDelayList are always overwritten with the values from XGI_TVDelayList2 since the if condition for using the values from XGI_TVDelayList2 is identical with the check to enter this scope and thus always true. The delay values in XGI_TVDelayList2 is always 0x22 so we can simply replace it with this constant value. For LCD Devices: The LCD_DelayCompensation field is always set to 0x12 so we can simply replace this field with a constant value. This saves about 500 bytes in compiled size. Signed-off-by:
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Peter Huewe authored
Since XGI_CloseCRTC does not perform anything useful we can simply remove it. Signed-off-by:
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Peter Huewe authored
This patch simplyfies the XGI_GetVCLK2Ptr a bit by moving the +=25 to a define and removing statements without effect. Signed-off-by:
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Peter Huewe authored
This patch removes the arrays in XGI_GetVCLK2Ptr which each contain only one value four times and replaces them with their constant value. Signed-off-by:
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Peter Huewe authored
Since the first three entries in XGINew_DDRDRAM_TYPE{340,20} are never used, we can simply remove them; and instead of passing XGINew_DDRDRAM_TYPE with an index we can simply pass the value directly to XGINew_SetDRAMSize20Reg. Signed-off-by: -
Peter Huewe authored
Since the function XGINew_SetDRAMSizingType is only called from one location and consist only of 2 valuable lines we can simply inline it here. Signed-off-by:
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Peter Huewe authored
Since XGINew_SetDRAMSize20Reg now handles both cases we can remove the code duplication in XGINew_DDRSizing340. Signed-off-by:
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Peter Huewe authored
This patch consolidates the almost identical functions XGINew_SetDRAMSizeReg and XGINew_SetDRAMSize20Reg as they are implemented identically except one division factor. The changed factor is now reflected in the input data. Signed-off-by:
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Peter Huewe authored
This patch removes all unnecessary, redundant and superfluous header includes from xgifb. Tested on hp t5325 (XGI Z11) Signed-off-by:
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Peter Huewe authored
This patch adds a simple #include guard to vb_table.h Signed-off-by:
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Peter Huewe authored
This adds a mutex for fb_mmap around smem_start and smem_len so the mutex inside the fb_mmap() is actually used. Changing of these fields before calling the framebuffer_register() are not mutexed. We check whether framebuffer_register has been called by reading fbinfo->count. See 537a1bf0 - "fbdev: add mutex for fb_mmap locking" by Krzysztof Helt for details. Signed-off-by:
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Peter Huewe authored
This patch removes assignments to the fb_fix_screeninfo struct which are overwritten by the memset in XGIfb_get_fix() a few lines later. Since the name/id might be useful this was moved to XGIfb_get_fix(). Signed-off-by:
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Anton Vorontsov authored
All the functionality is now supported by pstore and pstore_ram drivers. Signed-off-by:
Anton Vorontsov <anton.vorontsov@linaro.org> Acked-by:
Kees Cook <keescook@chromium.org> Acked-by:
Colin Cross <ccross@android.com> Signed-off-by:
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- 13 Jun, 2012 8 commits
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Anton Vorontsov authored
Having automatic updates seems pointless for production system, and even dangerous and thus counter-productive: 1. If we can mount pstore, or read files, we can as well read /proc/kmsg. So, there's little point in duplicating the functionality and present the same information but via another userland ABI; 2. Expecting the kernel to behave sanely after oops/panic is naive. It might work, but you'd rather not try it. Screwed up kernel can do rather bad things, like recursive faults[1]; and pstore rather provoking bad things to happen. It uses: 1. Timers (assumes sane interrupts state); 2. Workqueues and mutexes (assumes scheduler in a sane state); 3. kzalloc (a working slab allocator); That's too much for a dead kernel, so the debugging facility itself might just make debugging harder, which is not what we want. Maybe for non-oops message types it would make sense to re-enable automatic updates, but so far I don't see any use case for this. Even for tracing, it has its own run-time/normal ABI, so we're only interested in pstore upon next boot, to retrieve what has gone wrong with HW or SW. So, let's disable the updates by default. [1] BUG: unable to handle kernel paging request at fffffffffffffff8 IP: [<ffffffff8104801b>] kthread_data+0xb/0x20 [...] Process kworker/0:1 (pid: 14, threadinfo ffff8800072c0000, task ffff88000725b100) [... Call Trace: [<ffffffff81043710>] wq_worker_sleeping+0x10/0xa0 [<ffffffff813687a8>] __schedule+0x568/0x7d0 [<ffffffff8106c24d>] ? trace_hardirqs_on+0xd/0x10 [<ffffffff81087e22>] ? call_rcu_sched+0x12/0x20 [<ffffffff8102b596>] ? release_task+0x156/0x2d0 [<ffffffff8102b45e>] ? release_task+0x1e/0x2d0 [<ffffffff8106c24d>] ? trace_hardirqs_on+0xd/0x10 [<ffffffff81368ac4>] schedule+0x24/0x70 [<ffffffff8102cba8>] do_exit+0x1f8/0x370 [<ffffffff810051e7>] oops_end+0x77/0xb0 [<ffffffff8135c301>] no_context+0x1a6/0x1b5 [<ffffffff8135c4de>] __bad_area_nosemaphore+0x1ce/0x1ed [<ffffffff81053156>] ? ttwu_queue+0xc6/0xe0 [<ffffffff8135c50b>] bad_area_nosemaphore+0xe/0x10 [<ffffffff8101fa47>] do_page_fault+0x2c7/0x450 [<ffffffff8106e34b>] ? __lock_release+0x6b/0xe0 [<ffffffff8106bf21>] ? mark_held_locks+0x61/0x140 [<ffffffff810502fe>] ? __wake_up+0x4e/0x70 [<ffffffff81185f7d>] ? trace_hardirqs_off_thunk+0x3a/0x3c [<ffffffff81158970>] ? pstore_register+0x120/0x120 [<ffffffff8136a37f>] page_fault+0x1f/0x30 [<ffffffff81158970>] ? pstore_register+0x120/0x120 [<ffffffff81185ab8>] ? memcpy+0x68/0x110 [<ffffffff8115875a>] ? pstore_get_records+0x3a/0x130 [<ffffffff811590f4>] ? persistent_ram_copy_old+0x64/0x90 [<ffffffff81158bf4>] ramoops_pstore_read+0x84/0x130 [<ffffffff81158799>] pstore_get_records+0x79/0x130 [<ffffffff81042536>] ? process_one_work+0x116/0x450 [<ffffffff81158970>] ? pstore_register+0x120/0x120 [<ffffffff8115897e>] pstore_dowork+0xe/0x10 [<ffffffff81042594>] process_one_work+0x174/0x450 [<ffffffff81042536>] ? process_one_work+0x116/0x450 [<ffffffff81042e13>] worker_thread+0x123/0x2d0 [<ffffffff81042cf0>] ? manage_workers.isra.28+0x120/0x120 [<ffffffff81047d8e>] kthread+0x8e/0xa0 [<ffffffff8136ba74>] kernel_thread_helper+0x4/0x10 [<ffffffff8136a199>] ? retint_restore_args+0xe/0xe [<ffffffff81047d00>] ? __init_kthread_worker+0x70/0x70 [<ffffffff8136ba70>] ? gs_change+0xb/0xb Code: be e2 00 00 00 48 c7 c7 d1 2a 4e 81 e8 bf fb fd ff 48 8b 5d f0 4c 8b 65 f8 c9 c3 0f 1f 44 00 00 48 8b 87 08 02 00 00 55 48 89 e5 <48> 8b 40 f8 5d c3 66 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 RIP [<ffffffff8104801b>] kthread_data+0xb/0x20 RSP <ffff8800072c1888> CR2: fffffffffffffff8 ---[ end trace 996a332dc399111d ]--- Fixing recursive fault but reboot is needed! Signed-off-by:
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Anton Vorontsov authored
There is no behavioural change, the default value is still 60 seconds. Signed-off-by:
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Anton Vorontsov authored
The code tried to maintain the global list of persistent ram zones, which isn't a great idea overall, plus since Android's ram_console is no longer there, we can remove some unused functions. Signed-off-by:
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Anton Vorontsov authored
Suggested-by:
Shuah Khan <shuahkhan@gmail.com> Signed-off-by:
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Anton Vorontsov authored
Since we use multiple regions, the messages are somewhat annoying. We do print total mapped memory already, so no need to print the information for each region in the library routines. Signed-off-by:
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Anton Vorontsov authored
The console log size is configurable via ramoops.console_size module option, and the log itself is available via <pstore-mount>/console-ramoops file. Signed-off-by:
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Anton Vorontsov authored
This will help make code clearer when we'll add support for other message types. The patch also changes return value from -EINVAL to 0 in case of end-of-records. The exact value doesn't matter for pstore (it should be just <= 0), but 0 feels more correct. Signed-off-by:
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Anton Vorontsov authored
This will help make code clearer when we'll add support for other message types. This also makes probe() much shorter and understandable, plus makes mem/record size checking a bit easier. Implementation detail: we now use a paddr pointer, this will be used for allocating persistent ram zones for other message types. Signed-off-by:
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