kernel/git/stable/linux.git/drivers/edac/edac_module.h, branch master

EDAC/device_sysfs: Cleanup around edac_device_ctl_poll_msec_store()

2026-08-07T23:30:52+00:00

- Align function args - Fix comment style - Fixup formatting around edac_device_reset_delay_period() too The not-too-trivial change is converting the edac_device_reset_delay_period() msec argument to unsigned int as that is what the rest of the code expects. Signed-off-by: Borislav Petkov (AMD)

EDAC/device: Fix period calculation in edac_device_reset_delay_period()

2022-12-30T14:51:41+00:00

Fix period calculation in case user sets a value of 1000. The input of round_jiffies_relative() should be in jiffies and not in milli-seconds. [ bp: Use the same code pattern as in edac_device_workq_setup() for clarity. ] Fixes: c4cf3b454eca ("EDAC: Rework workqueue handling") Signed-off-by: Eliav Farber Signed-off-by: Borislav Petkov (AMD) Cc: Link: https://lore.kernel.org/r/20221020124458.22153-1-farbere@amazon.com

EDAC: Check for GHES preference in the chipset-specific EDAC drivers

2022-10-21T20:09:54+00:00

Call ghes_get_devices() to check whether ghes_edac should be used on the platform where it is preferred over the corresponding chipset-specific EDAC driver. Unlike the existing edac_get_owner() check, the ghes_get_devices() check works independent to the module_init ordering. [ bp: Massage. ] Suggested-by: Toshi Kani Signed-off-by: Jia He Signed-off-by: Borislav Petkov Link: https://lore.kernel.org/r/20221010023559.69655-6-justin.he@arm.com

EDAC: Remove obsolete declarations in edac_module.h

2022-09-11T10:26:41+00:00

Commit 4de78c6877ec ("drivers/edac: mod PCI poll names"), renamed the respective variables and accessors but left the old accessor declarations edac_get_log_ce(), edac_get_log_ue(), edac_get_poll_msec() and edac_get_panic_on_ue() in place. Remove them. [ bp: Masssage commit message. ] Signed-off-by: Gaosheng Cui Signed-off-by: Borislav Petkov Link: https://lore.kernel.org/r/20220911094038.3224365-1-cuigaosheng1@huawei.com

EDAC/mc: Get rid of edac_align_ptr()

2022-04-11T10:04:11+00:00

Get rid of it now that it is unused. Signed-off-by: Borislav Petkov Link: https://lore.kernel.org/r/20220310095254.1510-6-bp@alien8.de

EDAC/mc: Change mci device removal to use put_device()

2020-02-17T11:32:44+00:00

There are dimm and csrow devices linked to the mci device esp. to show up in sysfs. It must be granted that children devices are removed before its mci parent. Thus, the release functions must be called in the correct order and may not miss any child before releasing its parent. In the current implementation this is only granted by the correct order of release functions. A much better approach is to use put_device() that releases the device only after all users are gone. It is the recommended way to release a device and free its memory. The function uses the device's refcount and only frees it if there are no users of it anymore such as children. So implement a mci_release() function to remove mci devices, use put_device() to free them and early initialize the mci device right after its struct has been allocated. Change the release function so that it can be universally used no matter if the device is registered or not. Since subsequent dimm and csrow sysfs links are implemented as children devices, their refcounts will keep the parent mci device from being removed as long as sysfs entries exist and until all users have been unregistered in edac_remove_sysfs_mci_device(). Remove edac_unregister_sysfs() and merge mci sysfs removal into edac_remove_sysfs_mci_device(). There is only a single instance now that removes the sysfs entries. The function can now be used in the error paths for cleanup. Also, create device release functions for all involved devices (dev->release), remove device_type release functions (dev_type-> release) and also use dev->init_name instead of dev_set_name(). [ bp: Massage commit message and comments. ] Signed-off-by: Robert Richter Signed-off-by: Borislav Petkov Acked-by: Aristeu Rozanski Link: https://lkml.kernel.org/r/20200212120340.4764-5-rrichter@marvell.com

ARM: 8892/1: EDAC: Add missing debugfs_create_x32 wrapper

2019-08-29T06:58:01+00:00

We already have wrappers for x8 and x16, so add the missing x32 one. Signed-off-by: Jan Luebbe Reviewed-by: Borislav Petkov Signed-off-by: Chris Packham Signed-off-by: Russell King

EDAC: Fix global-out-of-bounds write when setting edac_mc_poll_msec

2019-06-27T17:24:47+00:00

Commit 9da21b1509d8 ("EDAC: Poll timeout cannot be zero, p2") assumes edac_mc_poll_msec to be unsigned long, but the type of the variable still remained as int. Setting edac_mc_poll_msec can trigger out-of-bounds write. Reproducer: # echo 1001 > /sys/module/edac_core/parameters/edac_mc_poll_msec KASAN report: BUG: KASAN: global-out-of-bounds in edac_set_poll_msec+0x140/0x150 Write of size 8 at addr ffffffffb91b2d00 by task bash/1996 CPU: 1 PID: 1996 Comm: bash Not tainted 5.2.0-rc6+ #23 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-2.fc30 04/01/2014 Call Trace: dump_stack+0xca/0x13e print_address_description.cold+0x5/0x246 __kasan_report.cold+0x75/0x9a ? edac_set_poll_msec+0x140/0x150 kasan_report+0xe/0x20 edac_set_poll_msec+0x140/0x150 ? dimmdev_location_show+0x30/0x30 ? vfs_lock_file+0xe0/0xe0 ? _raw_spin_lock+0x87/0xe0 param_attr_store+0x1b5/0x310 ? param_array_set+0x4f0/0x4f0 module_attr_store+0x58/0x80 ? module_attr_show+0x80/0x80 sysfs_kf_write+0x13d/0x1a0 kernfs_fop_write+0x2bc/0x460 ? sysfs_kf_bin_read+0x270/0x270 ? kernfs_notify+0x1f0/0x1f0 __vfs_write+0x81/0x100 vfs_write+0x1e1/0x560 ksys_write+0x126/0x250 ? __ia32_sys_read+0xb0/0xb0 ? do_syscall_64+0x1f/0x390 do_syscall_64+0xc1/0x390 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fa7caa5e970 Code: 73 01 c3 48 8b 0d 28 d5 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 99 2d 2c 00 00 75 10 b8 01 00 00 00 04 RSP: 002b:00007fff6acfdfe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007fa7caa5e970 RDX: 0000000000000005 RSI: 0000000000e95c08 RDI: 0000000000000001 RBP: 0000000000e95c08 R08: 00007fa7cad1e760 R09: 00007fa7cb36a700 R10: 0000000000000073 R11: 0000000000000246 R12: 0000000000000005 R13: 0000000000000001 R14: 00007fa7cad1d600 R15: 0000000000000005 The buggy address belongs to the variable: edac_mc_poll_msec+0x0/0x40 Memory state around the buggy address: ffffffffb91b2c00: 00 00 00 00 fa fa fa fa 00 00 00 00 fa fa fa fa ffffffffb91b2c80: 00 00 00 00 fa fa fa fa 00 00 00 00 fa fa fa fa >ffffffffb91b2d00: 04 fa fa fa fa fa fa fa 04 fa fa fa fa fa fa fa ^ ffffffffb91b2d80: 04 fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00 ffffffffb91b2e00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 Fix it by changing the type of edac_mc_poll_msec to unsigned int. The reason why this patch adopts unsigned int rather than unsigned long is msecs_to_jiffies() assumes arg to be unsigned int. We can avoid integer conversion bugs and unsigned int will be large enough for edac_mc_poll_msec. Reviewed-by: James Morse Fixes: 9da21b1509d8 ("EDAC: Poll timeout cannot be zero, p2") Signed-off-by: Eiichi Tsukata Signed-off-by: Tony Luck

EDAC: Make edac_debugfs_create_x*() return void

2019-06-20T18:44:36+00:00

The return values of edac_debugfs_create_x16() and edac_debugfs_create_x8() are never checked (as they don't need to be), so no need to have them return anything, just make the functions return void instead. This is done with the goal of being able to change the debugfs_create_x* functions to also not return a value. Signed-off-by: Greg Kroah-Hartman Signed-off-by: Borislav Petkov Cc: James Morse Cc: linux-edac Cc: Mauro Carvalho Chehab Link: https://lkml.kernel.org/r/20190611175433.GA5108@kroah.com

EDAC: Do not check return value of debugfs_create() functions

2019-01-23T09:41:18+00:00

When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. [ bp: Make edac_debugfs_init() return void too, while at it. ] Signed-off-by: Greg Kroah-Hartman Signed-off-by: Borislav Petkov Cc: James Morse Cc: Mauro Carvalho Chehab Cc: linux-edac Link: https://lkml.kernel.org/r/20190122152151.16139-17-gregkh@linuxfoundation.org