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Filename Latest commit message Latest commit date
Ganesh Goudar 1abc7be57c powerpc/eeh: Set channel state after notifying the drivers 
[ Upstream commit 9efcdaac36e1643a1b7f5337e6143ce142d381b1 ]

When a PCI error is encountered 6th time in an hour we
set the channel state to perm_failure and notify the
driver about the permanent failure.

However, after upstream commit 38ddc01147 ("powerpc/eeh:
Make permanently failed devices non-actionable"), EEH handler
stops calling any routine once the device is marked as
permanent failure. This issue can lead to fatal consequences
like kernel hang with certain PCI devices.

Following log is observed with lpfc driver, with and without
this change, Without this change kernel hangs, If PCI error
is encountered 6 times for a device in an hour.

Without the change

 EEH: Beginning: 'error_detected(permanent failure)'
 PCI 0132:60:00.0#600000: EEH: not actionable (1,1,1)
 PCI 0132:60:00.1#600000: EEH: not actionable (1,1,1)
 EEH: Finished:'error_detected(permanent failure)'

With the change

 EEH: Beginning: 'error_detected(permanent failure)'
 EEH: Invoking lpfc->error_detected(permanent failure)
 EEH: lpfc driver reports: 'disconnect'
 EEH: Invoking lpfc->error_detected(permanent failure)
 EEH: lpfc driver reports: 'disconnect'
 EEH: Finished:'error_detected(permanent failure)'

To fix the issue, set channel state to permanent failure after
notifying the drivers.

Fixes: 38ddc01147 ("powerpc/eeh: Make permanently failed devices non-actionable")
Suggested-by: Mahesh Salgaonkar <mahesh@linux.ibm.com>
Signed-off-by: Ganesh Goudar <ganeshgr@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20230209105649.127707-1-ganeshgr@linux.ibm.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-03-11 16:43:52 +01:00
arch powerpc/eeh: Set channel state after notifying the drivers 2023-03-11 16:43:52 +01:00
block block: bio-integrity: Copy flags when bio_integrity_payload is cloned 2023-03-11 16:43:35 +01:00
certs
crypto crypto: rsa-pkcs1pad - Use akcipher_request_complete 2023-03-11 16:43:41 +01:00
Documentation docs: Fix path paste-o for /sys/kernel/warn_count 2023-02-06 07:52:50 +01:00
drivers clk: Honor CLK_OPS_PARENT_ENABLE in clk_core_is_enabled() 2023-03-11 16:43:51 +01:00
fs gfs2: jdata writepage fix 2023-03-11 16:43:49 +01:00
include ASoC: soc-dapm.h: fixup warning struct snd_pcm_substream not declared 2023-03-11 16:43:48 +01:00
init
ipc
kernel treewide: Replace DECLARE_TASKLET() with DECLARE_TASKLET_OLD() 2023-03-11 16:43:42 +01:00
lib lib/mpi: Fix buffer overrun when SG is too long 2023-03-11 16:43:38 +01:00
LICENSES
mm Revert "mm: Always release pages to the buddy allocator in memblock_free_late()." 2023-02-22 12:50:39 +01:00
net wifi: mac80211: make rate u32 in sta_set_rate_info_rx() 2023-03-11 16:43:42 +01:00
samples
scripts
security
sound ASoC: soc-compress.c: fixup private_data on snd_soc_new_compress() 2023-03-11 16:43:46 +01:00
tools selftests/ftrace: Fix bash specific "==" operator 2023-03-11 16:43:50 +01:00
usr
virt
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS net/phy/mdio-i2c: Move header file to include/linux/mdio 2023-02-06 07:52:46 +01:00
Makefile Linux 5.4.234 2023-03-03 11:41:49 +01:00
README

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.