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Brian Kao 496ca70a15 scsi: ufs: core: Fix EH failure after W-LUN resume error 
[ Upstream commit b4bb6daf4a ]

When a W-LUN resume fails, its parent devices in the SCSI hierarchy,
including the scsi_target, may be runtime suspended. Subsequently, the
error handler in ufshcd_recover_pm_error() fails to set the W-LUN device
back to active because the parent target is not active.  This results in
the following errors:

  google-ufshcd 3c2d0000.ufs: ufshcd_err_handler started; HBA state eh_fatal; ...
  ufs_device_wlun 0:0:0:49488: START_STOP failed for power mode: 1, result 40000
  ufs_device_wlun 0:0:0:49488: ufshcd_wl_runtime_resume failed: -5
  ...
  ufs_device_wlun 0:0:0:49488: runtime PM trying to activate child device 0:0:0:49488 but parent (target0:0:0) is not active

Address this by:

 1. Ensuring the W-LUN's parent scsi_target is runtime resumed before
    attempting to set the W-LUN to active within
    ufshcd_recover_pm_error().

 2. Explicitly checking for power.runtime_error on the HBA and W-LUN
    devices before calling pm_runtime_set_active() to clear the error
    state.

 3. Adding pm_runtime_get_sync(hba->dev) in
    ufshcd_err_handling_prepare() to ensure the HBA itself is active
    during error recovery, even if a child device resume failed.

These changes ensure the device power states are managed correctly
during error recovery.

Signed-off-by: Brian Kao <powenkao@google.com>
Tested-by: Brian Kao <powenkao@google.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Link: https://patch.msgid.link/20251112063214.1195761-1-powenkao@google.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2026-01-17 16:31:20 +01:00
arch alpha: don't reference obsolete termio struct for TC* constants 2026-01-17 16:31:18 +01:00
block block: fix NULL pointer dereference in blk_zone_reset_all_bio_endio() 2026-01-08 10:15:06 +01:00
certs sign-file,extract-cert: use pkcs11 provider for OPENSSL MAJOR >= 3 2024-09-20 19:52:48 +03:00
crypto crypto: seqiv - Do not use req->iv after crypto_aead_encrypt 2026-01-08 10:14:32 +01:00
Documentation soundwire: stream: extend sdw_alloc_stream() to take 'type' parameter 2026-01-08 10:15:04 +01:00
drivers scsi: ufs: core: Fix EH failure after W-LUN resume error 2026-01-17 16:31:20 +01:00
fs smb/client: fix NT_STATUS_NO_DATA_DETECTED value 2026-01-17 16:31:19 +01:00
include NFSD: Remove NFSERR_EAGAIN 2026-01-17 16:31:15 +01:00
init init: handle bootloader identifier in kernel parameters 2025-10-19 16:33:50 +02:00
io_uring io_uring: fix min_wait wakeups for SQPOLL 2026-01-08 10:14:25 +01:00
ipc ipc: fix to protect IPCS lookups using RCU 2025-06-27 11:11:22 +01:00
kernel sched/fair: Proportional newidle balance 2026-01-11 15:25:21 +01:00
lib lib/crypto: aes: Fix missing MMU protection for AES S-box 2026-01-17 16:31:16 +01:00
LICENSES LICENSES: add 0BSD license text 2024-09-01 20:43:24 -07:00
mm mm/page_alloc: change all pageblocks migrate type on coalescing 2026-01-11 15:25:20 +01:00
net tls: Use __sk_dst_get() and dst_dev_rcu() in get_netdev_for_sock(). 2026-01-17 16:31:18 +01:00
rust rust: kbuild: workaround rustdoc doctests modifier bug 2025-11-24 10:36:07 +01:00
samples samples/ftrace: Adjust LoongArch register restore order in direct calls 2026-01-08 10:14:50 +01:00
scripts kbuild: fix compilation of dtb specified on command-line without make rule 2026-01-08 10:14:34 +01:00
security KEYS: trusted: Fix a memory leak in tpm2_load_cmd 2026-01-08 10:14:13 +01:00
sound ASoC: rockchip: Fix Wvoid-pointer-to-enum-cast warning (again) 2026-01-17 16:31:19 +01:00
tools tools/mm/page_owner_sort: fix timestamp comparison for stable sorting 2026-01-08 10:14:50 +01:00
usr kbuild: uapi: Strip comments before size type check 2025-11-13 15:34:35 -05:00
virt KVM: Disallow toggling KVM_MEM_GUEST_MEMFD on an existing memslot 2026-01-08 10:14:21 +01:00
.clang-format clang-format: Update with v6.11-rc1's for_each macro list 2024-08-02 13:20:31 +02:00
.clippy.toml rust: give Clippy the minimum supported Rust version 2025-08-01 09:48:44 +01:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.editorconfig .editorconfig: remove trim_trailing_whitespace option 2024-06-13 16:47:52 +02:00
.get_maintainer.ignore Add Jeff Kirsher to .get_maintainer.ignore 2024-03-08 11:36:54 +00:00
.gitattributes .gitattributes: set diff driver for Rust source code files 2023-05-31 17:48:25 +02:00
.gitignore rust: introduce .clippy.toml 2025-03-13 13:01:42 +01:00
.mailmap mailmap: add entry for Thorsten Blum 2024-11-07 14:14:59 -08:00
.rustfmt.toml rust: add .rustfmt.toml 2022-09-28 09:02:20 +02:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: Remove self from DSA entry 2024-11-03 12:52:38 -08:00
Kbuild Kbuild updates for v6.1 2022-10-10 12:00:45 -07:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS staging: rtl8712: Remove driver using deprecated API wext 2025-12-07 06:25:02 +09:00
Makefile Linux 6.12.65 2026-01-11 15:25:22 +01:00
README README: Fix spelling 2024-03-18 03:36:32 -06:00

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 reStructuredText 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.