]> git.ipfire.org Git - thirdparty/kernel/linux.git/commit
scsi: ufs: core: Add a quirk to suppress link_startup_again
authorAdrian Hunter <adrian.hunter@intel.com>
Fri, 24 Oct 2025 08:59:16 +0000 (11:59 +0300)
committerMartin K. Petersen <martin.petersen@oracle.com>
Thu, 30 Oct 2025 03:20:19 +0000 (23:20 -0400)
commitd34caa89a132cd69efc48361d4772251546fdb88
tree707526d82d0e75741549e49bddd05c590b8a809c
parentbb44826c3bdbf1fa3957008a04908f45e5666463
scsi: ufs: core: Add a quirk to suppress link_startup_again

ufshcd_link_startup() has a facility (link_startup_again) to issue
DME_LINKSTARTUP a 2nd time even though the 1st time was successful.

Some older hardware benefits from that, however the behaviour is
non-standard, and has been found to cause link startup to be unreliable
for some Intel Alder Lake based host controllers.

Add UFSHCD_QUIRK_PERFORM_LINK_STARTUP_ONCE to suppress
link_startup_again, in preparation for setting the quirk for affected
controllers.

Fixes: 7dc9fb47bc9a ("scsi: ufs: ufs-pci: Add support for Intel ADL")
Cc: stable@vger.kernel.org
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Link: https://patch.msgid.link/20251024085918.31825-3-adrian.hunter@intel.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
drivers/ufs/core/ufshcd.c
include/ufs/ufshcd.h