Adrian Hunter 47bf4ef2d0 scsi: ufs: ufs-pci: Fix default runtime and system PM levels ...

commit 6de7435e6b upstream.

Intel MTL-like host controllers support auto-hibernate.  Using
auto-hibernate with manual (driver initiated) hibernate produces more
complex operation.  For example, the host controller will have to exit
auto-hibernate simply to allow the driver to enter hibernate state
manually.  That is not recommended.

The default rpm_lvl and spm_lvl is 3, which includes manual hibernate.

Change the default values to 2, which does not.

Note, to be simpler to backport to stable kernels, utilize the UFS PCI
driver's ->late_init() call back.  Recent commits have made it possible
to set up a controller-specific default in the regular ->init() call
back, but not all stable kernels have those changes.

Fixes: 4049f7acef ("scsi: ufs: ufs-pci: Add support for Intel MTL")
Cc: stable@vger.kernel.org
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/20250723165856.145750-3-adrian.hunter@intel.com
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2025-08-28 16:30:57 +02:00

..

core

scsi: ufs: core: Use link recovery when h8 exit fails during runtime resume

2025-08-15 12:14:03 +02:00

host

scsi: ufs: ufs-pci: Fix default runtime and system PM levels

2025-08-28 16:30:57 +02:00

Kconfig

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Makefile

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