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| author | Adrian Hunter <adrian.hunter@intel.com> | 2025-10-24 11:59:15 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-11-13 23:37:47 +0300 |
| commit | 9ab4cf7a9405f0a631de70a7a7b3ec6853f416e5 (patch) | |
| tree | bf8025c75f81d567ef1d23c246c668d4b148b4df /scripts/gdb/linux/utils.py | |
| parent | 798983faa23308098a3b51287ab62d0437c994bd (diff) | |
| download | linux-9ab4cf7a9405f0a631de70a7a7b3ec6853f416e5.tar.xz | |
scsi: ufs: ufs-pci: Fix S0ix/S3 for Intel controllers
commit bb44826c3bdbf1fa3957008a04908f45e5666463 upstream.
Intel platforms with UFS, can support Suspend-to-Idle (S0ix) and
Suspend-to-RAM (S3). For S0ix the link state should be HIBERNATE. For
S3, state is lost, so the link state must be OFF. Driver policy,
expressed by spm_lvl, can be 3 (link HIBERNATE, device SLEEP) for S0ix
but must be changed to 5 (link OFF, device POWEROFF) for S3.
Fix support for S0ix/S3 by switching spm_lvl as needed. During suspend
->prepare(), if the suspend target state is not Suspend-to-Idle, ensure
the spm_lvl is at least 5 to ensure that resume will be possible from
deep sleep states. During suspend ->complete(), restore the spm_lvl to
its original value that is suitable for S0ix.
This fix is first needed in Intel Alder Lake based 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/20251024085918.31825-2-adrian.hunter@intel.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'scripts/gdb/linux/utils.py')
0 files changed, 0 insertions, 0 deletions