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| author | Adrian Hunter <adrian.hunter@intel.com> | 2021-10-18 18:10:04 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2021-10-18 23:19:44 -0400 |
| commit | 4e5483b8440d01f6851a1388801088a6e0da0b56 (patch) | |
| tree | b4a3bf23af94be01af211abc75890b1d64706c89 /drivers/tty/serial | |
| parent | 4a8f71014b4d56c4fb287607e844c0a9f68f46d9 (diff) | |
| download | lwn-4e5483b8440d01f6851a1388801088a6e0da0b56.tar.gz lwn-4e5483b8440d01f6851a1388801088a6e0da0b56.zip | |
scsi: ufs: ufs-pci: Force a full restore after suspend-to-disk
Implement the ->restore() PM operation and set the link to off, which will
force a full reset and restore. This ensures that Host Performance Booster
is reset after suspend-to-disk.
The Host Performance Booster feature caches logical-to-physical mapping
information in the host memory. After suspend-to-disk, such information is
not valid, so a full reset and restore is needed.
A full reset and restore is done if the SPM level is 5 or 6, but not for
other SPM levels, so this change fixes those cases.
A full reset and restore also restores base address registers, so that code
is removed.
Link: https://lore.kernel.org/r/20211018151004.284200-2-adrian.hunter@intel.com
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/tty/serial')
0 files changed, 0 insertions, 0 deletions