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| author | Kiwoong Kim <kwmad.kim@samsung.com> | 2023-09-04 10:30:45 +0900 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2023-09-05 06:10:24 -0400 |
| commit | d32533d30e2119b0c0aa17596734f1f842f750df (patch) | |
| tree | e5009c3e8dde3944537d16af4f493e74273392f5 /drivers/vdpa | |
| parent | 2d3f59cf868b4a2dd678a96cd49bdd91411bd59f (diff) | |
| download | linux-stable-d32533d30e2119b0c0aa17596734f1f842f750df.tar.gz linux-stable-d32533d30e2119b0c0aa17596734f1f842f750df.tar.bz2 linux-stable-d32533d30e2119b0c0aa17596734f1f842f750df.zip | |
scsi: ufs: core: Poll HCS.UCRDY before issuing a UIC command
With auto hibern8 enabled, UIC could be busy processing a hibern8 operation
and the HCI would reports UIC not ready for a short while through
HCS.UCRDY. The UFS driver doesn't currently handle this situation. The
UFSHCI spec specifies UCRDY like this: whether the host controller is ready
to process UIC COMMAND
The 'ready' could be seen as many different meanings. If the meaning
includes not processing any request from HCI, processing a hibern8
operation can be 'not ready'. In this situation, the driver needs to wait
until the operations is completed.
Signed-off-by: Kiwoong Kim <kwmad.kim@samsung.com>
Link: https://lore.kernel.org/r/550484ffb66300bdcec63d3e304dfd55cb432f1f.1693790060.git.kwmad.kim@samsung.com
Reviewed-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Chanwoo Lee <cw9316.lee@samsung.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/vdpa')
0 files changed, 0 insertions, 0 deletions