scsi: ufs: Allow an error return value from ->device_reset()

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It is simpler for drivers to provide a ->device_reset() callback
irrespective of whether the GPIO, or firmware interface necessary to do the
reset, is discovered during probe.

Change ->device_reset() to return an error code.  Drivers that provide the
callback, but do not do the reset operation should return -EOPNOTSUPP.

Link: https://lore.kernel.org/r/20201103141403.2142-3-adrian.hunter@intel.com
Reviewed-by: Asutosh Das <asutoshd@codeaurora.org>
Reviewed-by: Stanley Chu <stanley.chu@mediatek.com>
Reviewed-by: Bean huo <beanhuo@micron.com>
Reviewed-by: Can Guo <cang@codeaurora.org>
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

...

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Adrian Hunter 2020-11-03 16:14:03 +02:00 • committed by Martin K. Petersen

parent fe1d4c2ebc

commit 151f1b664f

3 changed files with 14 additions and 7 deletions

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4

drivers/scsi/ufs/ufs-mediatek.c

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6

drivers/scsi/ufs/ufs-qcom.c

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11

drivers/scsi/ufs/ufshcd.h

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