FROMGIT: scsi: ufs: Add checking lifetime attribute for WriteBooster
Because WB performs writes in SLC mode, it is not possible to use WriteBooster indefinitely. Vendors can set a lifetime limit in the device. If the lifetime exceeds this limit, the device ican disable the WB feature. The feature is defined in the "bWriteBoosterBufferLifeTimeEst (IDN = 1E)" attribute. With lifetime exceeding the limit value, the current driver continuously performs the following query: - Write Flag: WB_ENABLE / DISABLE - Read attr: Available Buffer Size - Read attr: Current Buffer Size This patch recognizes that WriteBooster is no longer supported by the device, and prevents unnecessary queries. Link: https://lore.kernel.org/r/1891546521.01643252701746.JavaMail.epsvc@epcpadp3 Reviewed-by:Asutosh Das <quic_asutoshd@quicinc.com> Acked-by:
Avri Altman <avri.altman@wdc.com> Signed-off-by:
Jinyoung Choi <j-young.choi@samsung.com> Signed-off-by:
Martin K. Petersen <martin.petersen@oracle.com> (cherry picked from commit f681d107 git://git.kernel.org/pub/scm/linux/kernel/git/mkp/scsi.git for-next) Bug: 204438323 Change-Id: I9178b31aaeb75ef157aa8e12b1dd0f5a646f0579 Signed-off-by:
Bart Van Assche <bvanassche@google.com>
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