diff options
| author | Bart Van Assche <[email protected]> | 2021-07-21 20:34:32 -0700 |
|---|---|---|
| committer | Martin K. Petersen <[email protected]> | 2021-08-02 21:43:58 -0400 |
| commit | 1f522c5049016cfea4f9d131ae9089e6fdba3980 (patch) | |
| tree | a3e34c741686ad55cc8137b424ee3d9f2595b7d7 /tools/perf/scripts/python/bin/stackcollapse-report | |
| parent | 815b9a27b0a3055585db37c422146067e55e0617 (diff) | |
scsi: ufs: Revert "Utilize Transfer Request List Completion Notification Register"
Using the UTRLCNR register involves two MMIO accesses in the hot path while
using the doorbell register only involves a single MMIO access. Since MMIO
accesses take time, do not use the UTRLCNR register. The spinlock
contention on the SCSI host lock that is reintroduced by this commit will
be addressed later.
This reverts commit 6f7151729647e58ac7c522081255fd0c07b38105.
Link: https://lore.kernel.org/r/[email protected]
Cc: Adrian Hunter <[email protected]>
Cc: Stanley Chu <[email protected]>
Cc: Can Guo <[email protected]>
Cc: Asutosh Das <[email protected]>
Cc: Avri Altman <[email protected]>
Tested-by: Bean Huo <[email protected]>
Signed-off-by: Bart Van Assche <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/bin/stackcollapse-report')
0 files changed, 0 insertions, 0 deletions