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| author | Bart Van Assche <bvanassche@acm.org> | 2019-12-09 10:13:08 -0800 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2019-12-19 22:08:51 -0500 |
| commit | 7252a3603015f1fd04363956f4b72a537c9f9c42 (patch) | |
| tree | 8d021ec4d454f0ac237ca451ff26b1f3d9aedc16 /tools/perf/scripts/python | |
| parent | scsi: esp_scsi: Add support for FSC chip (diff) | |
| download | linux-7252a3603015f1fd04363956f4b72a537c9f9c42.tar.gz linux-7252a3603015f1fd04363956f4b72a537c9f9c42.zip | |
scsi: ufs: Avoid busy-waiting by eliminating tag conflicts
Instead of tracking which tags are in use in the ufs_hba.lrb_in_use
bitmask, rely on the block layer tag allocation mechanism. This patch
removes the following busy-waiting loop if ufshcd_issue_devman_upiu_cmd()
and the block layer accidentally allocate the same tag for a SCSI request:
* ufshcd_queuecommand() returns SCSI_MLQUEUE_HOST_BUSY.
* The SCSI core requeues the SCSI command.
Cc: Can Guo <cang@codeaurora.org>
Cc: Stanley Chu <stanley.chu@mediatek.com>
Cc: Avri Altman <avri.altman@wdc.com>
Cc: Tomas Winkler <tomas.winkler@intel.com>
Link: https://lore.kernel.org/r/20191209181309.196233-2-bvanassche@acm.org
Tested-by: Bean Huo <beanhuo@micron.com>
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'tools/perf/scripts/python')
0 files changed, 0 insertions, 0 deletions