[PATCH 3/4] ufs: Remove the SCSI timeout handler

Bart Van Assche
2019-10-31T22:55:40Z

Whether or not an UFS command gets requeued, one of the hba->lrb[].cmd
pointers will point at that command. In other words, the UFS SCSI timeout
handler will always return BLK_EH_DONE. Since always returning BLK_EH_DONE
has the same effect of not defining a timeout handler, remove the UFS SCSI
timeout handler.

See also commit f550c65b543b ("scsi: ufs: implement scsi host timeout handler").

Cc: Gilad Broner <gbroner@codeaurora.org>
Cc: Yaniv Gardi <ygardi@codeaurora.org>
Cc: Subhash Jadavani <subhashj@codeaurora.org>
Cc: Stanley Chu <stanley.chu@mediatek.com>
Cc: Avri Altman <avri.altman@wdc.com>
Cc: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
---
drivers/scsi/ufs/ufshcd.c | 36 ------------------------------------
1 file changed, 36 deletions(-)

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index b7e27d86a0ec..8c969fab5d92 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -6936,41 +6936,6 @@ static void ufshcd_async_scan(void *data, async_cookie_t cookie)
ufshcd_probe_hba(hba);
}

-static enum blk_eh_timer_return ufshcd_eh_timed_out(struct scsi_cmnd *scmd)
-{
- unsigned long flags;
- struct Scsi_Host *host;
- struct ufs_hba *hba;
- int index;
- bool found = false;
-
- if (!scmd || !scmd->device || !scmd->device->host)
- return BLK_EH_DONE;
-
- host = scmd->device->host;
- hba = shost_priv(host);
- if (!hba)
- return BLK_EH_DONE;
-
- spin_lock_irqsave(host->host_lock, flags);
-
- for_each_set_bit(index, &hba->outstanding_reqs, hba->nutrs) {
- if (hba->lrb[index].cmd == scmd) {
- found = true;
- break;
- }
- }
-
- spin_unlock_irqrestore(host->host_lock, flags);
-
- /*
- * Bypass SCSI error handling and reset the block layer timer if this
- * SCSI command was not actually dispatched to UFS driver, otherwise
- * let SCSI layer handle the error as usual.
- */
- return found ? BLK_EH_DONE : BLK_EH_RESET_TIMER;
-}
-
static const struct attribute_group *ufshcd_driver_groups[] = {
&ufs_sysfs_unit_descriptor_group,
&ufs_sysfs_lun_attributes_group,
@@ -6989,7 +6954,6 @@ static struct scsi_host_template ufshcd_driver_template = {
.eh_abort_handler = ufshcd_abort,
.eh_device_reset_handler = ufshcd_eh_device_reset_handler,
.eh_host_reset_handler = ufshcd_eh_host_reset_handler,
- .eh_timed_out = ufshcd_eh_timed_out,
.this_id = -1,
.sg_tablesize = SG_ALL,
.cmd_per_lun = UFSHCD_CMD_PER_LUN,
--
2.24.0.rc0.303.g954a862665-goog