From: Gilad Broner <gbro...@codeaurora.org>
On certain error conditions request abort task itself might fail
when aborting a request. In such case, subsequent request aborts
should skip issuing the abort task as it is expected to fail as well,
and device reset handler will be called next.
Signed-off-by: Gilad Broner <gbro...@codeaurora.org>
Signed-off-by: Subhash Jadavani <subha...@codeaurora.org>
---
drivers/scsi/ufs/ufshcd.c | 20 ++++++++++++++++++++
drivers/scsi/ufs/ufshcd.h | 3 +++
2 files changed, 23 insertions(+)
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index a70bf06..61fea17 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -1877,6 +1877,7 @@ static int ufshcd_queuecommand(struct Scsi_Host *host,
struct scsi_cmnd *cmd)
lrbp->task_tag = tag;
lrbp->lun = ufshcd_scsi_to_upiu_lun(cmd->device->lun);
lrbp->intr_cmd = !ufshcd_is_intr_aggr_allowed(hba) ? true : false;
+ lrbp->req_abort_skip = false;
ufshcd_comp_scsi_upiu(hba, lrbp);
@@ -4979,6 +4980,17 @@ static int ufshcd_eh_device_reset_handler(struct
scsi_cmnd *cmd)
return err;
}
+static void ufshcd_set_req_abort_skip(struct ufs_hba *hba, unsigned long
bitmap)
+{
+ struct ufshcd_lrb *lrbp;
+ int tag;
+
+ for_each_set_bit(tag, &bitmap, hba->nutrs) {
+ lrbp = &hba->lrb[tag];
+ lrbp->req_abort_skip = true;
+ }
+}
+
/**
* ufshcd_abort - abort a specific command
* @cmd: SCSI command pointer
@@ -5047,6 +5059,13 @@ static int ufshcd_abort(struct scsi_cmnd *cmd)
ufshcd_print_pwr_info(hba);
ufshcd_print_trs(hba, 1 << tag, true);
+
+ /* Skip task abort in case previous aborts failed and report failure */
+ if (lrbp->req_abort_skip) {
+ err = -EIO;
+ goto out;
+ }
+
for (poll_cnt = 100; poll_cnt; poll_cnt--) {
err = ufshcd_issue_tm_cmd(hba, lrbp->lun, lrbp->task_tag,
UFS_QUERY_TASK, &resp);
@@ -5120,6 +5139,7 @@ static int ufshcd_abort(struct scsi_cmnd *cmd)
err = SUCCESS;
} else {
dev_err(hba->dev, "%s: failed with err %d\n", __func__, err);
+ ufshcd_set_req_abort_skip(hba, hba->outstanding_reqs);
err = FAILED;
}
diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
index 7ffcde2..292fc14 100644
--- a/drivers/scsi/ufs/ufshcd.h
+++ b/drivers/scsi/ufs/ufshcd.h
@@ -165,6 +165,7 @@ struct ufs_pm_lvl_states {
* @lun: LUN of the command
* @intr_cmd: Interrupt command (doesn't participate in interrupt aggregation)
* @issue_time_stamp: time stamp for debug purposes
+ * @req_abort_skip: skip request abort task flag
*/
struct ufshcd_lrb {
struct utp_transfer_req_desc *utr_descriptor_ptr;
@@ -187,6 +188,8 @@ struct ufshcd_lrb {
u8 lun; /* UPIU LUN id field is only 8-bit wide */
bool intr_cmd;
ktime_t issue_time_stamp;
+
+ bool req_abort_skip;
};
/**
--
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