From: Bart Van Assche bvanassche@acm.org
[ Upstream commit 549e91a9bbaa0ee480f59357868421a61d369770 ]
ufshcd_queuecommand() may be called two times in a row for a SCSI command before it is completed. Hence make the following changes:
- In the functions that submit a command, do not check the old value of lrbp->cmd nor clear lrbp->cmd in error paths.
- In ufshcd_release_scsi_cmd(), do not clear lrbp->cmd.
See also scsi_send_eh_cmnd().
This commit prevents that the following appears if a command times out:
WARNING: at drivers/ufs/core/ufshcd.c:2965 ufshcd_queuecommand+0x6f8/0x9a8 Call trace: ufshcd_queuecommand+0x6f8/0x9a8 scsi_send_eh_cmnd+0x2c0/0x960 scsi_eh_test_devices+0x100/0x314 scsi_eh_ready_devs+0xd90/0x114c scsi_error_handler+0x2b4/0xb70 kthread+0x16c/0x1e0
Fixes: 5a0b0cb9bee7 ("[SCSI] ufs: Add support for sending NOP OUT UPIU") Signed-off-by: Bart Van Assche bvanassche@acm.org Link: https://lore.kernel.org/r/20230524203659.1394307-3-bvanassche@acm.org Acked-by: Adrian Hunter adrian.hunter@intel.com Signed-off-by: Martin K. Petersen martin.petersen@oracle.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/ufs/core/ufshcd.c | 7 +------ 1 file changed, 1 insertion(+), 6 deletions(-)
diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c index 8bf39a83ecd7f..dc63bd60db77d 100644 --- a/drivers/ufs/core/ufshcd.c +++ b/drivers/ufs/core/ufshcd.c @@ -2917,7 +2917,6 @@ static int ufshcd_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd) (hba->clk_gating.state != CLKS_ON));
lrbp = &hba->lrb[tag]; - WARN_ON(lrbp->cmd); lrbp->cmd = cmd; lrbp->task_tag = tag; lrbp->lun = ufshcd_scsi_to_upiu_lun(cmd->device->lun); @@ -2933,7 +2932,6 @@ static int ufshcd_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd)
err = ufshcd_map_sg(hba, lrbp); if (err) { - lrbp->cmd = NULL; ufshcd_release(hba); goto out; } @@ -3152,7 +3150,7 @@ static int ufshcd_exec_dev_cmd(struct ufs_hba *hba, down_read(&hba->clk_scaling_lock);
lrbp = &hba->lrb[tag]; - WARN_ON(lrbp->cmd); + lrbp->cmd = NULL; err = ufshcd_compose_dev_cmd(hba, lrbp, cmd_type, tag); if (unlikely(err)) goto out; @@ -5391,7 +5389,6 @@ static void ufshcd_release_scsi_cmd(struct ufs_hba *hba, struct scsi_cmnd *cmd = lrbp->cmd;
scsi_dma_unmap(cmd); - lrbp->cmd = NULL; /* Mark the command as completed. */ ufshcd_release(hba); ufshcd_clk_scaling_update_busy(hba); } @@ -7006,7 +7003,6 @@ static int ufshcd_issue_devman_upiu_cmd(struct ufs_hba *hba, down_read(&hba->clk_scaling_lock);
lrbp = &hba->lrb[tag]; - WARN_ON(lrbp->cmd); lrbp->cmd = NULL; lrbp->task_tag = tag; lrbp->lun = 0; @@ -7178,7 +7174,6 @@ int ufshcd_advanced_rpmb_req_handler(struct ufs_hba *hba, struct utp_upiu_req *r down_read(&hba->clk_scaling_lock);
lrbp = &hba->lrb[tag]; - WARN_ON(lrbp->cmd); lrbp->cmd = NULL; lrbp->task_tag = tag; lrbp->lun = UFS_UPIU_RPMB_WLUN;