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scsi: ufs: Correct the LUN used in eh_device_reset_handler() callback 

Users can initiate resets to specific SCSI device/target/host through
IOCTL. When this happens, the SCSI cmd passed to eh_device/target/host
_reset_handler() callbacks is initialized with a request whose tag is -1.
In this case it is not right for eh_device_reset_handler() callback to
count on the LUN get from hba->lrb[-1]. Fix it by getting LUN from the SCSI
device associated with the SCSI cmd.

Link: https://lore.kernel.org/r/1609157080-26283-1-git-send-email-cang@codeaurora.org
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Reviewed-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Can Guo <cang@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
master
Can Guo 2020-12-28 04:04:36 -08:00 committed by Martin K. Petersen
parent 6948a96a0d
commit 35fc4cd344
1 changed files with 4 additions and 7 deletions
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11
drivers/scsi/ufs/ufshcd.c
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@ -6659,19 +6659,16 @@ static int ufshcd_eh_device_reset_handler(struct scsi_cmnd *cmd)
{
struct Scsi_Host *host;
struct ufs_hba *hba;
unsigned int tag;
u32 pos;
int err;
u8 resp = 0xF;
struct ufshcd_lrb *lrbp;
u8 resp = 0xF, lun;
unsigned long flags;
host = cmd->device->host;
hba = shost_priv(host);
tag = cmd->request->tag;
lrbp = &hba->lrb[tag];
err = ufshcd_issue_tm_cmd(hba, lrbp->lun, 0, UFS_LOGICAL_RESET, &resp);
lun = ufshcd_scsi_to_upiu_lun(cmd->device->lun);
err = ufshcd_issue_tm_cmd(hba, lun, 0, UFS_LOGICAL_RESET, &resp);
if (err || resp != UPIU_TASK_MANAGEMENT_FUNC_COMPL) {
if (!err)
err = resp;
@ -6680,7 +6677,7 @@ static int ufshcd_eh_device_reset_handler(struct scsi_cmnd *cmd)
/* clear the commands that were pending for corresponding LUN */
for_each_set_bit(pos, &hba->outstanding_reqs, hba->nutrs) {
if (hba->lrb[pos].lun == lrbp->lun) {
if (hba->lrb[pos].lun == lun) {
err = ufshcd_clear_cmd(hba, pos);
if (err)
break;