From: Adrian Hunter <adrian.hunter@xxxxxxxxx> [ Upstream commit 9b5ac8ab4e8bf5636d1d425aee68ddf45af12057 ] Samsung KLUFG8RHDA-B2D1 does not clear the unit attention condition if the length is zero. So go back to requesting all the sense data, as it was before patch "scsi: ufs: Request sense data asynchronously". That is simpler than creating and maintaining a quirk for affected devices. Link: https://lore.kernel.org/r/20210824114150.2105-1-adrian.hunter@xxxxxxxxx Signed-off-by: Adrian Hunter <adrian.hunter@xxxxxxxxx> Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/scsi/ufs/ufshcd.c | 36 +++++++++++++++++++++++++++++------- 1 file changed, 29 insertions(+), 7 deletions(-) diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index 1f0980a70e3f..dcd1eeb2b0e0 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -7787,7 +7787,8 @@ static int ufshcd_add_lus(struct ufs_hba *hba) static void ufshcd_request_sense_done(struct request *rq, blk_status_t error) { if (error != BLK_STS_OK) - pr_err("%s: REQUEST SENSE failed (%d)", __func__, error); + pr_err("%s: REQUEST SENSE failed (%d)\n", __func__, error); + kfree(rq->end_io_data); blk_put_request(rq); } @@ -7795,16 +7796,30 @@ static int ufshcd_request_sense_async(struct ufs_hba *hba, struct scsi_device *sdev) { /* - * From SPC-6: the REQUEST SENSE command with any allocation length - * clears the sense data. + * Some UFS devices clear unit attention condition only if the sense + * size used (UFS_SENSE_SIZE in this case) is non-zero. */ - static const u8 cmd[6] = {REQUEST_SENSE, 0, 0, 0, 0, 0}; + static const u8 cmd[6] = {REQUEST_SENSE, 0, 0, 0, UFS_SENSE_SIZE, 0}; struct scsi_request *rq; struct request *req; + char *buffer; + int ret; - req = blk_get_request(sdev->request_queue, REQ_OP_DRV_IN, /*flags=*/0); - if (IS_ERR(req)) - return PTR_ERR(req); + buffer = kzalloc(UFS_SENSE_SIZE, GFP_KERNEL); + if (!buffer) + return -ENOMEM; + + req = blk_get_request(sdev->request_queue, REQ_OP_DRV_IN, + /*flags=*/BLK_MQ_REQ_PM); + if (IS_ERR(req)) { + ret = PTR_ERR(req); + goto out_free; + } + + ret = blk_rq_map_kern(sdev->request_queue, req, + buffer, UFS_SENSE_SIZE, GFP_NOIO); + if (ret) + goto out_put; rq = scsi_req(req); rq->cmd_len = ARRAY_SIZE(cmd); @@ -7812,10 +7827,17 @@ ufshcd_request_sense_async(struct ufs_hba *hba, struct scsi_device *sdev) rq->retries = 3; req->timeout = 1 * HZ; req->rq_flags |= RQF_PM | RQF_QUIET; + req->end_io_data = buffer; blk_execute_rq_nowait(/*bd_disk=*/NULL, req, /*at_head=*/true, ufshcd_request_sense_done); return 0; + +out_put: + blk_put_request(req); +out_free: + kfree(buffer); + return ret; } static int ufshcd_clear_ua_wlun(struct ufs_hba *hba, u8 wlun) -- 2.30.2
