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Date: Fri, 23 Feb 2024 00:54:41 +0800 X-ASG-Orig-Subj: [PATCH] USB:UAS:return ENODEV when submit urbs fail with device not attached. Message-ID: <20240222165441.6148-1-WeitaoWang-oc@zhaoxin.com> X-Mailer: git-send-email 2.32.0 Precedence: bulk X-Mailing-List: linux-scsi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: zxbjmbx1.zhaoxin.com (10.29.252.163) To zxbjmbx1.zhaoxin.com (10.29.252.163) X-Barracuda-Connect: ZXSHMBX2.zhaoxin.com[10.28.252.164] X-Barracuda-Start-Time: 1708592081 X-Barracuda-Encrypted: ECDHE-RSA-AES128-GCM-SHA256 X-Barracuda-URL: https://10.28.252.36:4443/cgi-mod/mark.cgi X-Virus-Scanned: by bsmtpd at zhaoxin.com X-Barracuda-Scan-Msg-Size: 4195 X-Barracuda-BRTS-Status: 1 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Spam-Score: 1.09 X-Barracuda-Spam-Status: No, SCORE=1.09 using global scores of TAG_LEVEL=1000.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=9.0 tests=DATE_IN_FUTURE_06_12, DATE_IN_FUTURE_06_12_2 X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.3.121168 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.01 DATE_IN_FUTURE_06_12 Date: is 6 to 12 hours after Received: date 3.10 DATE_IN_FUTURE_06_12_2 DATE_IN_FUTURE_06_12_2 In the scenario of entering hibernation with udisk in the system, if the udisk was gone or resume fail in the thaw phase of hibernation. Its state will be set to NOTATTACHED. However, usb_hub_wq was already freezed and can't not handle disconnect event. Then, sync cache SCSI command will be sent to this udisk on the poweroff phase of hibernation, that will cause uas_submit_urbs to be called to submit URB to sense/data/cmd pipe. Then, usb_submit_urb return value -ENODEV when device was set to NOTATTACHED state. However, uas_submit_urbs always return "SCSI_MLQUEUE_DEVICE_BUSY" regardless of the reason for submission failure.That will lead the SCSI layer go into an ugly loop and system fail to go into hibernation. To fix this issue, let uas_submit_urbs function to return real error -ENODEV when submit URB with device in the NOTATTACHED state. In the error checking inside of function uas_queuecommand_lck, reporting DID_ERROR will cause device poweroff fail and system shutdown instead of entering hibernation. So,replace DID_ERROR with DID_NO_CONNECT to report to SCSI upper layer. Signed-off-by: Weitao Wang --- drivers/usb/storage/uas.c | 21 ++++++++++----------- 1 file changed, 10 insertions(+), 11 deletions(-) diff --git a/drivers/usb/storage/uas.c b/drivers/usb/storage/uas.c index 9707f53cfda9..967f18db525a 100644 --- a/drivers/usb/storage/uas.c +++ b/drivers/usb/storage/uas.c @@ -533,7 +533,7 @@ static struct urb *uas_alloc_cmd_urb(struct uas_dev_info *devinfo, gfp_t gfp, * daft to me. */ -static struct urb *uas_submit_sense_urb(struct scsi_cmnd *cmnd, gfp_t gfp) +static int uas_submit_sense_urb(struct scsi_cmnd *cmnd, gfp_t gfp) { struct uas_dev_info *devinfo = cmnd->device->hostdata; struct urb *urb; @@ -541,16 +541,15 @@ static struct urb *uas_submit_sense_urb(struct scsi_cmnd *cmnd, gfp_t gfp) urb = uas_alloc_sense_urb(devinfo, gfp, cmnd); if (!urb) - return NULL; + return -ENOMEM; usb_anchor_urb(urb, &devinfo->sense_urbs); err = usb_submit_urb(urb, gfp); if (err) { usb_unanchor_urb(urb); uas_log_cmd_state(cmnd, "sense submit err", err); usb_free_urb(urb); - return NULL; } - return urb; + return err; } static int uas_submit_urbs(struct scsi_cmnd *cmnd, @@ -562,9 +561,9 @@ static int uas_submit_urbs(struct scsi_cmnd *cmnd, lockdep_assert_held(&devinfo->lock); if (cmdinfo->state & SUBMIT_STATUS_URB) { - urb = uas_submit_sense_urb(cmnd, GFP_ATOMIC); - if (!urb) - return SCSI_MLQUEUE_DEVICE_BUSY; + err = uas_submit_sense_urb(cmnd, GFP_ATOMIC); + if (err) + return (err == -ENODEV) ? -ENODEV : SCSI_MLQUEUE_DEVICE_BUSY; cmdinfo->state &= ~SUBMIT_STATUS_URB; } @@ -582,7 +581,7 @@ static int uas_submit_urbs(struct scsi_cmnd *cmnd, if (err) { usb_unanchor_urb(cmdinfo->data_in_urb); uas_log_cmd_state(cmnd, "data in submit err", err); - return SCSI_MLQUEUE_DEVICE_BUSY; + return (err == -ENODEV) ? -ENODEV : SCSI_MLQUEUE_DEVICE_BUSY; } cmdinfo->state &= ~SUBMIT_DATA_IN_URB; cmdinfo->state |= DATA_IN_URB_INFLIGHT; @@ -602,7 +601,7 @@ static int uas_submit_urbs(struct scsi_cmnd *cmnd, if (err) { usb_unanchor_urb(cmdinfo->data_out_urb); uas_log_cmd_state(cmnd, "data out submit err", err); - return SCSI_MLQUEUE_DEVICE_BUSY; + return (err == -ENODEV) ? -ENODEV : SCSI_MLQUEUE_DEVICE_BUSY; } cmdinfo->state &= ~SUBMIT_DATA_OUT_URB; cmdinfo->state |= DATA_OUT_URB_INFLIGHT; @@ -621,7 +620,7 @@ static int uas_submit_urbs(struct scsi_cmnd *cmnd, if (err) { usb_unanchor_urb(cmdinfo->cmd_urb); uas_log_cmd_state(cmnd, "cmd submit err", err); - return SCSI_MLQUEUE_DEVICE_BUSY; + return (err == -ENODEV) ? -ENODEV : SCSI_MLQUEUE_DEVICE_BUSY; } cmdinfo->cmd_urb = NULL; cmdinfo->state &= ~SUBMIT_CMD_URB; @@ -698,7 +697,7 @@ static int uas_queuecommand_lck(struct scsi_cmnd *cmnd) * of queueing, no matter how fatal the error */ if (err == -ENODEV) { - set_host_byte(cmnd, DID_ERROR); + set_host_byte(cmnd, DID_NO_CONNECT); scsi_done(cmnd); goto zombie; }