Handle usb-device resets not triggered from uas_eh_bus_reset_handler(), when
this happens, disable cmd queuing during the reset, and wait for existing
requests to finish in pre_reset.
Signed-off-by: Hans de Goede <hdego...@redhat.com>
---
drivers/usb/storage/uas.c | 47 ++++++++++++++++++++++++++++++++++++++++++-----
1 file changed, 42 insertions(+), 5 deletions(-)
diff --git a/drivers/usb/storage/uas.c b/drivers/usb/storage/uas.c
index 92fa51c..9969632 100644
--- a/drivers/usb/storage/uas.c
+++ b/drivers/usb/storage/uas.c
@@ -18,6 +18,7 @@
#include <linux/usb/uas.h>
#include <scsi/scsi.h>
+#include <scsi/scsi_eh.h>
#include <scsi/scsi_dbg.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
@@ -820,10 +821,7 @@ static int uas_eh_bus_reset_handler(struct scsi_cmnd *cmnd)
usb_kill_anchored_urbs(&devinfo->sense_urbs);
usb_kill_anchored_urbs(&devinfo->data_urbs);
uas_zap_dead(devinfo);
- uas_free_streams(devinfo);
err = usb_reset_device(udev);
- if (!err)
- uas_configure_endpoints(devinfo);
devinfo->resetting = 0;
usb_unlock_device(udev);
@@ -1030,13 +1028,52 @@ set_alt0:
static int uas_pre_reset(struct usb_interface *intf)
{
-/* XXX: Need to return 1 if it's not our device in error handling */
+ struct Scsi_Host *shost = usb_get_intfdata(intf);
+ struct uas_dev_info *devinfo = (void *)shost->hostdata[0];
+ unsigned long flags;
+ int empty;
+
+ /* Block new requests */
+ spin_lock_irqsave(shost->host_lock, flags);
+ scsi_block_requests(shost);
+ spin_unlock_irqrestore(shost->host_lock, flags);
+
+ /* Flush work queue (uas_do_work is re-entrant safe) */
+ uas_do_work(&devinfo->work);
+ spin_lock_irqsave(&devinfo->lock, flags);
+ empty = list_empty(&devinfo->work_list);
+ spin_unlock_irqrestore(&devinfo->lock, flags);
+ if (!empty) {
+ shost_printk(KERN_ERR, shost,
+ "%s: flush work queue failed\n", __func__);
+ return 1;
+ }
+
+ /* Wait for any pending requests to complete */
+ if (usb_wait_anchor_empty_timeout(&devinfo->sense_urbs, 5000) == 0) {
+ shost_printk(KERN_ERR, shost, "%s: timed out\n", __func__);
+ return 1;
+ }
+
+ uas_free_streams(devinfo);
+
return 0;
}
static int uas_post_reset(struct usb_interface *intf)
{
-/* XXX: Need to return 1 if it's not our device in error handling */
+ struct Scsi_Host *shost = usb_get_intfdata(intf);
+ struct uas_dev_info *devinfo = (void *)shost->hostdata[0];
+ unsigned long flags;
+
+ uas_configure_endpoints(devinfo);
+
+ spin_lock_irqsave(shost->host_lock, flags);
+ scsi_report_bus_reset(shost, 0);
+ spin_unlock_irqrestore(shost->host_lock, flags);
+
+ scsi_unblock_requests(shost);
+
return 0;
}
--
1.8.3.1
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