diff options
| author | Hans de Goede <hdegoede@redhat.com> | 2013-10-22 16:10:44 +0100 |
|---|---|---|
| committer | Sarah Sharp <sarah.a.sharp@linux.intel.com> | 2014-03-04 15:38:10 -0800 |
| commit | 4de7a3735bdc4219cf57a0d44f92c06d7127a211 (patch) | |
| tree | 561c7a364b96b45b457c3f24496021d53c4d31ae /drivers/usb/storage/uas.c | |
| parent | be326f4c9bdfdff8a85145fb89b0a44c4d20ebc6 (diff) | |
| download | linux-4de7a3735bdc4219cf57a0d44f92c06d7127a211.tar.gz | |
uas: Fix reset handling for externally triggered reset
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 <hdegoede@redhat.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Diffstat (limited to 'drivers/usb/storage/uas.c')
| -rw-r--r-- | drivers/usb/storage/uas.c | 36 |
1 files changed, 31 insertions, 5 deletions
diff --git a/drivers/usb/storage/uas.c b/drivers/usb/storage/uas.c index 36ef82a34131c..0ee5a05c0a7ba 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> @@ -818,10 +819,7 @@ 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); @@ -1055,13 +1053,41 @@ 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; + + /* Block new requests */ + spin_lock_irqsave(shost->host_lock, flags); + scsi_block_requests(shost); + spin_unlock_irqrestore(shost->host_lock, flags); + + /* Wait for any pending requests to complete */ + flush_work(&devinfo->work); + 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; } |