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Revert "usb/uas: one only one status URB/host on stream-less connection"

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This reverts commit ceb3f91fd5.

IMO the real bug is assigning status urbs to scsi requests.  First there
is no such link in the non-stream case.  Also there isn't nessesarely a
scsi request in the first place, for example when submitting task
management requests.

This patch just papers over the real bug and introduces different status
urb handling in the stream/non-stream case for no good reason.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Gerd Hoffmann 2012-06-19 09:54:49 +02:00 committed by Greg Kroah-Hartman
parent c621a81ede
commit db32de11f7
1 changed files with 10 additions and 60 deletions
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70
drivers/usb/storage/uas.c
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@ -46,7 +46,6 @@ struct uas_dev_info {
unsigned use_streams:1;
unsigned uas_sense_old:1;
struct scsi_cmnd *cmnd;
struct urb *status_urb; /* used only if stream support is available */
};
enum {
@ -65,7 +64,6 @@ struct uas_cmd_info {
unsigned int state;
unsigned int stream;
struct urb *cmd_urb;
/* status_urb is used only if stream support isn't available */
struct urb *status_urb;
struct urb *data_in_urb;
struct urb *data_out_urb;
@ -129,6 +127,7 @@ static void uas_sense(struct urb *urb, struct scsi_cmnd *cmnd)
cmnd->result = sense_iu->status;
cmnd->scsi_done(cmnd);
usb_free_urb(urb);
}
static void uas_sense_old(struct urb *urb, struct scsi_cmnd *cmnd)
@ -153,6 +152,7 @@ static void uas_sense_old(struct urb *urb, struct scsi_cmnd *cmnd)
cmnd->result = sense_iu->status;
cmnd->scsi_done(cmnd);
usb_free_urb(urb);
}
static void uas_xfer_data(struct urb *urb, struct scsi_cmnd *cmnd,
@ -161,7 +161,7 @@ static void uas_xfer_data(struct urb *urb, struct scsi_cmnd *cmnd,
struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp;
int err;
cmdinfo->state = direction;
cmdinfo->state = direction | SUBMIT_STATUS_URB;
err = uas_submit_urbs(cmnd, cmnd->device->hostdata, GFP_ATOMIC);
if (err) {
spin_lock(&uas_work_lock);
@ -178,12 +178,10 @@ static void uas_stat_cmplt(struct urb *urb)
struct uas_dev_info *devinfo = (void *)shost->hostdata[0];
struct scsi_cmnd *cmnd;
u16 tag;
int ret;
if (urb->status) {
dev_err(&urb->dev->dev, "URB BAD STATUS %d\n", urb->status);
if (devinfo->use_streams)
usb_free_urb(urb);
usb_free_urb(urb);
return;
}
@ -193,13 +191,7 @@ static void uas_stat_cmplt(struct urb *urb)
else
cmnd = scsi_host_find_tag(shost, tag - 1);
if (!cmnd) {
if (devinfo->use_streams) {
usb_free_urb(urb);
return;
}
ret = usb_submit_urb(urb, GFP_ATOMIC);
if (ret)
dev_err(&urb->dev->dev, "failed submit status urb\n");
usb_free_urb(urb);
return;
}
@ -225,15 +217,6 @@ static void uas_stat_cmplt(struct urb *urb)
scmd_printk(KERN_ERR, cmnd,
"Bogus IU (%d) received on status pipe\n", iu->iu_id);
}
if (devinfo->use_streams) {
usb_free_urb(urb);
return;
}
ret = usb_submit_urb(urb, GFP_ATOMIC);
if (ret)
dev_err(&urb->dev->dev, "failed submit status urb\n");
}
static void uas_data_cmplt(struct urb *urb)
@ -264,7 +247,7 @@ static struct urb *uas_alloc_data_urb(struct uas_dev_info *devinfo, gfp_t gfp,
}
static struct urb *uas_alloc_sense_urb(struct uas_dev_info *devinfo, gfp_t gfp,
struct Scsi_Host *shost, u16 stream_id)
struct scsi_cmnd *cmnd, u16 stream_id)
{
struct usb_device *udev = devinfo->udev;
struct urb *urb = usb_alloc_urb(0, gfp);
@ -278,7 +261,7 @@ static struct urb *uas_alloc_sense_urb(struct uas_dev_info *devinfo, gfp_t gfp,
goto free;
usb_fill_bulk_urb(urb, udev, devinfo->status_pipe, iu, sizeof(*iu),
uas_stat_cmplt, shost);
uas_stat_cmplt, cmnd->device->host);
urb->stream_id = stream_id;
urb->transfer_flags |= URB_FREE_BUFFER;
out:
@ -340,8 +323,8 @@ static int uas_submit_urbs(struct scsi_cmnd *cmnd,
struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp;
if (cmdinfo->state & ALLOC_STATUS_URB) {
cmdinfo->status_urb = uas_alloc_sense_urb(devinfo, gfp,
cmnd->device->host, cmdinfo->stream);
cmdinfo->status_urb = uas_alloc_sense_urb(devinfo, gfp, cmnd,
cmdinfo->stream);
if (!cmdinfo->status_urb)
return SCSI_MLQUEUE_DEVICE_BUSY;
cmdinfo->state &= ~ALLOC_STATUS_URB;
@ -450,8 +433,7 @@ static int uas_queuecommand_lck(struct scsi_cmnd *cmnd,
}
if (!devinfo->use_streams) {
cmdinfo->state &= ~(SUBMIT_DATA_IN_URB | SUBMIT_DATA_OUT_URB |
ALLOC_STATUS_URB | SUBMIT_STATUS_URB);
cmdinfo->state &= ~(SUBMIT_DATA_IN_URB | SUBMIT_DATA_OUT_URB);
cmdinfo->stream = 0;
}
@ -662,29 +644,6 @@ static void uas_configure_endpoints(struct uas_dev_info *devinfo)
}
}
static int uas_alloc_status_urb(struct uas_dev_info *devinfo,
struct Scsi_Host *shost)
{
if (devinfo->use_streams) {
devinfo->status_urb = NULL;
return 0;
}
devinfo->status_urb = uas_alloc_sense_urb(devinfo, GFP_KERNEL,
shost, 0);
if (!devinfo->status_urb)
goto err_s_urb;
if (usb_submit_urb(devinfo->status_urb, GFP_KERNEL))
goto err_submit_urb;
return 0;
err_submit_urb:
usb_free_urb(devinfo->status_urb);
err_s_urb:
return -ENOMEM;
}
static void uas_free_streams(struct uas_dev_info *devinfo)
{
struct usb_device *udev = devinfo->udev;
@ -739,17 +698,10 @@ static int uas_probe(struct usb_interface *intf, const struct usb_device_id *id)
shost->hostdata[0] = (unsigned long)devinfo;
result = uas_alloc_status_urb(devinfo, shost);
if (result)
goto err_alloc_status;
scsi_scan_host(shost);
usb_set_intfdata(intf, shost);
return result;
err_alloc_status:
scsi_remove_host(shost);
shost = NULL;
deconfig_eps:
uas_free_streams(devinfo);
free:
@ -777,8 +729,6 @@ static void uas_disconnect(struct usb_interface *intf)
struct uas_dev_info *devinfo = (void *)shost->hostdata[0];
scsi_remove_host(shost);
usb_kill_urb(devinfo->status_urb);
usb_free_urb(devinfo->status_urb);
uas_free_streams(devinfo);
kfree(devinfo);
}