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author | Gerd Hoffmann <kraxel@redhat.com> | 2012-06-19 07:54:50 (GMT) |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-06-25 18:50:59 (GMT) |
commit | e9bd7e1a2d34de3b0991c81080d56dc408110833 (patch) | |
tree | 9839c93d3d84ef4419a8c1585a55e7bab49736ee /drivers/usb/storage | |
parent | db32de11f75673c2a0f2651ae58b0f25b8c5b0eb (diff) | |
download | linux-fsl-qoriq-e9bd7e1a2d34de3b0991c81080d56dc408110833.tar.xz |
uas: fix sense urb handling
Stop reusing sense urbs, just allocate a fresh one each time and free it
when done.
Stop storing a sense urb pointer in the scsi request, all you can do
with it is misusing. For example requeuing the sense urb, then f*ck it
up by picking the wrong one in case tagged requests don't finish in the
same order you've submitted them. Also note that (not-yet supported)
task management ops don't have a scsi request in the first place.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/storage')
-rw-r--r-- | drivers/usb/storage/uas.c | 49 |
1 files changed, 28 insertions, 21 deletions
diff --git a/drivers/usb/storage/uas.c b/drivers/usb/storage/uas.c index 36279a4..b012738 100644 --- a/drivers/usb/storage/uas.c +++ b/drivers/usb/storage/uas.c @@ -49,7 +49,6 @@ struct uas_dev_info { }; enum { - ALLOC_STATUS_URB = (1 << 0), SUBMIT_STATUS_URB = (1 << 1), ALLOC_DATA_IN_URB = (1 << 2), SUBMIT_DATA_IN_URB = (1 << 3), @@ -64,7 +63,6 @@ struct uas_cmd_info { unsigned int state; unsigned int stream; struct urb *cmd_urb; - struct urb *status_urb; struct urb *data_in_urb; struct urb *data_out_urb; struct list_head list; @@ -127,7 +125,6 @@ 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) @@ -152,7 +149,6 @@ 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, @@ -217,6 +213,7 @@ static void uas_stat_cmplt(struct urb *urb) scmd_printk(KERN_ERR, cmnd, "Bogus IU (%d) received on status pipe\n", iu->iu_id); } + usb_free_urb(urb); } static void uas_data_cmplt(struct urb *urb) @@ -247,7 +244,7 @@ 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_cmnd *cmnd, u16 stream_id) + struct Scsi_Host *shost, u16 stream_id) { struct usb_device *udev = devinfo->udev; struct urb *urb = usb_alloc_urb(0, gfp); @@ -261,7 +258,7 @@ 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, cmnd->device->host); + uas_stat_cmplt, shost); urb->stream_id = stream_id; urb->transfer_flags |= URB_FREE_BUFFER; out: @@ -317,24 +314,35 @@ static struct urb *uas_alloc_cmd_urb(struct uas_dev_info *devinfo, gfp_t gfp, * daft to me. */ -static int uas_submit_urbs(struct scsi_cmnd *cmnd, - struct uas_dev_info *devinfo, gfp_t gfp) +static int uas_submit_sense_urb(struct Scsi_Host *shost, + gfp_t gfp, unsigned int stream) { - struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; + struct uas_dev_info *devinfo = (void *)shost->hostdata[0]; + struct urb *urb; - if (cmdinfo->state & ALLOC_STATUS_URB) { - 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; + urb = uas_alloc_sense_urb(devinfo, gfp, shost, stream); + if (!urb) + return SCSI_MLQUEUE_DEVICE_BUSY; + if (usb_submit_urb(urb, gfp)) { + shost_printk(KERN_INFO, shost, + "sense urb submission failure\n"); + usb_free_urb(urb); + return SCSI_MLQUEUE_DEVICE_BUSY; } + return 0; +} + +static int uas_submit_urbs(struct scsi_cmnd *cmnd, + struct uas_dev_info *devinfo, gfp_t gfp) +{ + struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; + int err; if (cmdinfo->state & SUBMIT_STATUS_URB) { - if (usb_submit_urb(cmdinfo->status_urb, gfp)) { - scmd_printk(KERN_INFO, cmnd, - "sense urb submission failure\n"); - return SCSI_MLQUEUE_DEVICE_BUSY; + err = uas_submit_sense_urb(cmnd->device->host, gfp, + cmdinfo->stream); + if (err) { + return err; } cmdinfo->state &= ~SUBMIT_STATUS_URB; } @@ -417,7 +425,7 @@ static int uas_queuecommand_lck(struct scsi_cmnd *cmnd, cmnd->scsi_done = done; - cmdinfo->state = ALLOC_STATUS_URB | SUBMIT_STATUS_URB | + cmdinfo->state = SUBMIT_STATUS_URB | ALLOC_CMD_URB | SUBMIT_CMD_URB; switch (cmnd->sc_data_direction) { @@ -441,7 +449,6 @@ static int uas_queuecommand_lck(struct scsi_cmnd *cmnd, if (err) { /* If we did nothing, give up now */ if (cmdinfo->state & SUBMIT_STATUS_URB) { - usb_free_urb(cmdinfo->status_urb); return SCSI_MLQUEUE_DEVICE_BUSY; } spin_lock(&uas_work_lock); |