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| author | Mike Christie <michael.christie@oracle.com> | 2021-02-27 10:59:51 -0600 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2021-03-04 17:37:01 -0500 |
| commit | 12340930a3e10a3bec110f808be9eeb301969abf (patch) | |
| tree | dd4724840a68d8ba7a03bc6c5b453202e312afc1 /drivers/usb | |
| parent | c7e086b8d7539f1eafa7748e9c1c19bf33dd269f (diff) | |
| download | linux-stable-12340930a3e10a3bec110f808be9eeb301969abf.tar.gz linux-stable-12340930a3e10a3bec110f808be9eeb301969abf.tar.bz2 linux-stable-12340930a3e10a3bec110f808be9eeb301969abf.zip | |
scsi: target: usb: gadget: Convert to new submission API
target_submit_cmd() is now only for simple drivers that do their own sync
during shutdown and do not use target_stop_session(). It will never return
a failure, so we can remove that code from the driver.
Note: Before these patches target_submit_cmd() would never return an error
for usb since it does not use target_stop_session(). If it did then we
would have hit a refcount error here:
transport_send_check_condition_and_sense(se_cmd,
TCM_UNSUPPORTED_SCSI_OPCODE, 1);
transport_generic_free_cmd(&cmd->se_cmd, 0);
transport_send_check_condition_and_sense() calls queue_status and the
driver can sometimes do transport_generic_free_cmd() from there via
uasp_status_data_cmpl(). In that case, the above
transport_generic_free_cmd() would then hit a refcount error.
So that other use of the above error path in the driver is also probably
wrong, but someone with the hardware needs to fix that.
Link: https://lore.kernel.org/r/20210227170006.5077-11-michael.christie@oracle.com
Cc: Felipe Balbi <balbi@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Mike Christie <michael.christie@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/gadget/function/f_tcm.c | 16 |
1 files changed, 6 insertions, 10 deletions
diff --git a/drivers/usb/gadget/function/f_tcm.c b/drivers/usb/gadget/function/f_tcm.c index dcce6e2605f5..7acb507946e6 100644 --- a/drivers/usb/gadget/function/f_tcm.c +++ b/drivers/usb/gadget/function/f_tcm.c @@ -1058,11 +1058,9 @@ static void usbg_cmd_work(struct work_struct *work) goto out; } - if (target_submit_cmd(se_cmd, tv_nexus->tvn_se_sess, cmd->cmd_buf, - cmd->sense_iu.sense, cmd->unpacked_lun, 0, - cmd->prio_attr, dir, flags) < 0) - goto out; - + target_submit_cmd(se_cmd, tv_nexus->tvn_se_sess, cmd->cmd_buf, + cmd->sense_iu.sense, cmd->unpacked_lun, 0, + cmd->prio_attr, dir, flags); return; out: @@ -1189,11 +1187,9 @@ static void bot_cmd_work(struct work_struct *work) goto out; } - if (target_submit_cmd(se_cmd, tv_nexus->tvn_se_sess, - cmd->cmd_buf, cmd->sense_iu.sense, cmd->unpacked_lun, - cmd->data_len, cmd->prio_attr, dir, 0) < 0) - goto out; - + target_submit_cmd(se_cmd, tv_nexus->tvn_se_sess, + cmd->cmd_buf, cmd->sense_iu.sense, cmd->unpacked_lun, + cmd->data_len, cmd->prio_attr, dir, 0); return; out: |