diff options
Diffstat (limited to 'drivers/scsi/st.c')
| -rw-r--r-- | drivers/scsi/st.c | 27 |
1 files changed, 21 insertions, 6 deletions
diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c index 084a967b2e78..390689d5fdf3 100644 --- a/drivers/scsi/st.c +++ b/drivers/scsi/st.c @@ -537,6 +537,8 @@ st_do_scsi(struct st_request * SRpnt, struct scsi_tape * STp, unsigned char *cmd int bytes, int direction, int timeout, int retries, int do_wait) { struct completion *waiting; + struct rq_map_data *mdata = &STp->buffer->map_data; + int ret; /* if async, make sure there's no command outstanding */ if (!do_wait && ((STp->buffer)->last_SRpnt)) { @@ -564,21 +566,34 @@ st_do_scsi(struct st_request * SRpnt, struct scsi_tape * STp, unsigned char *cmd init_completion(waiting); SRpnt->waiting = waiting; - if (!STp->buffer->do_dio) + if (!STp->buffer->do_dio) { buf_to_sg(STp->buffer, bytes); + mdata->nr_entries = + DIV_ROUND_UP(bytes, PAGE_SIZE << mdata->page_order); + STp->buffer->map_data.pages = STp->buffer->reserved_pages; + STp->buffer->map_data.offset = 0; + } + memcpy(SRpnt->cmd, cmd, sizeof(SRpnt->cmd)); STp->buffer->cmdstat.have_sense = 0; STp->buffer->syscall_result = 0; - if (scsi_execute_async(STp->device, cmd, COMMAND_SIZE(cmd[0]), direction, - &((STp->buffer)->sg[0]), bytes, (STp->buffer)->sg_segs, - timeout, retries, SRpnt, st_sleep_done, GFP_KERNEL)) { + if (STp->buffer->do_dio) + ret = scsi_execute_async(STp->device, cmd, COMMAND_SIZE(cmd[0]), + direction, &((STp->buffer)->sg[0]), + bytes, (STp->buffer)->sg_segs, timeout, + retries, SRpnt, st_sleep_done, + GFP_KERNEL); + else + ret = st_scsi_execute(SRpnt, cmd, direction, NULL, bytes, + timeout, retries); + + if (ret) { /* could not allocate the buffer or request was too large */ (STp->buffer)->syscall_result = (-EBUSY); (STp->buffer)->last_SRpnt = NULL; - } - else if (do_wait) { + } else if (do_wait) { wait_for_completion(waiting); SRpnt->waiting = NULL; (STp->buffer)->syscall_result = st_chk_result(STp, SRpnt); |