diff options
Diffstat (limited to 'drivers/scsi/scsi_lib.c')
| -rw-r--r-- | drivers/scsi/scsi_lib.c | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index ecfbbd30dce5..f2f51e0333eb 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -183,13 +183,15 @@ int scsi_queue_insert(struct scsi_cmnd *cmd, int reason) * @timeout: request timeout in seconds * @retries: number of times to retry request * @flags: or into request flags; + * @resid: optional residual length * * returns the req->errors value which is the scsi_cmnd result * field. */ int scsi_execute(struct scsi_device *sdev, const unsigned char *cmd, int data_direction, void *buffer, unsigned bufflen, - unsigned char *sense, int timeout, int retries, int flags) + unsigned char *sense, int timeout, int retries, int flags, + int *resid) { struct request *req; int write = (data_direction == DMA_TO_DEVICE); @@ -224,6 +226,8 @@ int scsi_execute(struct scsi_device *sdev, const unsigned char *cmd, if (unlikely(req->data_len > 0 && req->data_len <= bufflen)) memset(buffer + (bufflen - req->data_len), 0, req->data_len); + if (resid) + *resid = req->data_len; ret = req->errors; out: blk_put_request(req); @@ -235,7 +239,8 @@ EXPORT_SYMBOL(scsi_execute); int scsi_execute_req(struct scsi_device *sdev, const unsigned char *cmd, int data_direction, void *buffer, unsigned bufflen, - struct scsi_sense_hdr *sshdr, int timeout, int retries) + struct scsi_sense_hdr *sshdr, int timeout, int retries, + int *resid) { char *sense = NULL; int result; @@ -246,7 +251,7 @@ int scsi_execute_req(struct scsi_device *sdev, const unsigned char *cmd, return DRIVER_ERROR << 24; } result = scsi_execute(sdev, cmd, data_direction, buffer, bufflen, - sense, timeout, retries, 0); + sense, timeout, retries, 0, resid); if (sshdr) scsi_normalize_sense(sense, SCSI_SENSE_BUFFERSIZE, sshdr); @@ -2016,7 +2021,7 @@ scsi_mode_select(struct scsi_device *sdev, int pf, int sp, int modepage, } ret = scsi_execute_req(sdev, cmd, DMA_TO_DEVICE, real_buffer, len, - sshdr, timeout, retries); + sshdr, timeout, retries, NULL); kfree(real_buffer); return ret; } @@ -2081,7 +2086,7 @@ scsi_mode_sense(struct scsi_device *sdev, int dbd, int modepage, memset(buffer, 0, len); result = scsi_execute_req(sdev, cmd, DMA_FROM_DEVICE, buffer, len, - sshdr, timeout, retries); + sshdr, timeout, retries, NULL); /* This code looks awful: what it's doing is making sure an * ILLEGAL REQUEST sense return identifies the actual command @@ -2163,7 +2168,7 @@ scsi_test_unit_ready(struct scsi_device *sdev, int timeout, int retries, /* try to eat the UNIT_ATTENTION if there are enough retries */ do { result = scsi_execute_req(sdev, cmd, DMA_NONE, NULL, 0, sshdr, - timeout, retries); + timeout, retries, NULL); if (sdev->removable && scsi_sense_valid(sshdr) && sshdr->sense_key == UNIT_ATTENTION) sdev->changed = 1; |