-
-/**
- * scsi_mode_select - issue a mode select
- * @sdev: SCSI device to be queried
- * @pf: Page format bit (1 == standard, 0 == vendor specific)
- * @sp: Save page bit (0 == don't save, 1 == save)
- * @modepage: mode page being requested
- * @buffer: request buffer (may not be smaller than eight bytes)
- * @len: length of request buffer.
- * @timeout: command timeout
- * @retries: number of retries before failing
- * @data: returns a structure abstracting the mode header data
- * @sense: place to put sense data (or NULL if no sense to be collected).
- * must be SCSI_SENSE_BUFFERSIZE big.
- *
- * Returns zero if successful; negative error number or scsi
- * status on error
- *
- */
-int
-scsi_mode_select(struct scsi_device *sdev, int pf, int sp, int modepage,
- unsigned char *buffer, int len, int timeout, int retries,
- struct scsi_mode_data *data, struct scsi_sense_hdr *sshdr)
-{
- unsigned char cmd[10];
- unsigned char *real_buffer;
- int ret;
-
- memset(cmd, 0, sizeof(cmd));
- cmd[1] = (pf ? 0x10 : 0) | (sp ? 0x01 : 0);
-
- if (sdev->use_10_for_ms) {
- if (len > 65535)
- return -EINVAL;
- real_buffer = kmalloc(8 + len, GFP_KERNEL);
- if (!real_buffer)
- return -ENOMEM;
- memcpy(real_buffer + 8, buffer, len);
- len += 8;
- real_buffer[0] = 0;
- real_buffer[1] = 0;
- real_buffer[2] = data->medium_type;
- real_buffer[3] = data->device_specific;
- real_buffer[4] = data->longlba ? 0x01 : 0;
- real_buffer[5] = 0;
- real_buffer[6] = data->block_descriptor_length >> 8;
- real_buffer[7] = data->block_descriptor_length;
-
- cmd[0] = MODE_SELECT_10;
- cmd[7] = len >> 8;
- cmd[8] = len;
- } else {
- if (len > 255 || data->block_descriptor_length > 255 ||
- data->longlba)
- return -EINVAL;
-
- real_buffer = kmalloc(4 + len, GFP_KERNEL);
- if (!real_buffer)
- return -ENOMEM;
- memcpy(real_buffer + 4, buffer, len);
- len += 4;
- real_buffer[0] = 0;
- real_buffer[1] = data->medium_type;
- real_buffer[2] = data->device_specific;
- real_buffer[3] = data->block_descriptor_length;
-
-
- cmd[0] = MODE_SELECT;
- cmd[4] = len;
- }
-
- ret = scsi_execute_req(sdev, cmd, DMA_TO_DEVICE, real_buffer, len,
- sshdr, timeout, retries);
- kfree(real_buffer);
- return ret;
-}
-EXPORT_SYMBOL_GPL(scsi_mode_select);
-