Merge branch 'postmerge' into for-linus

[karo-tx-linux.git] / drivers / scsi / sd.c

diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 7992635d405fbe91cd1029e8cce15af7e60becc0..c1c555242d0d715d46c051955deacea4a819d634 100644 (file)
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -142,6 +142,7 @@ sd_store_cache_type(struct device *dev, struct device_attribute *attr,
        char *buffer_data;
        struct scsi_mode_data data;
        struct scsi_sense_hdr sshdr;
+       const char *temp = "temporary ";
        int len;
 
        if (sdp->type != TYPE_DISK)
@@ -150,6 +151,13 @@ sd_store_cache_type(struct device *dev, struct device_attribute *attr,
                 * it's not worth the risk */
                return -EINVAL;
 
+       if (strncmp(buf, temp, sizeof(temp) - 1) == 0) {
+               buf += sizeof(temp) - 1;
+               sdkp->cache_override = 1;
+       } else {
+               sdkp->cache_override = 0;
+       }
+
        for (i = 0; i < ARRAY_SIZE(sd_cache_types); i++) {
                len = strlen(sd_cache_types[i]);
                if (strncmp(sd_cache_types[i], buf, len) == 0 &&
@@ -162,6 +170,13 @@ sd_store_cache_type(struct device *dev, struct device_attribute *attr,
                return -EINVAL;
        rcd = ct & 0x01 ? 1 : 0;
        wce = ct & 0x02 ? 1 : 0;
+
+       if (sdkp->cache_override) {
+               sdkp->WCE = wce;
+               sdkp->RCD = rcd;
+               return count;
+       }
+
        if (scsi_mode_sense(sdp, 0x08, 8, buffer, sizeof(buffer), SD_TIMEOUT,
                            SD_MAX_RETRIES, &data, NULL))
                return -EINVAL;
@@ -1121,10 +1136,6 @@ static int sd_open(struct block_device *bdev, fmode_t mode)
 
        sdev = sdkp->device;
 
-       retval = scsi_autopm_get_device(sdev);
-       if (retval)
-               goto error_autopm;
-
        /*
         * If the device is in error recovery, wait until it is done.
         * If the device is offline, then disallow any access to it.
@@ -1169,8 +1180,6 @@ static int sd_open(struct block_device *bdev, fmode_t mode)
        return 0;
 
 error_out:
-       scsi_autopm_put_device(sdev);
-error_autopm:
        scsi_disk_put(sdkp);
        return retval;  
 }
@@ -1188,7 +1197,7 @@ error_autopm:
  *
  *     Locking: called with bdev->bd_mutex held.
  **/
-static int sd_release(struct gendisk *disk, fmode_t mode)
+static void sd_release(struct gendisk *disk, fmode_t mode)
 {
        struct scsi_disk *sdkp = scsi_disk(disk);
        struct scsi_device *sdev = sdkp->device;
@@ -1205,9 +1214,7 @@ static int sd_release(struct gendisk *disk, fmode_t mode)
         * XXX is followed by a "rmmod sd_mod"?
         */
 
-       scsi_autopm_put_device(sdev);
        scsi_disk_put(sdkp);
-       return 0;
 }
 
 static int sd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
@@ -1367,14 +1374,9 @@ static unsigned int sd_check_events(struct gendisk *disk, unsigned int clearing)
        retval = -ENODEV;
 
        if (scsi_block_when_processing_errors(sdp)) {
-               retval = scsi_autopm_get_device(sdp);
-               if (retval)
-                       goto out;
-
                sshdr  = kzalloc(sizeof(*sshdr), GFP_KERNEL);
                retval = scsi_test_unit_ready(sdp, SD_TIMEOUT, SD_MAX_RETRIES,
                                              sshdr);
-               scsi_autopm_put_device(sdp);
        }
 
        /* failed to execute TUR, assume media not present */
@@ -1424,8 +1426,9 @@ static int sd_sync_cache(struct scsi_disk *sdkp)
                 * Leave the rest of the command zero to indicate
                 * flush everything.
                 */
-               res = scsi_execute_req(sdp, cmd, DMA_NONE, NULL, 0, &sshdr,
-                                      SD_FLUSH_TIMEOUT, SD_MAX_RETRIES, NULL);
+               res = scsi_execute_req_flags(sdp, cmd, DMA_NONE, NULL, 0,
+                                            &sshdr, SD_FLUSH_TIMEOUT,
+                                            SD_MAX_RETRIES, NULL, REQ_PM);
                if (res == 0)
                        break;
        }
@@ -2319,6 +2322,10 @@ sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer)
        int old_rcd = sdkp->RCD;
        int old_dpofua = sdkp->DPOFUA;
 
+
+       if (sdkp->cache_override)
+               return;
+
        first_len = 4;
        if (sdp->skip_ms_page_8) {
                if (sdp->type == TYPE_RBC)
@@ -2812,6 +2819,7 @@ static void sd_probe_async(void *data, async_cookie_t cookie)
        sdkp->capacity = 0;
        sdkp->media_present = 1;
        sdkp->write_prot = 0;
+       sdkp->cache_override = 0;
        sdkp->WCE = 0;
        sdkp->RCD = 0;
        sdkp->ATO = 0;
@@ -2838,6 +2846,7 @@ static void sd_probe_async(void *data, async_cookie_t cookie)
 
        sd_printk(KERN_NOTICE, sdkp, "Attached SCSI %sdisk\n",
                  sdp->removable ? "removable " : "");
+       blk_pm_runtime_init(sdp->request_queue, dev);
        scsi_autopm_put_device(sdp);
        put_device(&sdkp->dev);
 }
@@ -3021,8 +3030,8 @@ static int sd_start_stop_device(struct scsi_disk *sdkp, int start)
        if (!scsi_device_online(sdp))
                return -ENODEV;
 
-       res = scsi_execute_req(sdp, cmd, DMA_NONE, NULL, 0, &sshdr,
-                              SD_TIMEOUT, SD_MAX_RETRIES, NULL);
+       res = scsi_execute_req_flags(sdp, cmd, DMA_NONE, NULL, 0, &sshdr,
+                              SD_TIMEOUT, SD_MAX_RETRIES, NULL, REQ_PM);
        if (res) {
                sd_printk(KERN_WARNING, sdkp, "START_STOP FAILED\n");
                sd_print_result(sdkp, res);