Merge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6

[pandora-kernel.git] / drivers / scsi / sd.c

diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index cb85296..24eba31 100644 (file)
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -86,6 +86,19 @@ MODULE_ALIAS_SCSI_DEVICE(TYPE_DISK);
 MODULE_ALIAS_SCSI_DEVICE(TYPE_MOD);
 MODULE_ALIAS_SCSI_DEVICE(TYPE_RBC);
 
+static int  sd_revalidate_disk(struct gendisk *);
+static int  sd_probe(struct device *);
+static int  sd_remove(struct device *);
+static void sd_shutdown(struct device *);
+static int sd_suspend(struct device *, pm_message_t state);
+static int sd_resume(struct device *);
+static void sd_rescan(struct device *);
+static int sd_done(struct scsi_cmnd *);
+static void sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer);
+static void scsi_disk_release(struct class_device *cdev);
+static void sd_print_sense_hdr(struct scsi_disk *, struct scsi_sense_hdr *);
+static void sd_print_result(struct scsi_disk *, int);
+
 static DEFINE_IDR(sd_index_idr);
 static DEFINE_SPINLOCK(sd_index_lock);
 
@@ -240,6 +253,7 @@ static struct scsi_driver sd_template = {
                .shutdown       = sd_shutdown,
        },
        .rescan                 = sd_rescan,
+       .done                   = sd_done,
 };
 
 /*
@@ -381,6 +395,15 @@ static int sd_prep_fn(struct request_queue *q, struct request *rq)
                goto out;
        }
 
+       /*
+        * Some devices (some sdcards for one) don't like it if the
+        * last sector gets read in a larger then 1 sector read.
+        */
+       if (unlikely(sdp->last_sector_bug &&
+           rq->nr_sectors > sdp->sector_size / 512 &&
+           block + this_count == get_capacity(disk)))
+               this_count -= sdp->sector_size / 512;
+
        SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, "block=%llu\n",
                                        (unsigned long long)block));
 
@@ -508,12 +531,6 @@ static int sd_prep_fn(struct request_queue *q, struct request *rq)
        SCpnt->allowed = SD_MAX_RETRIES;
        SCpnt->timeout_per_command = timeout;
 
-       /*
-        * This is the completion routine we use.  This is matched in terms
-        * of capability to this function.
-        */
-       SCpnt->done = sd_rw_intr;
-
        /*
         * This indicates that the command is ready from our end to be
         * queued.
@@ -728,6 +745,7 @@ static int sd_media_changed(struct gendisk *disk)
 {
        struct scsi_disk *sdkp = scsi_disk(disk);
        struct scsi_device *sdp = sdkp->device;
+       struct scsi_sense_hdr *sshdr = NULL;
        int retval;
 
        SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_media_changed\n"));
@@ -741,8 +759,11 @@ static int sd_media_changed(struct gendisk *disk)
         * can deal with it then.  It is only because of unrecoverable errors
         * that we would ever take a device offline in the first place.
         */
-       if (!scsi_device_online(sdp))
-               goto not_present;
+       if (!scsi_device_online(sdp)) {
+               set_media_not_present(sdkp);
+               retval = 1;
+               goto out;
+       }
 
        /*
         * Using TEST_UNIT_READY enables differentiation between drive with
@@ -754,8 +775,12 @@ static int sd_media_changed(struct gendisk *disk)
         * sd_revalidate() is called.
         */
        retval = -ENODEV;
-       if (scsi_block_when_processing_errors(sdp))
-               retval = scsi_test_unit_ready(sdp, SD_TIMEOUT, SD_MAX_RETRIES);
+
+       if (scsi_block_when_processing_errors(sdp)) {
+               sshdr  = kzalloc(sizeof(*sshdr), GFP_KERNEL);
+               retval = scsi_test_unit_ready(sdp, SD_TIMEOUT, SD_MAX_RETRIES,
+                                             sshdr);
+       }
 
        /*
         * Unable to test, unit probably not ready.   This usually
@@ -763,8 +788,13 @@ static int sd_media_changed(struct gendisk *disk)
         * and we will figure it out later once the drive is
         * available again.
         */
-       if (retval)
-                goto not_present;
+       if (retval || (scsi_sense_valid(sshdr) &&
+                      /* 0x3a is medium not present */
+                      sshdr->asc == 0x3a)) {
+               set_media_not_present(sdkp);
+               retval = 1;
+               goto out;
+       }
 
        /*
         * For removable scsi disk we have to recognise the presence
@@ -775,12 +805,12 @@ static int sd_media_changed(struct gendisk *disk)
 
        retval = sdp->changed;
        sdp->changed = 0;
-
+out:
+       if (retval != sdkp->previous_state)
+               sdev_evt_send_simple(sdp, SDEV_EVT_MEDIA_CHANGE, GFP_KERNEL);
+       sdkp->previous_state = retval;
+       kfree(sshdr);
        return retval;
-
-not_present:
-       set_media_not_present(sdkp);
-       return 1;
 }
 
 static int sd_sync_cache(struct scsi_disk *sdkp)
@@ -887,13 +917,13 @@ static struct block_device_operations sd_fops = {
 };
 
 /**
- *     sd_rw_intr - bottom half handler: called when the lower level
+ *     sd_done - bottom half handler: called when the lower level
  *     driver has completed (successfully or otherwise) a scsi command.
  *     @SCpnt: mid-level's per command structure.
  *
  *     Note: potentially run from within an ISR. Must not block.
  **/
-static void sd_rw_intr(struct scsi_cmnd * SCpnt)
+static int sd_done(struct scsi_cmnd *SCpnt)
 {
        int result = SCpnt->result;
        unsigned int xfer_size = SCpnt->request_bufflen;
@@ -914,7 +944,7 @@ static void sd_rw_intr(struct scsi_cmnd * SCpnt)
        SCSI_LOG_HLCOMPLETE(1, scsi_print_result(SCpnt));
        if (sense_valid) {
                SCSI_LOG_HLCOMPLETE(1, scmd_printk(KERN_INFO, SCpnt,
-                                                  "sd_rw_intr: sb[respc,sk,asc,"
+                                                  "sd_done: sb[respc,sk,asc,"
                                                   "ascq]=%x,%x,%x,%x\n",
                                                   sshdr.response_code,
                                                   sshdr.sense_key, sshdr.asc,
@@ -986,7 +1016,7 @@ static void sd_rw_intr(struct scsi_cmnd * SCpnt)
                break;
        }
  out:
-       scsi_io_completion(SCpnt, good_bytes);
+       return good_bytes;
 }
 
 static int media_not_present(struct scsi_disk *sdkp,