* Block driver for media (i.e., flash cards)
*
* Copyright 2002 Hewlett-Packard Company
- * Copyright 2005-2007 Pierre Ossman
+ * Copyright 2005-2008 Pierre Ossman
*
* Use consistent with the GNU GPL is permitted,
* provided that this copyright notice is
* max 8 partitions per card
*/
#define MMC_SHIFT 3
+#define MMC_NUM_MINORS (256 >> MMC_SHIFT)
+
+static DECLARE_BITMAP(dev_use, MMC_NUM_MINORS);
/*
* There is one mmc_blk_data per slot.
mutex_lock(&open_lock);
md->usage--;
if (md->usage == 0) {
+ int devidx = md->disk->first_minor >> MMC_SHIFT;
+ __clear_bit(devidx, dev_use);
+
put_disk(md->disk);
kfree(md);
}
if (brq.data.blocks > card->host->max_blk_count)
brq.data.blocks = card->host->max_blk_count;
- /*
- * If the host doesn't support multiple block writes, force
- * block writes to single block. SD cards are excepted from
- * this rule as they support querying the number of
- * successfully written sectors.
- */
- if (rq_data_dir(req) != READ &&
- !(card->host->caps & MMC_CAP_MULTIWRITE) &&
- !mmc_card_sd(card))
- brq.data.blocks = 1;
-
if (brq.data.blocks > 1) {
/* SPI multiblock writes terminate using a special
* token, not a STOP_TRANSMISSION request.
mmc_queue_bounce_post(mq);
+ /*
+ * Check for errors here, but don't jump to cmd_err
+ * until later as we need to wait for the card to leave
+ * programming mode even when things go wrong.
+ */
if (brq.cmd.error) {
printk(KERN_ERR "%s: error %d sending read/write command\n",
req->rq_disk->disk_name, brq.cmd.error);
- goto cmd_err;
}
if (brq.data.error) {
printk(KERN_ERR "%s: error %d transferring data\n",
req->rq_disk->disk_name, brq.data.error);
- goto cmd_err;
}
if (brq.stop.error) {
printk(KERN_ERR "%s: error %d sending stop command\n",
req->rq_disk->disk_name, brq.stop.error);
- goto cmd_err;
}
if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ) {
req->rq_disk->disk_name, err);
goto cmd_err;
}
- } while (!(cmd.resp[0] & R1_READY_FOR_DATA));
+ /*
+ * Some cards mishandle the status bits,
+ * so make sure to check both the busy
+ * indication and the card state.
+ */
+ } while (!(cmd.resp[0] & R1_READY_FOR_DATA) ||
+ (R1_CURRENT_STATE(cmd.resp[0]) == 7));
#if 0
if (cmd.resp[0] & ~0x00000900)
#endif
}
+ if (brq.cmd.error || brq.data.error || brq.stop.error)
+ goto cmd_err;
+
/*
* A block was successfully transferred.
*/
spin_lock_irq(&md->lock);
- ret = end_that_request_chunk(req, 1, brq.data.bytes_xfered);
- if (!ret) {
- /*
- * The whole request completed successfully.
- */
- add_disk_randomness(req->rq_disk);
- blkdev_dequeue_request(req);
- end_that_request_last(req, 1);
- }
+ ret = __blk_end_request(req, 0, brq.data.bytes_xfered);
spin_unlock_irq(&md->lock);
} while (ret);
* mark the known good sectors as ok.
*
* If the card is not SD, we can still ok written sectors
- * if the controller can do proper error reporting.
+ * as reported by the controller (which might be less than
+ * the real number of written sectors, but never more).
*
* For reads we just fail the entire chunk as that should
* be safe in all cases.
*/
- if (rq_data_dir(req) != READ && mmc_card_sd(card)) {
- u32 blocks;
- unsigned int bytes;
-
- blocks = mmc_sd_num_wr_blocks(card);
- if (blocks != (u32)-1) {
- if (card->csd.write_partial)
- bytes = blocks << md->block_bits;
- else
- bytes = blocks << 9;
+ if (rq_data_dir(req) != READ) {
+ if (mmc_card_sd(card)) {
+ u32 blocks;
+ unsigned int bytes;
+
+ blocks = mmc_sd_num_wr_blocks(card);
+ if (blocks != (u32)-1) {
+ if (card->csd.write_partial)
+ bytes = blocks << md->block_bits;
+ else
+ bytes = blocks << 9;
+ spin_lock_irq(&md->lock);
+ ret = __blk_end_request(req, 0, bytes);
+ spin_unlock_irq(&md->lock);
+ }
+ } else {
spin_lock_irq(&md->lock);
- ret = end_that_request_chunk(req, 1, bytes);
+ ret = __blk_end_request(req, 0, brq.data.bytes_xfered);
spin_unlock_irq(&md->lock);
}
- } else if (rq_data_dir(req) != READ &&
- (card->host->caps & MMC_CAP_MULTIWRITE)) {
- spin_lock_irq(&md->lock);
- ret = end_that_request_chunk(req, 1, brq.data.bytes_xfered);
- spin_unlock_irq(&md->lock);
}
mmc_release_host(card->host);
spin_lock_irq(&md->lock);
- while (ret) {
- ret = end_that_request_chunk(req, 0,
- req->current_nr_sectors << 9);
- }
-
- add_disk_randomness(req->rq_disk);
- blkdev_dequeue_request(req);
- end_that_request_last(req, 0);
+ while (ret)
+ ret = __blk_end_request(req, -EIO, blk_rq_cur_bytes(req));
spin_unlock_irq(&md->lock);
return 0;
}
-#define MMC_NUM_MINORS (256 >> MMC_SHIFT)
-
-static unsigned long dev_use[MMC_NUM_MINORS/(8*sizeof(unsigned long))];
static inline int mmc_blk_readonly(struct mmc_card *card)
{
struct mmc_blk_data *md = mmc_get_drvdata(card);
if (md) {
- int devidx;
-
/* Stop new requests from getting into the queue */
del_gendisk(md->disk);
/* Then flush out any already in there */
mmc_cleanup_queue(&md->queue);
- devidx = md->disk->first_minor >> MMC_SHIFT;
- __clear_bit(devidx, dev_use);
-
mmc_blk_put(md);
}
mmc_set_drvdata(card, NULL);
projects / linux-2.6 / blobdiff