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authorDavid Woodhouse <dwmw2@infradead.org>2007-11-21 18:45:12 +0100
committerPierre Ossman <drzeus@drzeus.cx>2007-11-21 18:45:38 +0100
commit1dff314451fa24d6b107aa05393d3169e56a7e0a (patch)
tree6aeca206d6b9ec3b8f3168351822183342e9604c /drivers
parentb37a05069b9ab9fb1e52393a3448d710c50c54d5 (diff)
mmc: Avoid re-using minor numbers before the original device is closed.
Move the code which marks the minor number as free to mmc_blk_put() so that it happens on the final close() (or removal), instead of doing it at removal even when the device is still logically open. Signed-off-by: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/mmc/card/block.c14
1 files changed, 6 insertions, 8 deletions
diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
index acaa05200ae7..aeb32a93f6a0 100644
--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -44,6 +44,9 @@
* max 8 partitions per card
*/
#define MMC_SHIFT 3
+#define MMC_NUM_MINORS (256 >> MMC_SHIFT)
+
+static unsigned long dev_use[MMC_NUM_MINORS/(8*sizeof(unsigned long))];
/*
* There is one mmc_blk_data per slot.
@@ -80,6 +83,9 @@ static void mmc_blk_put(struct mmc_blk_data *md)
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);
}
@@ -406,9 +412,6 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
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)
{
@@ -574,17 +577,12 @@ static void mmc_blk_remove(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);