diff options
| author | Pierre Ossman <drzeus@drzeus.cx> | 2005-10-30 10:15:58 +0000 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2005-10-30 10:15:58 +0000 |
| commit | 936d8592654bb97d5706a73c0e2a6339b090f7fb (patch) | |
| tree | 78282b935a267627ef7b259853aced6abb9fc566 /drivers/mmc | |
| parent | 9e1d98c5d8613d917004a193d4f989a3544d8fef (diff) | |
| download | linux-936d8592654bb97d5706a73c0e2a6339b090f7fb.tar.gz linux-936d8592654bb97d5706a73c0e2a6339b090f7fb.tar.bz2 linux-936d8592654bb97d5706a73c0e2a6339b090f7fb.zip | |
[MMC] Use command class to determine read-only status
If a card doesn't support the "write block" command class then
any attempts to open the device should reflect this by denying
write access.
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/mmc_block.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/mmc/mmc_block.c b/drivers/mmc/mmc_block.c index fa83f15fdf16..9b629856c735 100644 --- a/drivers/mmc/mmc_block.c +++ b/drivers/mmc/mmc_block.c @@ -85,6 +85,12 @@ static void mmc_blk_put(struct mmc_blk_data *md) up(&open_lock); } +static inline int mmc_blk_readonly(struct mmc_card *card) +{ + return mmc_card_readonly(card) || + !(card->csd.cmdclass & CCC_BLOCK_WRITE); +} + static int mmc_blk_open(struct inode *inode, struct file *filp) { struct mmc_blk_data *md; @@ -97,7 +103,7 @@ static int mmc_blk_open(struct inode *inode, struct file *filp) ret = 0; if ((filp->f_mode & FMODE_WRITE) && - mmc_card_readonly(md->queue.card)) + mmc_blk_readonly(md->queue.card)) ret = -EROFS; } @@ -410,7 +416,7 @@ static int mmc_blk_probe(struct mmc_card *card) printk(KERN_INFO "%s: %s %s %dKiB %s\n", md->disk->disk_name, mmc_card_id(card), mmc_card_name(card), (card->csd.capacity << card->csd.read_blkbits) / 1024, - mmc_card_readonly(card)?"(ro)":""); + mmc_blk_readonly(card)?"(ro)":""); mmc_set_drvdata(card, md); add_disk(md->disk); |