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[PATCH] sd: read-only switch

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Support for the read-only switch on SD cards which must be enforced by the
host.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Pierre Ossman
2005-09-06 15:18:52 -07:00
committed by Linus Torvalds
parent 335eadf2ef
commit a00fc09029
4 changed files with 34 additions and 18 deletions
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9
drivers/mmc/mmc_block.c
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@@ -95,6 +95,10 @@ static int mmc_blk_open(struct inode *inode, struct file *filp)
if (md->usage == 2)
check_disk_change(inode->i_bdev);
ret = 0;
if ((filp->f_mode & FMODE_WRITE) &&
mmc_card_readonly(md->queue.card))
ret = -EROFS;
}
return ret;
@@ -403,9 +407,10 @@ static int mmc_blk_probe(struct mmc_card *card)
if (err)
goto out;
printk(KERN_INFO "%s: %s %s %dKiB\n",
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);
(card->csd.capacity << card->csd.read_blkbits) / 1024,
mmc_card_readonly(card)?"(ro)":"");
mmc_set_drvdata(card, md);
add_disk(md->disk);