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authorPierre Ossman <drzeus-list@drzeus.cx>2005-09-06 15:18:52 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2005-09-07 16:57:50 -0700
commita00fc09029f02ca833cf90e5d5625f08c4ac4f51 (patch)
tree02774c6f35623a27fbefbe1fe7f26f4a0f5fdd32 /drivers/mmc/mmc_block.c
parent335eadf2ef6a1122a720aea98e758e5d431da87d (diff)
downloadop-kernel-dev-a00fc09029f02ca833cf90e5d5625f08c4ac4f51.zip
op-kernel-dev-a00fc09029f02ca833cf90e5d5625f08c4ac4f51.tar.gz
[PATCH] sd: read-only switch
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>
Diffstat (limited to 'drivers/mmc/mmc_block.c')
-rw-r--r--drivers/mmc/mmc_block.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/mmc/mmc_block.c b/drivers/mmc/mmc_block.c
index d4eee99..fa83f15 100644
--- a/drivers/mmc/mmc_block.c
+++ b/drivers/mmc/mmc_block.c
@@ -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);
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