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    Subject[PATCH] Support for read-only MMC cards
    If the card does not support the write commands then only allow
    read-only access.

    Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
    --- linux-2.6.11/drivers/mmc/mmc_block.c.orig 2005-06-04 21:44:20.000000000 +0200
    +++ linux-2.6.11/drivers/mmc/mmc_block.c 2005-06-04 21:48:46.000000000 +0200
    @@ -95,6 +95,10 @@ static int mmc_blk_open(struct inode *in
    if (md->usage == 2)
    check_disk_change(inode->i_bdev);
    ret = 0;
    +
    + if ((filp->f_mode & FMODE_WRITE) &&
    + !(md->queue.card->csd.cmdclass & CCC_BLOCK_WRITE))
    + ret = -EROFS;
    }

    return ret;
    @@ -403,9 +407,12 @@ static int mmc_blk_probe(struct mmc_card
    if (err)
    goto out;

    - printk(KERN_INFO "%s: %s %s %dKiB\n",
    + printk(KERN_INFO "%s: %s %s %dKiB",
    md->disk->disk_name, mmc_card_id(card), mmc_card_name(card),
    (card->csd.capacity << card->csd.read_blkbits) / 1024);
    + if (!(card->csd.cmdclass & CCC_BLOCK_WRITE))
    + printk(" (ro)");
    + printk("\n");

    mmc_set_drvdata(card, md);
    add_disk(md->disk);
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      Last update: 2005-06-04 22:02    [W:0.030 / U:0.096 seconds]
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