linux-kernel - mmc/card/block.c : mmc_blk

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Date:	Thu, 4 Sep 2008 17:17:15 +0800
From:	<sasin@...omon-systech.com>
To:	<linux-kernel@...r.kernel.org>
Subject: mmc/card/block.c : mmc_blk_open readonly mount bug?

mmc_block_open increments md->usage although it returns with -EROFS when
default mounting a MMC/SD card with write protect switch on.  This
reference counting bug prevents /dev/mmcblkX from being released on card
removal, and situation worsen with reinsertion until the minor number
range runs out.

"return -EROFS;"

should be replaced by

"
{
ret = -EROFS;
mmc_blk_put(md);
}
"

Best regards,
Sasi
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