The patch titled mmc_block: add dev_t initialization check has been added to the -mm tree. Its filename is mmc_block-add-dev_t-initialization-check.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/SubmitChecklist when testing your code *** See http://userweb.kernel.org/~akpm/stuff/added-to-mm.txt to find out what to do about this The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/ ------------------------------------------------------ Subject: mmc_block: add dev_t initialization check From: Anna Lemehova <EXT-Anna.Lemehova@xxxxxxxxx> When a card is removed before mmc_blk_probe() has called add_disk(), then the minor field is uninitialized and has value 0. This caused mmc_blk_put() to always release devidx 0 even if 0 was still in use. Then the next mmc_blk_probe() used the first free idx of 0, which oopses in sysfs, since it is used by another card. Signed-off-by: Anna Lemehova <EXT-Anna.Lemehova@xxxxxxxxx> Signed-off-by: Adrian Hunter <adrian.hunter@xxxxxxxxx> Cc: <linux-mmc@xxxxxxxxxxxxxxx> Cc: <stable@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- drivers/mmc/card/block.c | 5 +++++ 1 file changed, 5 insertions(+) diff -puN drivers/mmc/card/block.c~mmc_block-add-dev_t-initialization-check drivers/mmc/card/block.c --- a/drivers/mmc/card/block.c~mmc_block-add-dev_t-initialization-check +++ a/drivers/mmc/card/block.c @@ -85,7 +85,12 @@ static void mmc_blk_put(struct mmc_blk_d mutex_lock(&open_lock); md->usage--; if (md->usage == 0) { + int devmaj = MAJOR(disk_devt(md->disk)); int devidx = MINOR(disk_devt(md->disk)) >> MMC_SHIFT; + + if (!devmaj) + devidx = md->disk->first_minor >> MMC_SHIFT; + __clear_bit(devidx, dev_use); put_disk(md->disk); _ Patches currently in -mm which might be from EXT-Anna.Lemehova@xxxxxxxxx are mmc_block-add-dev_t-initialization-check.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html