From: Namjae Jeon <namjae.jeon@xxxxxxxxxxx> It is better to use blk_queue_max_discard_sectors helper function to set max_discard_sectors as it checks max_discard_sectors upper limit UINT_MAX >> 9 similar issue was reported for mmc in below link https://lkml.org/lkml/2013/4/1/292 If multiple discard requests get merged, merged discard request's size exceeds 4GB, there is possibility that merged discard request's __data_len field may overflow. This patch fixes this issue. Signed-off-by: Namjae Jeon <namjae.jeon@xxxxxxxxxxx> Signed-off-by: Vivek Trivedi <t.vivek@xxxxxxxxxxx> --- drivers/mtd/mtd_blkdevs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/mtd/mtd_blkdevs.c b/drivers/mtd/mtd_blkdevs.c index 5ad39bb..cf35f99 100644 --- a/drivers/mtd/mtd_blkdevs.c +++ b/drivers/mtd/mtd_blkdevs.c @@ -417,7 +417,7 @@ int add_mtd_blktrans_dev(struct mtd_blktrans_dev *new) if (tr->discard) { queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, new->rq); - new->rq->limits.max_discard_sectors = UINT_MAX; + blk_queue_max_discard_sectors(new->rq, UINT_MAX >> 9); } gd->queue = new->rq; -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
