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Commit 5c55125f authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Nicholas Bellinger
Browse files

iblock: fix handling of large requests 



Requesting to many bvecs upsets bio_alloc_bioset, so limit the number we ask
for to the amount it can handle.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarNicholas Bellinger <nab@linux-iscsi.org>
parent 3011684c

drivers/target/target_core_iblock.c

+7 −0
Original line number Diff line number Diff line
@@ -488,6 +488,13 @@ iblock_get_bio(struct se_task *task, sector_t lba, u32 sg_num) 
	struct iblock_req *ib_req = IBLOCK_REQ(task);

	struct bio *bio;



	/*

	 * Only allocate as many vector entries as the bio code allows us to,

	 * we'll loop later on until we have handled the whole request.

	 */

	if (sg_num > BIO_MAX_PAGES)

		sg_num = BIO_MAX_PAGES;



	bio = bio_alloc_bioset(GFP_NOIO, sg_num, ib_dev->ibd_bio_set);

	if (!bio) {

		pr_err("Unable to allocate memory for bio\n");