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 <>
Signed-off-by: default avatarNicholas Bellinger <>
parent 3011684c
......@@ -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");
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