Requesting to many bvecs upsets bio_alloc_bioset, so limit the number we ask
for to the amount it can handle.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Index: lio-core/drivers/target/target_core_iblock.c
===================================================================
--- lio-core.orig/drivers/target/target_core_iblock.c 2012-01-25 19:04:21.155981320 +0100
+++ lio-core/drivers/target/target_core_iblock.c 2012-02-02 18:40:15.524912699 +0100
@@ -463,6 +463,13 @@ iblock_get_bio(struct se_task *task, sec
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)
+ 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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