Commit 59fe27c0 authored by Joern Engel's avatar Joern Engel
Browse files

Limit max_pages for insane devices 



Intel SSDs have a limit of 0xffff as queue_max_hw_sectors(q).  Such a
limit may make sense from a hardware pov, but it causes bio_alloc() to
return NULL.

Signed-off-by: default avatarJoern Engel <joern@logfs.org>
parent 49137f2e

fs/logfs/dev_bdev.c

+6 −2
Original line number Diff line number Diff line
@@ -97,8 +97,10 @@ static int __bdev_writeseg(struct super_block *sb, u64 ofs, pgoff_t index, 
	unsigned int max_pages = queue_max_hw_sectors(q) >> (PAGE_SHIFT - 9);

	int i;



	if (max_pages > BIO_MAX_PAGES)

		max_pages = BIO_MAX_PAGES;

	bio = bio_alloc(GFP_NOFS, max_pages);

	BUG_ON(!bio); /* FIXME: handle this */

	BUG_ON(!bio);



	for (i = 0; i < nr_pages; i++) {

		if (i >= max_pages) {
@@ -191,8 +193,10 @@ static int do_erase(struct super_block *sb, u64 ofs, pgoff_t index, 
	unsigned int max_pages = queue_max_hw_sectors(q) >> (PAGE_SHIFT - 9);

	int i;



	if (max_pages > BIO_MAX_PAGES)

		max_pages = BIO_MAX_PAGES;

	bio = bio_alloc(GFP_NOFS, max_pages);

	BUG_ON(!bio); /* FIXME: handle this */

	BUG_ON(!bio);



	for (i = 0; i < nr_pages; i++) {

		if (i >= max_pages) {