From 59fe27c0a8173a74b105debc803b97582028c90b Mon Sep 17 00:00:00 2001 From: Joern Engel Date: Wed, 17 Mar 2010 13:47:45 +0100 Subject: [PATCH] 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: Joern Engel --- fs/logfs/dev_bdev.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/fs/logfs/dev_bdev.c b/fs/logfs/dev_bdev.c index 9718c22f186d..f99f5dcce546 100644 --- a/fs/logfs/dev_bdev.c +++ b/fs/logfs/dev_bdev.c @@ -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) { -- 2.20.1