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authorJoern Engel <joern@logfs.org>2010-03-17 08:47:45 -0400
committerJoern Engel <joern@logfs.org>2010-03-27 06:19:14 -0400
commit59fe27c0a8173a74b105debc803b97582028c90b (patch)
tree6011317b8da26f879989a4b654aedf6549181968 /fs/logfs
parent49137f2efb5cf68724bccaba531ab3d59acd71f9 (diff)
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 <joern@logfs.org>
Diffstat (limited to 'fs/logfs')
-rw-r--r--fs/logfs/dev_bdev.c8
1 files 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,
97 unsigned int max_pages = queue_max_hw_sectors(q) >> (PAGE_SHIFT - 9); 97 unsigned int max_pages = queue_max_hw_sectors(q) >> (PAGE_SHIFT - 9);
98 int i; 98 int i;
99 99
100 if (max_pages > BIO_MAX_PAGES)
101 max_pages = BIO_MAX_PAGES;
100 bio = bio_alloc(GFP_NOFS, max_pages); 102 bio = bio_alloc(GFP_NOFS, max_pages);
101 BUG_ON(!bio); /* FIXME: handle this */ 103 BUG_ON(!bio);
102 104
103 for (i = 0; i < nr_pages; i++) { 105 for (i = 0; i < nr_pages; i++) {
104 if (i >= max_pages) { 106 if (i >= max_pages) {
@@ -191,8 +193,10 @@ static int do_erase(struct super_block *sb, u64 ofs, pgoff_t index,
191 unsigned int max_pages = queue_max_hw_sectors(q) >> (PAGE_SHIFT - 9); 193 unsigned int max_pages = queue_max_hw_sectors(q) >> (PAGE_SHIFT - 9);
192 int i; 194 int i;
193 195
196 if (max_pages > BIO_MAX_PAGES)
197 max_pages = BIO_MAX_PAGES;
194 bio = bio_alloc(GFP_NOFS, max_pages); 198 bio = bio_alloc(GFP_NOFS, max_pages);
195 BUG_ON(!bio); /* FIXME: handle this */ 199 BUG_ON(!bio);
196 200
197 for (i = 0; i < nr_pages; i++) { 201 for (i = 0; i < nr_pages; i++) {
198 if (i >= max_pages) { 202 if (i >= max_pages) {