diff options
author | Tony Lindgren <tony@atomide.com> | 2011-02-25 12:27:14 -0800 |
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committer | Tony Lindgren <tony@atomide.com> | 2011-02-25 12:27:14 -0800 |
commit | 02fa9f0451ac639a687bfc145eefe58703ff220e (patch) | |
tree | fe984acc78f22f6eb8fb98efaba8b1ac2f3ad8d9 /fs/btrfs/file.c | |
parent | cbc9438075ca9dee3f39a2e7310f81c304b40359 (diff) | |
parent | 51c404b2c514930e98e81e0b9294f19892a4f871 (diff) |
Merge branch 'patches_for_2.6.38rc' of git://git.pwsan.com/linux-2.6 into devel-fixes
Diffstat (limited to 'fs/btrfs/file.c')
-rw-r--r-- | fs/btrfs/file.c | 21 |
1 files changed, 15 insertions, 6 deletions
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c index c800d58f301..7084140d594 100644 --- a/fs/btrfs/file.c +++ b/fs/btrfs/file.c @@ -186,6 +186,7 @@ int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end, split = alloc_extent_map(GFP_NOFS); if (!split2) split2 = alloc_extent_map(GFP_NOFS); + BUG_ON(!split || !split2); write_lock(&em_tree->lock); em = lookup_extent_mapping(em_tree, start, len); @@ -793,8 +794,12 @@ again: for (i = 0; i < num_pages; i++) { pages[i] = grab_cache_page(inode->i_mapping, index + i); if (!pages[i]) { - err = -ENOMEM; - BUG_ON(1); + int c; + for (c = i - 1; c >= 0; c--) { + unlock_page(pages[c]); + page_cache_release(pages[c]); + } + return -ENOMEM; } wait_on_page_writeback(pages[i]); } @@ -946,6 +951,10 @@ static ssize_t btrfs_file_aio_write(struct kiocb *iocb, PAGE_CACHE_SIZE, PAGE_CACHE_SIZE / (sizeof(struct page *))); pages = kmalloc(nrptrs * sizeof(struct page *), GFP_KERNEL); + if (!pages) { + ret = -ENOMEM; + goto out; + } /* generic_write_checks can change our pos */ start_pos = pos; @@ -984,8 +993,8 @@ static ssize_t btrfs_file_aio_write(struct kiocb *iocb, size_t write_bytes = min(iov_iter_count(&i), nrptrs * (size_t)PAGE_CACHE_SIZE - offset); - size_t num_pages = (write_bytes + PAGE_CACHE_SIZE - 1) >> - PAGE_CACHE_SHIFT; + size_t num_pages = (write_bytes + offset + + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; WARN_ON(num_pages > nrptrs); memset(pages, 0, sizeof(struct page *) * nrptrs); @@ -1015,8 +1024,8 @@ static ssize_t btrfs_file_aio_write(struct kiocb *iocb, copied = btrfs_copy_from_user(pos, num_pages, write_bytes, pages, &i); - dirty_pages = (copied + PAGE_CACHE_SIZE - 1) >> - PAGE_CACHE_SHIFT; + dirty_pages = (copied + offset + PAGE_CACHE_SIZE - 1) >> + PAGE_CACHE_SHIFT; if (num_pages > dirty_pages) { if (copied > 0) |