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Subject[PATCH] ext3: small fix for previous retries patch in ext3_prepare_write()
Patch from Dmitry Monakhov:
Previous fix for retries in ext3_prepare_write() violation
was a bit errorneuos:
- it missed return of error code from ext3_journal_stop()
- it missed do_journal_get_write_access() before commit_write

a few comments added also.

Signed-Off-By: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-Off-By: Kirill Korotaev <dev@openvz.org>


diff --git a/fs/ext3/inode.c b/fs/ext3/inode.c
index a48ada9..1acb528 100644
--- a/fs/ext3/inode.c
+++ b/fs/ext3/inode.c
@@ -1162,13 +1162,14 @@ static int ext3_prepare_failure(struct f
struct buffer_head *bh, *head, *next;
unsigned block_start, block_end;
unsigned blocksize;
+ int ret;
+ handle_t *handle = ext3_journal_current_handle();

mapping = page->mapping;
if (ext3_should_writeback_data(mapping->host)) {
/* optimization: no constraints about data */
skip:
- ext3_journal_stop(ext3_journal_current_handle());
- return 0;
+ return ext3_journal_stop(handle);
}

head = page_buffers(page);
@@ -1186,7 +1187,19 @@ skip:
break;
}
if (!buffer_mapped(bh))
+ /* prepare_write failed on this bh */
break;
+ if (ext3_should_journal_data(mapping->host)) {
+ ret = do_journal_get_write_access(handle, bh);
+ if (ret) {
+ ext3_journal_stop(handle);
+ return ret;
+ }
+ }
+ /*
+ * block_start here becomes the first block where the current iteration
+ * of prepare_write failed.
+ */
}
if (block_start <= from)
goto skip;
-
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