Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=8268f5a7415d914fc855a86aa2284ac819dc6b2e
Commit: 8268f5a7415d914fc855a86aa2284ac819dc6b2e
Parent: afddba49d18f346e5cc2938b6ed7c512db18ca68
Author: Dmitry Monakhov <[EMAIL PROTECTED]>
AuthorDate: Tue Oct 16 01:25:02 2007 -0700
Committer: Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Tue Oct 16 09:42:55 2007 -0700
deny partial write for loop dev fd
Partial write can be easily supported by LO_CRYPT_NONE mode, but it is not
easy in LO_CRYPT_CRYPTOAPI case, because of its block nature. I don't know
who still used cryptoapi, but theoretically it is possible. So let's leave
things as they are. Loop device doesn't support partial write before
Nick's "write_begin/write_end" patch set, and let's it behave the same way
after.
Signed-off-by: Dmitriy Monakhov <[EMAIL PROTECTED]>
Cc: Nick Piggin <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
drivers/block/loop.c | 4 +---
1 files changed, 1 insertions(+), 3 deletions(-)
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index a5f993a..e5a0515 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -245,10 +245,8 @@ static int do_lo_send_aops(struct loop_device *lo, struct
bio_vec *bvec,
ret = pagecache_write_end(file, mapping, pos, size, copied,
page, fsdata);
- if (ret < 0)
+ if (ret < 0 || ret != copied)
goto fail;
- if (ret < copied)
- copied = ret;
if (unlikely(transfer_result))
goto fail;
-
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