tree a93c6f5a88bf9c7382ccc7a08424e58ed1fec2e3
parent 897f15fb587fd2772b9e7ff6ec0265057f3c3975
author Zach Brown <zach.brown@oracle.com> 1128106736 -0700
committer Linus Torvalds <torvalds@g5.osdl.org> 1128109277 -0700

[PATCH] aio: avoid extra aio_{read,write} call when ki_left == 0

Recently aio_p{read,write} changed to perform retries internally rather
than returning -EIOCBRETRY.  This inadvertantly resulted in always calling
aio_{read,write} with ki_left at 0 which would in turn immediately return
0.  Harmless, but we can avoid this call by checking in the caller.

Signed-off-by: Zach Brown <zach.brown@oracle.com>
Signed-off-by: Benjamin LaHaise <bcrl@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>