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[PATCH] change io_cancel return code for no cancel case

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Note that other than few exceptions, most of the current filesystem and/or
drivers do not have aio cancel specifically defined (kiob->ki_cancel field
is mostly NULL).  However, sys_io_cancel system call universally sets
return code to -EAGAIN.  This gives applications a wrong impression that
this call is implemented but just never works.  We have customer inquires
about this issue.

Changed by Benjamin LaHaise to EINVAL instead of ENOSYS

Signed-off-by: S. Wendy Cheng <wcheng@redhat.com>
Acked-by: Benjamin LaHaise <bcrl@kvack.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Wendy Cheng 2005-09-09 13:02:08 -07:00 committed by Linus Torvalds
parent 6f519165a9
commit 8f58202bf6
1 changed files with 1 additions and 1 deletions
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2
fs/aio.c
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@ -1673,7 +1673,7 @@ asmlinkage long sys_io_cancel(aio_context_t ctx_id, struct iocb __user *iocb,
ret = -EFAULT;
}
} else
printk(KERN_DEBUG "iocb has no cancel operation\n");
ret = -EINVAL;
put_ioctx(ctx);