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| author | Kent Overstreet <koverstreet@google.com> | 2013-05-13 14:45:08 -0700 |
|---|---|---|
| committer | Benjamin LaHaise <bcrl@kvack.org> | 2013-07-30 11:53:11 -0400 |
| commit | bec68faaf3ba74ed0dcd5dc3a881b30aec542973 (patch) | |
| tree | fc8704d99fea0108346de7c1ca2500ac7199f1ae /drivers/usb/gadget | |
| parent | 723be6e39d14254bb5bb9f422b434566d359fa6e (diff) | |
| download | linux-bec68faaf3ba74ed0dcd5dc3a881b30aec542973.tar.gz linux-bec68faaf3ba74ed0dcd5dc3a881b30aec542973.tar.bz2 linux-bec68faaf3ba74ed0dcd5dc3a881b30aec542973.zip | |
aio: io_cancel() no longer returns the io_event
Originally, io_event() was documented to return the io_event if
cancellation succeeded - the io_event wouldn't be delivered via the ring
buffer like it normally would.
But this isn't what the implementation was actually doing; the only
driver implementing cancellation, the usb gadget code, never returned an
io_event in its cancel function. And aio_complete() was recently changed
to no longer suppress event delivery if the kiocb had been cancelled.
This gets rid of the unused io_event argument to kiocb_cancel() and
kiocb->ki_cancel(), and changes io_cancel() to return -EINPROGRESS if
kiocb->ki_cancel() returned success.
Also tweak the refcounting in kiocb_cancel() to make more sense.
Signed-off-by: Kent Overstreet <koverstreet@google.com>
Cc: Zach Brown <zab@redhat.com>
Cc: Felipe Balbi <balbi@ti.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Asai Thambi S P <asamymuthupa@micron.com>
Cc: Selvan Mani <smani@micron.com>
Cc: Sam Bradshaw <sbradshaw@micron.com>
Cc: Jeff Moyer <jmoyer@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Benjamin LaHaise <bcrl@kvack.org>
Signed-off-by: Benjamin LaHaise <bcrl@kvack.org>
Diffstat (limited to 'drivers/usb/gadget')
| -rw-r--r-- | drivers/usb/gadget/inode.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/usb/gadget/inode.c b/drivers/usb/gadget/inode.c index 570c005062ab..e02c1e04529e 100644 --- a/drivers/usb/gadget/inode.c +++ b/drivers/usb/gadget/inode.c @@ -524,7 +524,7 @@ struct kiocb_priv { unsigned actual; }; -static int ep_aio_cancel(struct kiocb *iocb, struct io_event *e) +static int ep_aio_cancel(struct kiocb *iocb) { struct kiocb_priv *priv = iocb->private; struct ep_data *epdata; @@ -540,7 +540,6 @@ static int ep_aio_cancel(struct kiocb *iocb, struct io_event *e) // spin_unlock(&epdata->dev->lock); local_irq_enable(); - aio_put_req(iocb); return value; } |