AcoSail/kernel_optimize_test
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gadgetfs: Fixed bug in ep_aio_read_retry.

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I don't think the current code works with multiple iovecs.
The original would just copy the first part of priv->buf
over and over into multiple iovecs.

Signed-off-by: Sarah Bailey <saharabeara@gmail.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Sarah Bailey 2007-02-22 22:36:21 -08:00 committed by Greg Kroah-Hartman
parent 4ef2e23f03
commit 50f97a1f82
1 changed files with 4 additions and 1 deletions
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5
drivers/usb/gadget/inode.c
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@ -553,6 +553,7 @@ static ssize_t ep_aio_read_retry(struct kiocb *iocb)
{
struct kiocb_priv *priv = iocb->private;
ssize_t len, total;
void *to_copy;
int i;
/* we "retry" to get the right mm context for this: */
@ -560,10 +561,11 @@ static ssize_t ep_aio_read_retry(struct kiocb *iocb)
/* copy stuff into user buffers */
total = priv->actual;
len = 0;
to_copy = priv->buf;
for (i=0; i < priv->nr_segs; i++) {
ssize_t this = min((ssize_t)(priv->iv[i].iov_len), total);
if (copy_to_user(priv->iv[i].iov_base, priv->buf, this)) {
if (copy_to_user(priv->iv[i].iov_base, to_copy, this)) {
if (len == 0)
len = -EFAULT;
break;
@ -571,6 +573,7 @@ static ssize_t ep_aio_read_retry(struct kiocb *iocb)
total -= this;
len += this;
to_copy += this;
if (total == 0)
break;
}