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usbdevfs: Fix broken scatter-gather transfer

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The handling of large output bulk transfers is broken; the same user
page is read over and over again. Fixed with this patch.

Cc: stable <stable@vger.kernel.org>
Acked-by: Peter Stuge <peter@stuge.se>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Henrik Rydberg 2012-10-13 12:20:36 +02:00 committed by Greg Kroah-Hartman
parent 2c78040c3e
commit 014639003c
1 changed files with 1 additions and 0 deletions
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1
drivers/usb/core/devio.c
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@ -1348,6 +1348,7 @@ static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
ret = -EFAULT;
goto error;
}
uurb->buffer += u;
}
totlen -= u;
}