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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 <[email protected]>
Acked-by: Peter Stuge <[email protected]>
Acked-by: Hans de Goede <[email protected]>
Acked-by: Alan Stern <[email protected]>
Signed-off-by: Henrik Rydberg <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Henrik Rydberg 2012-10-13 12:20:36 +02:00 • committed by Greg Kroah-Hartman
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;
}