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usb: wusbcore: read actual_length bytes isoc in segments

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Use the iso_frame_desc.actual_length field instead of length when
reading isoc in data segments from the HWA.  This fixes a case where the
isoc in read URB would never complete because it expected the HWA to
send more data than it actually did.  When this happened the URB would
be stuck in the driver preventing module unload and clean shutdown.

Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Thomas Pugliese 2014-02-28 15:10:26 -06:00 committed by Greg Kroah-Hartman
parent 4659a2452b
commit ecf3701ced
1 changed files with 1 additions and 1 deletions
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2
drivers/usb/wusbcore/wa-xfer.c
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@ -2159,7 +2159,7 @@ static void __wa_populate_buf_in_urb_isoc(struct wahc *wa, struct wa_xfer *xfer,
wa->buf_in_urb->transfer_dma = xfer->urb->transfer_dma +
xfer->urb->iso_frame_desc[curr_iso_frame].offset;
wa->buf_in_urb->transfer_buffer_length =
xfer->urb->iso_frame_desc[curr_iso_frame].length;
xfer->urb->iso_frame_desc[curr_iso_frame].actual_length;
wa->buf_in_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
wa->buf_in_urb->transfer_buffer = NULL;
wa->buf_in_urb->sg = NULL;