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usb: wusbcore: set packet count correctly on isoc transfers

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This patch correctly sets the dwNumOfPackets field of the HWA transfer
request for isochronous transfers with multiple segments.  Previously
all segments used the value that was set for the first segment which may
not be correct.

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 2013-12-09 14:15:15 -06:00 committed by Greg Kroah-Hartman
parent ea1af42d3d
commit 756a2eed67
1 changed files with 5 additions and 0 deletions
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5
drivers/usb/wusbcore/wa-xfer.c
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@ -1259,8 +1259,11 @@ static int __wa_xfer_setup(struct wa_xfer *xfer, struct urb *urb)
for (cnt = 1; cnt < xfer->segs; cnt++) {
struct wa_xfer_packet_info_hwaiso *packet_desc;
struct wa_seg *seg = xfer->seg[cnt];
struct wa_xfer_hwaiso *xfer_iso;
xfer_hdr = &seg->xfer_hdr;
xfer_iso = container_of(xfer_hdr,
struct wa_xfer_hwaiso, hdr);
packet_desc = ((void *)xfer_hdr) + xfer_hdr_size;
/*
* Copy values from the 0th header. Segment specific
@ -1270,6 +1273,8 @@ static int __wa_xfer_setup(struct wa_xfer *xfer, struct urb *urb)
xfer_hdr->bTransferSegment = cnt;
xfer_hdr->dwTransferLength =
cpu_to_le32(seg->isoc_size);
xfer_iso->dwNumOfPackets =
cpu_to_le32(seg->isoc_frame_count);
__wa_setup_isoc_packet_descr(packet_desc, xfer, seg);
seg->status = WA_SEG_READY;
}