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[media] gspca - main: isoc mode devices are never low speed

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Quoting from the official usb 20 spec:
"5.6.4 Isochronous Transfer Bus Access Constraints

Isochronous transfers can only be used by full-speed and high-speed devices."

This means that for code paths which are isoc mode only, we don't need to
check for the device being low speed, simplifying the code.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jean-François Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hans de Goede 2012-01-01 13:34:58 -03:00 committed by Mauro Carvalho Chehab
parent 2d39059a65
commit 51e23be284
1 changed files with 1 additions and 4 deletions
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5
drivers/media/video/gspca/gspca.c
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@ -818,10 +818,7 @@ static int create_urbs(struct gspca_dev *gspca_dev,
ep->desc.bEndpointAddress); ep->desc.bEndpointAddress);
urb->transfer_flags = URB_ISO_ASAP urb->transfer_flags = URB_ISO_ASAP
| URB_NO_TRANSFER_DMA_MAP; | URB_NO_TRANSFER_DMA_MAP;
if (gspca_dev->dev->speed == USB_SPEED_LOW) urb->interval = 1 << (ep->desc.bInterval - 1);
urb->interval = ep->desc.bInterval;
else
urb->interval = 1 << (ep->desc.bInterval - 1);
urb->complete = isoc_irq; urb->complete = isoc_irq;
urb->number_of_packets = npkt; urb->number_of_packets = npkt;
for (i = 0; i < npkt; i++) { for (i = 0; i < npkt; i++) {