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usb: core: urb make use of usb_endpoint_maxp_mult

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Since usb_endpoint_maxp now returns only lower 11 bits mult
calculation here isn't correct anymore and that breaks webcam
for me. Patch make use of usb_endpoint_maxp_mult instead of
direct calculation.

Fixes: abb621844f6a ("usb: ch9: make usb_endpoint_maxp() return
       only packet size")

Signed-off-by: Mike Krinkin <krinkin.m.u@gmail.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Mike Krinkin 2016-11-13 13:31:16 +03:00 committed by Felipe Balbi
parent 7ac51a12ea
commit 5909cbc881
1 changed files with 2 additions and 5 deletions
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7
drivers/usb/core/urb.c
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@ -407,11 +407,8 @@ int usb_submit_urb(struct urb *urb, gfp_t mem_flags)
} }
/* "high bandwidth" mode, 1-3 packets/uframe? */ /* "high bandwidth" mode, 1-3 packets/uframe? */
if (dev->speed == USB_SPEED_HIGH) { if (dev->speed == USB_SPEED_HIGH)
int mult = 1 + ((max >> 11) & 0x03); max *= usb_endpoint_maxp_mult(&ep->desc);
max &= 0x07ff;
max *= mult;
}
if (urb->number_of_packets <= 0) if (urb->number_of_packets <= 0)
return -EINVAL; return -EINVAL;