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patch "media: usb: uvc: make use of new usb_endpoint_maxp_mult()" added to usb-testing

PATCH [email protected] 1 participant 1 message Nov 18, 2016

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This is a note to let you know that I've just added the patch titled

media: usb: uvc: make use of new usb_endpoint_maxp_mult()

to my usb git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git
in the usb-testing branch.

The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)

The patch will be merged to the usb-next branch sometime soon, after it passes testing, and the merge window is open.

If you have any questions about this process, please let me know.

Quoted 1 line

From 08295ee0e6976b060cd5c2a59877d8ea6379075c Mon Sep 17 00:00:00 2001

From: Felipe Balbi <[email protected]>
Date: Wed, 28 Sep 2016 13:22:53 +0300
Subject: media: usb: uvc: make use of new usb_endpoint_maxp_mult()

We have introduced a helper to calculate multiplier value from wMaxPacketSize. Start using it.

---
 drivers/media/usb/uvc/uvc_video.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
drivers/media/usb/uvc/uvc_video.c +3 -1
index b5589d5f5da4..11e0e5f4e1c2 100644
@@ -1467,6 +1467,7 @@ static unsigned int uvc_endpoint_max_bpi(struct usb_device *dev,
 					 struct usb_host_endpoint *ep)
 {
 	u16 psize;
+	u16 mult;
 
 	switch (dev->speed) {
 	case USB_SPEED_SUPER:
@@ -1474,7 +1475,8 @@ static unsigned int uvc_endpoint_max_bpi(struct usb_device *dev,
 		return le16_to_cpu(ep->ss_ep_comp.wBytesPerInterval);
 	case USB_SPEED_HIGH:
 		psize = usb_endpoint_maxp(&ep->desc);
-		return (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
+		mult = usb_endpoint_maxp_mult(&ep->desc);
+		return (psize & 0x07ff) * mult;
 	case USB_SPEED_WIRELESS:
 		psize = usb_endpoint_maxp(&ep->desc);
 		return psize;
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