From 5797663674b0d802f275761e71593b32b0849242 Mon Sep 17 00:00:00 2001 From: Bhupesh Sharma Date: Fri, 1 Jun 2012 15:08:55 +0530 Subject: usb: gadget: uvc: Use macro for interrupt endpoint status size instead of using a MAGIC number This patch adds a MACRO for the UVC video control status (interrupt) endpoint and removes the magic number which was being used earlier. Some UDCs have issues supporting an interrupt IN endpoint having a max packet size less than a particular value (say 32). It is easier in that case to simply change the MACRO value instead of changing the max packet size value at a number of locations. Signed-off-by: Bhupesh Sharma Signed-off-by: Felipe Balbi --- drivers/usb/gadget/f_uvc.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'drivers/usb/gadget/f_uvc.c') diff --git a/drivers/usb/gadget/f_uvc.c b/drivers/usb/gadget/f_uvc.c index 054c35a..dd7d7a9 100644 --- a/drivers/usb/gadget/f_uvc.c +++ b/drivers/usb/gadget/f_uvc.c @@ -59,6 +59,8 @@ static struct usb_gadget_strings *uvc_function_strings[] = { #define UVC_INTF_VIDEO_CONTROL 0 #define UVC_INTF_VIDEO_STREAMING 1 +#define STATUS_BYTECOUNT 16 /* 16 bytes status */ + static struct usb_interface_assoc_descriptor uvc_iad __initdata = { .bLength = sizeof(uvc_iad), .bDescriptorType = USB_DT_INTERFACE_ASSOCIATION, @@ -87,7 +89,7 @@ static struct usb_endpoint_descriptor uvc_control_ep __initdata = { .bDescriptorType = USB_DT_ENDPOINT, .bEndpointAddress = USB_DIR_IN, .bmAttributes = USB_ENDPOINT_XFER_INT, - .wMaxPacketSize = cpu_to_le16(16), + .wMaxPacketSize = cpu_to_le16(STATUS_BYTECOUNT), .bInterval = 8, }; @@ -95,7 +97,7 @@ static struct uvc_control_endpoint_descriptor uvc_control_cs_ep __initdata = { .bLength = UVC_DT_CONTROL_ENDPOINT_SIZE, .bDescriptorType = USB_DT_CS_ENDPOINT, .bDescriptorSubType = UVC_EP_INTERRUPT, - .wMaxTransferSize = cpu_to_le16(16), + .wMaxTransferSize = cpu_to_le16(STATUS_BYTECOUNT), }; static struct usb_interface_descriptor uvc_streaming_intf_alt0 __initdata = { -- cgit v1.1