From: Joe Swantek <joseph.swantek@motorola.com>
Date: Tue, 15 Dec 2009 12:17:40 +0000 (-0500)
Subject: USB: composite: Allow configurations to handle unhandled setup requests
X-Git-Tag: firefly_0821_release~9833^2~5^2~285
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=19e2a3e2bad18d2669adc8bd0e81b526a750a66e;p=firefly-linux-kernel-4.4.55.git

USB: composite: Allow configurations to handle unhandled setup requests

Signed-off-by: Mike Lockwood <lockwood@android.com>
---

diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c
index 1659a11dc18c..e69a0ac3bf6f 100644
--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -937,6 +937,25 @@ unknown:
 				value = c->setup(c, ctrl);
 		}
 
+		/* If the vendor request is not processed (value < 0),
+		 * call all device registered configure setup callbacks
+		 * to process it.
+		 * This is used to handle the following cases:
+		 * - vendor request is for the device and arrives before
+		 * setconfiguration.
+		 * - Some devices are required to handle vendor request before
+		 * setconfiguration such as MTP, USBNET.
+		 */
+
+		if (value < 0) {
+			struct usb_configuration        *cfg;
+
+			list_for_each_entry(cfg, &cdev->configs, list) {
+			if (cfg && cfg->setup)
+				value = cfg->setup(cfg, ctrl);
+			}
+		}
+
 		goto done;
 	}