linux-kernel - patch usb-core-config.c-usb_get_configuration-simplified.patch added to gregkh-2.6 tree

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Date:	Thu, 29 Apr 2010 16:21:08 -0700
From:	<gregkh@...e.de>
To:	mina86@...a86.com, gregkh@...e.de, Linux-kernel@...r.kernel.org,
	stern@...land.harvard.edu
Subject: patch usb-core-config.c-usb_get_configuration-simplified.patch added to gregkh-2.6 tree


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

    Subject: USB: core: config.c: usb_get_configuration() simplified

to my gregkh-2.6 tree.  Its filename is

    usb-core-config.c-usb_get_configuration-simplified.patch

This tree can be found at 
    http://www.kernel.org/pub/linux/kernel/people/gregkh/gregkh-2.6/patches/


>From mina86@...a86.com  Thu Apr 29 16:05:40 2010
From: Michal Nazarewicz <mina86@...a86.com>
Date: Sat, 17 Apr 2010 17:12:58 +0200
Subject: USB: core: config.c: usb_get_configuration() simplified
To: Alan Stern <stern@...land.harvard.edu>
Cc: linux-usb@...r.kernel.org, <Linux-kernel@...r.kernel.org>, Greg Kroah-Hartman <gregkh@...e.de>
Message-ID: <87sk6uaz9h.fsf@...in.mina86.com>


usb_gat_configuratio() used two pointers to point to the same
memory.  Code simplified, by removing one of them.

Signed-off-by: Michal Nazarewicz <mina86@...a86.com>
Cc: Alan Stern <stern@...land.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 drivers/usb/core/config.c |   10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

--- a/drivers/usb/core/config.c
+++ b/drivers/usb/core/config.c
@@ -735,7 +735,6 @@ int usb_get_configuration(struct usb_dev
 	int ncfg = dev->descriptor.bNumConfigurations;
 	int result = 0;
 	unsigned int cfgno, length;
-	unsigned char *buffer;
 	unsigned char *bigbuffer;
 	struct usb_config_descriptor *desc;
 
@@ -764,17 +763,16 @@ int usb_get_configuration(struct usb_dev
 	if (!dev->rawdescriptors)
 		goto err2;
 
-	buffer = kmalloc(USB_DT_CONFIG_SIZE, GFP_KERNEL);
-	if (!buffer)
+	desc = kmalloc(USB_DT_CONFIG_SIZE, GFP_KERNEL);
+	if (!desc)
 		goto err2;
-	desc = (struct usb_config_descriptor *)buffer;
 
 	result = 0;
 	for (; cfgno < ncfg; cfgno++) {
 		/* We grab just the first descriptor so we know how long
 		 * the whole configuration is */
 		result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno,
-		    buffer, USB_DT_CONFIG_SIZE);
+		    desc, USB_DT_CONFIG_SIZE);
 		if (result < 0) {
 			dev_err(ddev, "unable to read config index %d "
 			    "descriptor/%s: %d\n", cfgno, "start", result);
@@ -823,7 +821,7 @@ int usb_get_configuration(struct usb_dev
 	result = 0;
 
 err:
-	kfree(buffer);
+	kfree(desc);
 out_not_authorized:
 	dev->descriptor.bNumConfigurations = cfgno;
 err2:

--
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