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From 579f58dd2819910354753bc5489fc1588fe9cfe2 Mon Sep 17 00:00:00 2001
From: Hayes Wang <hayeswang@realtek.com>
Date: Fri, 16 Apr 2021 16:04:37 +0800
Subject: [PATCH] r8152: search the configuration of vendor mode
commit c2198943e33b100ed21dfb636c8fa6baef841e9d upstream.
The vendor mode is not always at config #1, so it is necessary to
set the correct configuration number.
Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
drivers/net/usb/r8152.c | 39 +++++++++++++++++++++++++++++++++++----
1 file changed, 35 insertions(+), 4 deletions(-)
--- a/drivers/net/usb/r8152.c
+++ b/drivers/net/usb/r8152.c
@@ -30,7 +30,7 @@
#include <linux/usb/r8152.h>
/* Information for net-next */
-#define NETNEXT_VERSION "11"
+#define NETNEXT_VERSION "12"
/* Information for net */
#define NET_VERSION "11"
@@ -8136,6 +8136,39 @@ static void r8156b_init(struct r8152 *tp
tp->coalesce = 15000; /* 15 us */
}
+static bool rtl_vendor_mode(struct usb_interface *intf)
+{
+ struct usb_host_interface *alt = intf->cur_altsetting;
+ struct usb_device *udev;
+ struct usb_host_config *c;
+ int i, num_configs;
+
+ if (alt->desc.bInterfaceClass == USB_CLASS_VENDOR_SPEC)
+ return true;
+
+ /* The vendor mode is not always config #1, so to find it out. */
+ udev = interface_to_usbdev(intf);
+ c = udev->config;
+ num_configs = udev->descriptor.bNumConfigurations;
+ for (i = 0; i < num_configs; (i++, c++)) {
+ struct usb_interface_descriptor *desc = NULL;
+
+ if (c->desc.bNumInterfaces > 0)
+ desc = &c->intf_cache[0]->altsetting->desc;
+ else
+ continue;
+
+ if (desc->bInterfaceClass == USB_CLASS_VENDOR_SPEC) {
+ usb_driver_set_configuration(udev, c->desc.bConfigurationValue);
+ break;
+ }
+ }
+
+ WARN_ON_ONCE(i == num_configs);
+
+ return false;
+}
+
static int rtl8152_pre_reset(struct usb_interface *intf)
{
struct r8152 *tp = usb_get_intfdata(intf);
@@ -9374,10 +9407,8 @@ static int rtl8152_probe(struct usb_inte
if (version == RTL_VER_UNKNOWN)
return -ENODEV;
- if (udev->actconfig->desc.bConfigurationValue != 1) {
- usb_driver_set_configuration(udev, 1);
+ if (!rtl_vendor_mode(intf))
return -ENODEV;
- }
if (intf->cur_altsetting->desc.bNumEndpoints < 3)
return -ENODEV;
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