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From 0d4cda805a183bbe523f2407edb5c14ade50b841 Mon Sep 17 00:00:00 2001
From: Hayes Wang <hayeswang@realtek.com>
Date: Tue, 17 Jan 2023 11:03:44 +0800
Subject: [PATCH] r8152: avoid to change cfg for all devices
The rtl8152_cfgselector_probe() should set the USB configuration to the
vendor mode only for the devices which the driver (r8152) supports.
Otherwise, no driver would be used for such devices.
Fixes: ec51fbd1b8a2 ("r8152: add USB device driver for config selection")
Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
drivers/net/usb/r8152.c | 20 +++++++++++++++++---
1 file changed, 17 insertions(+), 3 deletions(-)
--- a/drivers/net/usb/r8152.c
+++ b/drivers/net/usb/r8152.c
@@ -9556,9 +9556,8 @@ static int rtl_fw_init(struct r8152 *tp)
return 0;
}
-u8 rtl8152_get_version(struct usb_interface *intf)
+static u8 __rtl_get_hw_ver(struct usb_device *udev)
{
- struct usb_device *udev = interface_to_usbdev(intf);
u32 ocp_data = 0;
__le32 *tmp;
u8 version;
@@ -9628,10 +9627,19 @@ u8 rtl8152_get_version(struct usb_interf
break;
default:
version = RTL_VER_UNKNOWN;
- dev_info(&intf->dev, "Unknown version 0x%04x\n", ocp_data);
+ dev_info(&udev->dev, "Unknown version 0x%04x\n", ocp_data);
break;
}
+ return version;
+}
+
+u8 rtl8152_get_version(struct usb_interface *intf)
+{
+ u8 version;
+
+ version = __rtl_get_hw_ver(interface_to_usbdev(intf));
+
dev_dbg(&intf->dev, "Detected version 0x%04x\n", version);
return version;
@@ -9931,6 +9939,12 @@ static int rtl8152_cfgselector_probe(str
struct usb_host_config *c;
int i, num_configs;
+ /* Switch the device to vendor mode, if and only if the vendor mode
+ * driver supports it.
+ */
+ if (__rtl_get_hw_ver(udev) == RTL_VER_UNKNOWN)
+ return 0;
+
/* The vendor mode is not always config #1, so to find it out. */
c = udev->config;
num_configs = udev->descriptor.bNumConfigurations;
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