5.15-stable review patch. If anyone has any objections, please let me know.
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From: Hayes Wang hayeswang@realtek.com
commit 0d4cda805a183bbe523f2407edb5c14ade50b841 upstream.
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 Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- 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 @@ -9545,9 +9545,8 @@ 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; @@ -9617,10 +9616,19 @@ 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; @@ -9906,6 +9914,12 @@ 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;