diff options
| author | Hayes Wang | 2023-01-17 11:03:44 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2023-12-20 17:00:28 +0100 |
| commit | 1d82735f4bae954d5ba004994b96baec791f874f (patch) | |
| tree | 1c9afc95634013be38c557664517930d86a8035a | |
| parent | 9b3d3a7f3c4d710c1dd3f723851c3eeaf42642bc (diff) | |
r8152: avoid to change cfg for all devices
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>
| -rw-r--r-- | drivers/net/usb/r8152.c | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c index 1c6d36282e0d..03c2c159857e 100644 --- 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_interface *intf) 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; @@ -9933,6 +9941,12 @@ static int rtl8152_cfgselector_probe(struct usb_device *udev) 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; |