From 02767440e1dda9861a11ca1dbe0f19a760b1d5c2 Mon Sep 17 00:00:00 2001 From: Hayes Wang Date: Thu, 19 Jan 2023 15:40:43 +0800 Subject: [PATCH] r8152: reduce the control transfer of rtl8152_get_version() Reduce the control transfer by moving calling rtl8152_get_version() in rtl8152_probe(). This could prevent from calling rtl8152_get_version() for unnecessary situations. For example, after setting config #2 for the device, there are two interfaces and rtl8152_probe() may be called twice. However, we don't need to call rtl8152_get_version() for this situation. Signed-off-by: Hayes Wang Signed-off-by: Jakub Kicinski --- drivers/net/usb/r8152.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) --- a/drivers/net/usb/r8152.c +++ b/drivers/net/usb/r8152.c @@ -9602,20 +9602,21 @@ static int rtl8152_probe(struct usb_inte const struct usb_device_id *id) { struct usb_device *udev = interface_to_usbdev(intf); - u8 version = rtl8152_get_version(intf); struct r8152 *tp; struct net_device *netdev; + u8 version; int ret; - if (version == RTL_VER_UNKNOWN) - return -ENODEV; - if (intf->cur_altsetting->desc.bInterfaceClass != USB_CLASS_VENDOR_SPEC) return -ENODEV; if (!rtl_check_vendor_ok(intf)) return -ENODEV; + version = rtl8152_get_version(intf); + if (version == RTL_VER_UNKNOWN) + return -ENODEV; + usb_reset_device(udev); netdev = alloc_etherdev(sizeof(struct r8152)); if (!netdev) {