[PATCH net-next 0/2] r8152: improve the code

[PATCH net-next 0/2] r8152: improve the code

[Hayes Wang]

These are some minor improvements depending on commit ec51fbd1b8a2 ("r8152:
add USB device driver for config selection").

Hayes Wang (2):
  r8152: remove rtl_vendor_mode function
  r8152: reduce the control transfer of rtl8152_get_version()

 drivers/net/usb/r8152.c | 46 +++++------------------------------------
 1 file changed, 5 insertions(+), 41 deletions(-)

-- 
2.38.1

[PATCH net-next 1/2] r8152: remove rtl_vendor_mode function

[Hayes Wang]

After commit ec51fbd1b8a2 ("r8152: add USB device driver for
config selection"), the code about changing USB configuration
in rtl_vendor_mode() wouldn't be run anymore. Therefore, the
function could be removed.

Signed-off-by: Hayes Wang <hayeswang@realtek.com>
---
 drivers/net/usb/r8152.c | 39 +--------------------------------------
 1 file changed, 1 insertion(+), 38 deletions(-)

diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c
index 4c5c1df5d7a4..6e5e12d90d47 100644
--- a/drivers/net/usb/r8152.c
+++ b/drivers/net/usb/r8152.c
@@ -8232,43 +8232,6 @@ static bool rtl_check_vendor_ok(struct usb_interface *intf)
 	return true;
 }
 
-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 rtl_check_vendor_ok(intf);
-
-	/* 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;
-	if (num_configs < 2)
-		return false;
-
-	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;
-		}
-	}
-
-	if (i == num_configs)
-		dev_err(&intf->dev, "Unexpected Device\n");
-
-	return false;
-}
-
 static int rtl8152_pre_reset(struct usb_interface *intf)
 {
 	struct r8152 *tp = usb_get_intfdata(intf);
@@ -9629,7 +9592,7 @@ static int rtl8152_probe(struct usb_interface *intf,
 	if (intf->cur_altsetting->desc.bInterfaceClass != USB_CLASS_VENDOR_SPEC)
 		return -ENODEV;
 
-	if (!rtl_vendor_mode(intf))
+	if (!rtl_check_vendor_ok(intf))
 		return -ENODEV;
 
 	usb_reset_device(udev);
-- 
2.38.1

[PATCH net-next 2/2] r8152: reduce the control transfer of rtl8152_get_version()

[Hayes Wang]

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 <hayeswang@realtek.com>
---
 drivers/net/usb/r8152.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c
index 6e5e12d90d47..decb5ba56a25 100644
--- a/drivers/net/usb/r8152.c
+++ b/drivers/net/usb/r8152.c
@@ -9581,20 +9581,21 @@ static int rtl8152_probe(struct usb_interface *intf,
 			 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) {
-- 
2.38.1

Re: [PATCH net-next 0/2] r8152: improve the code

[patchwork-bot+netdevbpf]

Hello:

This series was applied to netdev/net-next.git (master)
by Jakub Kicinski <kuba@kernel.org>:

On Thu, 19 Jan 2023 15:40:41 +0800 you wrote:
> These are some minor improvements depending on commit ec51fbd1b8a2 ("r8152:
> add USB device driver for config selection").
> 
> Hayes Wang (2):
>   r8152: remove rtl_vendor_mode function
>   r8152: reduce the control transfer of rtl8152_get_version()
> 
> [...]

Here is the summary with links:
  - [net-next,1/2] r8152: remove rtl_vendor_mode function
    https://git.kernel.org/netdev/net-next/c/95a4c1d617b9
  - [net-next,2/2] r8152: reduce the control transfer of rtl8152_get_version()
    https://git.kernel.org/netdev/net-next/c/02767440e1dd

You are awesome, thank you!
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