Re: [PATCH V2 1/2] usb: gadget: u_ether: Improve print in gether_setup_name_default()

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On 17/01/2023 15:04, Greg Kroah-Hartman wrote:
On Mon, Jan 16, 2023 at 03:55:44PM +0000, Jon Hunter wrote:
The print in in gether_setup_name_default() does not provide any useful
information because a random MAC address will always be generated when
calling this function. Rather than removing the print, update the print
to show MAC address that is generated which is similar to other ethernet
drivers.

Finally, given that the strings 'self' and 'host' are static we do not
need to pass these strings as an arguments.

Signed-off-by: Jon Hunter <jonathanh@xxxxxxxxxx>
---
V1 -> V2: Added this patch

  drivers/usb/gadget/function/u_ether.c | 4 ++--
  1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/gadget/function/u_ether.c b/drivers/usb/gadget/function/u_ether.c
index 8f12f3f8f6ee..be8e7b448933 100644
--- a/drivers/usb/gadget/function/u_ether.c
+++ b/drivers/usb/gadget/function/u_ether.c
@@ -845,13 +845,13 @@ struct net_device *gether_setup_name_default(const char *netname)
  	snprintf(net->name, sizeof(net->name), "%s%%d", netname);
eth_random_addr(dev->dev_mac);
-	pr_warn("using random %s ethernet address\n", "self");
+	pr_warn("using random self ethernet address %pM\n", dev->dev_mac);

If you are going to fix these up, please use dev_warn() and friends,
don't use "raw" pr_* calls in a driver.


I had a look at that, but I don't think we can in this case. The 'dev' structure you see above is of type 'struct eth_dev' and not 'struct device'. In other places in the driver where dev_warn is used the device structure comes from the 'struct usb_gadget' but FWICT this is not initialised in the above function.

Jon

--
nvpublic



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