This is a note to let you know that I've just added the patch titled
net: usb: ax88179_178a: avoid writing the mac address before first reading
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
net-usb-ax88179_178a-avoid-writing-the-mac-address-before-first-reading.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 56f78615bcb1c3ba58a5d9911bad3d9185cf141b Mon Sep 17 00:00:00 2001
From: Jose Ignacio Tornos Martinez <jtornosm@xxxxxxxxxx>
Date: Wed, 17 Apr 2024 10:55:13 +0200
Subject: net: usb: ax88179_178a: avoid writing the mac address before first reading
From: Jose Ignacio Tornos Martinez <jtornosm@xxxxxxxxxx>
commit 56f78615bcb1c3ba58a5d9911bad3d9185cf141b upstream.
After the commit d2689b6a86b9 ("net: usb: ax88179_178a: avoid two
consecutive device resets"), reset operation, in which the default mac
address from the device is read, is not executed from bind operation and
the random address, that is pregenerated just in case, is direclty written
the first time in the device, so the default one from the device is not
even read. This writing is not dangerous because is volatile and the
default mac address is not missed.
In order to avoid this and keep the simplification to have only one
reset and reduce the delays, restore the reset from bind operation and
remove the reset that is commanded from open operation. The behavior is
the same but everything is ready for usbnet_probe.
Tested with ASIX AX88179 USB Gigabit Ethernet devices.
Restore the old behavior for the rest of possible devices because I don't
have the hardware to test.
cc: stable@xxxxxxxxxxxxxxx # 6.6+
Fixes: d2689b6a86b9 ("net: usb: ax88179_178a: avoid two consecutive device resets")
Reported-by: Jarkko Palviainen <jarkko.palviainen@xxxxxxxxx>
Signed-off-by: Jose Ignacio Tornos Martinez <jtornosm@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20240417085524.219532-1-jtornosm@xxxxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/usb/ax88179_178a.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/net/usb/ax88179_178a.c
+++ b/drivers/net/usb/ax88179_178a.c
@@ -1317,6 +1317,8 @@ static int ax88179_bind(struct usbnet *d
netif_set_tso_max_size(dev->net, 16384);
+ ax88179_reset(dev);
+
return 0;
}
@@ -1695,7 +1697,6 @@ static const struct driver_info ax88179_
.unbind = ax88179_unbind,
.status = ax88179_status,
.link_reset = ax88179_link_reset,
- .reset = ax88179_reset,
.stop = ax88179_stop,
.flags = FLAG_ETHER | FLAG_FRAMING_AX,
.rx_fixup = ax88179_rx_fixup,
@@ -1708,7 +1709,6 @@ static const struct driver_info ax88178a
.unbind = ax88179_unbind,
.status = ax88179_status,
.link_reset = ax88179_link_reset,
- .reset = ax88179_reset,
.stop = ax88179_stop,
.flags = FLAG_ETHER | FLAG_FRAMING_AX,
.rx_fixup = ax88179_rx_fixup,
Patches currently in stable-queue which might be from jtornosm@xxxxxxxxxx are
queue-6.6/net-usb-ax88179_178a-avoid-writing-the-mac-address-before-first-reading.patch
