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net: usb: ax88179_178a: fix link status when link is set to down/up 

The idea was to keep only one reset at initialization stage in order to
reduce the total delay, or the reset from usbnet_probe or the reset from
usbnet_open.

I have seen that restarting from usbnet_probe is necessary to avoid doing
too complex things. But when the link is set to down/up (for example to
configure a different mac address) the link is not correctly recovered
unless a reset is commanded from usbnet_open.

So, detect the initialization stage (first call) to not reset from
usbnet_open after the reset from usbnet_probe and after this stage, always
reset from usbnet_open too (when the link needs to be rechecked).

Apply to all the possible devices, the behavior now is going to be the same.

cc: stable@vger.kernel.org # 6.6+
Fixes: 56f78615bc ("net: usb: ax88179_178a: avoid writing the mac address before first reading")
Reported-by: Isaac Ganoung <inventor500@vivaldi.net>
Reported-by: Yongqin Liu <yongqin.liu@linaro.org>
Signed-off-by: Jose Ignacio Tornos Martinez <jtornosm@redhat.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20240510090846.328201-1-jtornosm@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Jose Ignacio Tornos Martinez 2024-05-10 11:08:28 +02:00 committed by Jakub Kicinski
parent 5eefb477d2
commit ecf848eb93
1 changed files with 26 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

37
drivers/net/usb/ax88179_178a.c
View File

@ -174,6 +174,7 @@ struct ax88179_data {
u32 wol_supported;
u32 wolopts;
u8 disconnecting;
u8 initialized;
};
struct ax88179_int_data {
@ -1673,6 +1674,18 @@ static int ax88179_reset(struct usbnet *dev)
return 0;
}
static int ax88179_net_reset(struct usbnet *dev)
{
struct ax88179_data *ax179_data = dev->driver_priv;
if (ax179_data->initialized)
ax88179_reset(dev);
else
ax179_data->initialized = 1;
return 0;
}
static int ax88179_stop(struct usbnet *dev)
{
u16 tmp16;
@ -1692,6 +1705,7 @@ static const struct driver_info ax88179_info = {
.unbind = ax88179_unbind,
.status = ax88179_status,
.link_reset = ax88179_link_reset,
.reset = ax88179_net_reset,
.stop = ax88179_stop,
.flags = FLAG_ETHER | FLAG_FRAMING_AX,
.rx_fixup = ax88179_rx_fixup,
@ -1704,6 +1718,7 @@ static const struct driver_info ax88178a_info = {
.unbind = ax88179_unbind,
.status = ax88179_status,
.link_reset = ax88179_link_reset,
.reset = ax88179_net_reset,
.stop = ax88179_stop,
.flags = FLAG_ETHER | FLAG_FRAMING_AX,
.rx_fixup = ax88179_rx_fixup,
@ -1716,7 +1731,7 @@ static const struct driver_info cypress_GX3_info = {
.unbind = ax88179_unbind,
.status = ax88179_status,
.link_reset = ax88179_link_reset,
.reset = ax88179_reset,
.reset = ax88179_net_reset,
.stop = ax88179_stop,
.flags = FLAG_ETHER | FLAG_FRAMING_AX,
.rx_fixup = ax88179_rx_fixup,
@ -1729,7 +1744,7 @@ static const struct driver_info dlink_dub1312_info = {
.unbind = ax88179_unbind,
.status = ax88179_status,
.link_reset = ax88179_link_reset,
.reset = ax88179_reset,
.reset = ax88179_net_reset,
.stop = ax88179_stop,
.flags = FLAG_ETHER | FLAG_FRAMING_AX,
.rx_fixup = ax88179_rx_fixup,
@ -1742,7 +1757,7 @@ static const struct driver_info sitecom_info = {
.unbind = ax88179_unbind,
.status = ax88179_status,
.link_reset = ax88179_link_reset,
.reset = ax88179_reset,
.reset = ax88179_net_reset,
.stop = ax88179_stop,
.flags = FLAG_ETHER | FLAG_FRAMING_AX,
.rx_fixup = ax88179_rx_fixup,
@ -1755,7 +1770,7 @@ static const struct driver_info samsung_info = {
.unbind = ax88179_unbind,
.status = ax88179_status,
.link_reset = ax88179_link_reset,
.reset = ax88179_reset,
.reset = ax88179_net_reset,
.stop = ax88179_stop,
.flags = FLAG_ETHER | FLAG_FRAMING_AX,
.rx_fixup = ax88179_rx_fixup,
@ -1768,7 +1783,7 @@ static const struct driver_info lenovo_info = {
.unbind = ax88179_unbind,
.status = ax88179_status,
.link_reset = ax88179_link_reset,
.reset = ax88179_reset,
.reset = ax88179_net_reset,
.stop = ax88179_stop,
.flags = FLAG_ETHER | FLAG_FRAMING_AX,
.rx_fixup = ax88179_rx_fixup,
@ -1781,7 +1796,7 @@ static const struct driver_info belkin_info = {
.unbind = ax88179_unbind,
.status = ax88179_status,
.link_reset = ax88179_link_reset,
.reset = ax88179_reset,
.reset = ax88179_net_reset,
.stop = ax88179_stop,
.flags = FLAG_ETHER | FLAG_FRAMING_AX,
.rx_fixup = ax88179_rx_fixup,
@ -1794,7 +1809,7 @@ static const struct driver_info toshiba_info = {
.unbind = ax88179_unbind,
.status = ax88179_status,
.link_reset = ax88179_link_reset,
.reset = ax88179_reset,
.reset = ax88179_net_reset,
.stop = ax88179_stop,
.flags = FLAG_ETHER | FLAG_FRAMING_AX,
.rx_fixup = ax88179_rx_fixup,
@ -1807,7 +1822,7 @@ static const struct driver_info mct_info = {
.unbind = ax88179_unbind,
.status = ax88179_status,
.link_reset = ax88179_link_reset,
.reset = ax88179_reset,
.reset = ax88179_net_reset,
.stop = ax88179_stop,
.flags = FLAG_ETHER | FLAG_FRAMING_AX,
.rx_fixup = ax88179_rx_fixup,
@ -1820,7 +1835,7 @@ static const struct driver_info at_umc2000_info = {
.unbind = ax88179_unbind,
.status = ax88179_status,
.link_reset = ax88179_link_reset,
.reset = ax88179_reset,
.reset = ax88179_net_reset,
.stop = ax88179_stop,
.flags = FLAG_ETHER | FLAG_FRAMING_AX,
.rx_fixup = ax88179_rx_fixup,
@ -1833,7 +1848,7 @@ static const struct driver_info at_umc200_info = {
.unbind = ax88179_unbind,
.status = ax88179_status,
.link_reset = ax88179_link_reset,
.reset = ax88179_reset,
.reset = ax88179_net_reset,
.stop = ax88179_stop,
.flags = FLAG_ETHER | FLAG_FRAMING_AX,
.rx_fixup = ax88179_rx_fixup,
@ -1846,7 +1861,7 @@ static const struct driver_info at_umc2000sp_info = {
.unbind = ax88179_unbind,
.status = ax88179_status,
.link_reset = ax88179_link_reset,
.reset = ax88179_reset,
.reset = ax88179_net_reset,
.stop = ax88179_stop,
.flags = FLAG_ETHER | FLAG_FRAMING_AX,
.rx_fixup = ax88179_rx_fixup,