[PATCH] phy: ti: phy-omap-usb2: Fix NULL pointer dereference for SRP

[Vinod Koul]

On Sun, 28 Jan 2024 14:05:54 +0200, Tony Lindgren wrote:
> If the external phy working together with phy-omap-usb2 does not implement
> send_srp(), we may still attempt to call it. This can happen on an idle
> Ethernet gadget triggering a wakeup for example:
> 
> configfs-gadget.g1 gadget.0: ECM Suspend
> configfs-gadget.g1 gadget.0: Port suspended. Triggering wakeup
> ...
> Unable to handle kernel NULL pointer dereference at virtual address
> 00000000 when execute
> ...
> PC is at 0x0
> LR is at musb_gadget_wakeup+0x1d4/0x254 [musb_hdrc]
> ...
> musb_gadget_wakeup [musb_hdrc] from usb_gadget_wakeup+0x1c/0x3c [udc_core]
> usb_gadget_wakeup [udc_core] from eth_start_xmit+0x3b0/0x3d4 [u_ether]
> eth_start_xmit [u_ether] from dev_hard_start_xmit+0x94/0x24c
> dev_hard_start_xmit from sch_direct_xmit+0x104/0x2e4
> sch_direct_xmit from __dev_queue_xmit+0x334/0xd88
> __dev_queue_xmit from arp_solicit+0xf0/0x268
> arp_solicit from neigh_probe+0x54/0x7c
> neigh_probe from __neigh_event_send+0x22c/0x47c
> __neigh_event_send from neigh_resolve_output+0x14c/0x1c0
> neigh_resolve_output from ip_finish_output2+0x1c8/0x628
> ip_finish_output2 from ip_send_skb+0x40/0xd8
> ip_send_skb from udp_send_skb+0x124/0x340
> udp_send_skb from udp_sendmsg+0x780/0x984
> udp_sendmsg from __sys_sendto+0xd8/0x158
> __sys_sendto from ret_fast_syscall+0x0/0x58
> 
> [...]

Applied, thanks!

[1/1] phy: ti: phy-omap-usb2: Fix NULL pointer dereference for SRP
      commit: 7104ba0f1958adb250319e68a15eff89ec4fd36d

Best regards,
-- 
~Vinod