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Message-Id: <20190124.223340.1801961504003089813.davem@davemloft.net>
Date: Thu, 24 Jan 2019 22:33:40 -0800 (PST)
From: David Miller <davem@...emloft.net>
To: zhang.run@....com.cn
Cc: marcel.ziswiler@...adex.com, lynxis@...0.eu,
linux-usb@...r.kernel.org, netdev@...r.kernel.org,
linux-kernel@...r.kernel.org, xue.zhihong@....com.cn,
wang.yi59@....com.cn
Subject: Re: [PATCH] net: usb: asix: ax88772_bind return error when
hw_reset fail
From: Zhang Run <zhang.run@....com.cn>
Date: Thu, 24 Jan 2019 13:48:49 +0800
> The ax88772_bind() should return error code immediately when the PHY
> was not reset properly through ax88772a_hw_reset().
> Otherwise, The asix_get_phyid() will block when get the PHY
> Identifier from the PHYSID1 MII registers through asix_mdio_read()
> due to the PHY isn't ready. Furthermore, it will produce a lot of
> error message cause system crash.As follows:
> asix 1-1:1.0 (unnamed net_device) (uninitialized): Failed to write
> reg index 0x0000: -71
> asix 1-1:1.0 (unnamed net_device) (uninitialized): Failed to send
> software reset: ffffffb9
> asix 1-1:1.0 (unnamed net_device) (uninitialized): Failed to write
> reg index 0x0000: -71
> asix 1-1:1.0 (unnamed net_device) (uninitialized): Failed to enable
> software MII access
> asix 1-1:1.0 (unnamed net_device) (uninitialized): Failed to read
> reg index 0x0000: -71
> asix 1-1:1.0 (unnamed net_device) (uninitialized): Failed to write
> reg index 0x0000: -71
> asix 1-1:1.0 (unnamed net_device) (uninitialized): Failed to enable
> software MII access
> asix 1-1:1.0 (unnamed net_device) (uninitialized): Failed to read
> reg index 0x0000: -71
> ...
>
> Signed-off-by: Zhang Run <zhang.run@....com.cn>
> Reviewed-by: Yang Wei <yang.wei9@....com.cn>
Applied.
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