netdev - Re: [PATCH] 8139too in linux-3.18.0: some potential bugs

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Message-ID: <54957E18.8000803@cogentembedded.com>
Date:	Sat, 20 Dec 2014 16:48:08 +0300
From:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:	Jia-Ju Bai <baijiaju1990@....com>, netdev@...r.kernel.org,
	jgarzik@...ox.com, shangh@...ltek.com.tw
Subject: Re: [PATCH] 8139too in linux-3.18.0: some potential bugs

On 12/20/2014 4:20 PM, Jia-Ju Bai wrote:

> I have actually tested 8139too driver on the real hardware(Realtek RTL8139D
> PCI Ethernet Controller), and find some potential bugs:
> The target file is drivers/net/ethernet/realtek/8139too.c, which is used to
> build 8139too.ko.

> (1) In the normal process of 8139too, netif_napi_add is called in
> rtl8139_init_one, but netif_napi_del is not called in rtl8139_remove_one.
> However, many other ethernet card drivers call them in pairs, even in the
> error handling paths, such as r8169 and igb.

> (2) In the normal process of 8139too, pci_enable_device and
> pci_disable_device are called in pairs in rtl8139_init_board(in
> rtl8139_init_one) and rtl8139_remove_one. However, when pci_enable_device
> has been called and pci_request_regions is failed in rtl8139_init_board,
> "err_out" segment in rtl8139_init_board is executed immediately to exit, but
> pci_disable_device is not called because "disable_dev_on_err = 0".

    Again, please fix one issue per patch.

> Meanwhile, I also write the patch to fix the bugs. I have run the patch on
> the hardware, it can work normally and fix the above bugs.

    Too bad you didn't provide a sign-off...

WBR, Sergei

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