Re: [PATCH 4.1 108/159] stmmac: fix check for phydev being open

Sergei Shtylyov
2015-09-30T11:25:48Z

Hello.

On 9/26/2015 11:55 PM, Greg Kroah-Hartman wrote:

> 4.1-stable review patch. If anyone has any objections, please let me know.

NAK on the same grounds as the 3.x patches. of_phy_connect() isn't called
yet. If the patch has been committed already, it's OK -- it should do no harm.

> ------------------
>
> From: Alexey Brodkin <Alexey.Brodkin@synopsys.com>
>
> commit dfc50fcaad574e5c8c85cbc83eca1426b2413fa4 upstream.
>
> Current check of phydev with IS_ERR(phydev) may make not much sense
> because of_phy_connect() returns NULL on failure instead of error value.
>
> Still for checking result of phy_connect() IS_ERR() makes perfect sense.
>
> So let's use combined check IS_ERR_OR_NULL() that covers both cases.
>
> Cc: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
> Cc: Giuseppe Cavallaro <peppe.cavallaro@st.com>
> Cc: linux-kernel@vger.kernel.org
> Cc: David Miller <davem@davemloft.net>
> Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
> Signed-off-by: David S. Miller <davem@davemloft.net>
> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
>
> ---
> drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 5 ++++-
> 1 file changed, 4 insertions(+), 1 deletion(-)
>
> --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> @@ -829,8 +829,11 @@ static int stmmac_init_phy(struct net_de
>
> phydev = phy_connect(dev, phy_id_fmt, &stmmac_adjust_link, interface);
>
> - if (IS_ERR(phydev)) {
> + if (IS_ERR_OR_NULL(phydev)) {
> pr_err("%s: Could not attach to PHY\n", dev->name);
> + if (!phydev)
> + return -ENODEV;
> +
> return PTR_ERR(phydev);
> }
>

MBR, Sergei