netdev - Re: check for return value of clk_get() in mpc512x_can_get

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Message-ID: <4D67699D.1010301@grandegger.com>
Date:	Fri, 25 Feb 2011 09:34:37 +0100
From:	Wolfgang Grandegger <wg@...ndegger.com>
To:	Andrej Krutak <andrej.krutak@...go.com>
CC:	socketcan-core@...ts.berlios.de, netdev@...r.kernel.org
Subject: Re: check for return value of clk_get() in mpc512x_can_get_clock()

Hi,

On 02/23/2011 02:35 PM, Andrej Krutak wrote:
> Hi,
> 
> just wanted to inform you - in the mpc512x_can_get_clock() function 
> (drivers/net/can/mscan/mpc5xxx_can.c), there are calls to clg_get(), and later 
> checks
> 
> if (!sys_clk) {
> and
> if (!ref_clk) {
> 
> but these should be
> 
> if (IS_ERR(sys_clk)) {
> and
> if (IS_ERR(ref_clk)) {
> 
> (otherwise you'll get an oops if something goes wrong with clg_get()).

Thanks for the info. I'm going to prepare a patch.

Wolfgang.

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