[PATCH] ARM: OMAP: avoid NULL pointer dereference when no PMIC is configured
Daniel Mack
zonque at gmail.com
Tue Dec 20 05:00:31 EST 2011
Hi Igor,
On 12/19/2011 09:10 AM, Igor Grinberg wrote:
> On 12/18/11 21:13, Daniel Mack wrote:
>> Signed-off-by: Daniel Mack <zonque at gmail.com>
>> Cc: Tony Lindgren <tony at atomide.com>
>> ---
>> arch/arm/mach-omap2/vp.c | 5 +++++
>> 1 files changed, 5 insertions(+), 0 deletions(-)
>>
>> diff --git a/arch/arm/mach-omap2/vp.c b/arch/arm/mach-omap2/vp.c
>> index 66bd700..5407173 100644
>> --- a/arch/arm/mach-omap2/vp.c
>> +++ b/arch/arm/mach-omap2/vp.c
>> @@ -41,6 +41,11 @@ void __init omap_vp_init(struct voltagedomain *voltdm)
>> u32 val, sys_clk_rate, timeout, waittime;
>> u32 vddmin, vddmax, vstepmin, vstepmax;
>>
>> + if (!voltdm->pmic) {
>> + pr_err("%s: No PMIC configured.\n", __func__, voltdm->name);
>
> You are passing two parameters to pr_err(), but use only one...
Of course not. I wonder why the compiler didn't yell at me about that.
> Also, I don't know if this is the right thing to do here,
> so Cc'ed Paul and Kevin.
That is the other question ideed. In the case I was facing on a custom
board, I was running into this without any configured PMIC. Clearly,
derferencing a NULL pointer here is no good thing to do.
Thanks,
Daniel
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