On Fri, Jun 30, 2017 at 11:19 AM, Geert Uytterhoeven
<geert@xxxxxxxxxxxxxx> wrote:
> Hi Ulrich,
>
> On Fri, May 19, 2017 at 3:07 PM, Ulrich Hecht
> <ulrich.hecht+renesas@xxxxxxxxx> wrote:
>> Used to differentiate between models with 3 and 6 inputs.
>>
>> Signed-off-by: Ulrich Hecht <ulrich.hecht+renesas@xxxxxxxxx>
>> ---
>> drivers/media/i2c/adv7180.c | 2 ++
>> 1 file changed, 2 insertions(+)
>>
>> diff --git a/drivers/media/i2c/adv7180.c b/drivers/media/i2c/adv7180.c
>> index bdbbf8c..78de7dd 100644
>> --- a/drivers/media/i2c/adv7180.c
>> +++ b/drivers/media/i2c/adv7180.c
>> @@ -1452,6 +1452,8 @@ static SIMPLE_DEV_PM_OPS(adv7180_pm_ops, adv7180_suspend, adv7180_resume);
>> #ifdef CONFIG_OF
>> static const struct of_device_id adv7180_of_id[] = {
>> { .compatible = "adi,adv7180", },
>> + { .compatible = "adi,adv7180cp", },
>> + { .compatible = "adi,adv7180st", },
>> { .compatible = "adi,adv7182", },
>> { .compatible = "adi,adv7280", },
>> { .compatible = "adi,adv7280-m", },
>
> Adding compatible entries here is not sufficient, and causes a crash on
> r8a7793/gose with renesas-drivers-2017-06-27-v4.12-rc7:
>
> adv7180 2-0020: chip found @ 0x20 (e6530000.i2c)
> Unable to handle kernel NULL pointer dereference at virtual address 00000014
> pgd = c0003000
> [00000014] *pgd=80000040004003, *pmd=00000000
> Internal error: Oops: 207 [#1] SMP ARM
> Modules linked in:
> CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.12.0-rc7-rcar2-initrd #37
> Hardware name: Generic R-Car Gen2 (Flattened Device Tree)
> task: df427040 task.stack: df436000
> PC is at adv7180_probe+0x84/0x3cc
>
> In the absence of an entry in adv7180_id[], the passed i2c_device_id
> pointer is NULL, and thus dereferencing it crashes the system.
Thank you for testing this. I have sent a fix (" media: adv7180: add
missing adv7180cp, adv7180st i2c device IDs"), could you please check
if it unbreaks things for you?
CU
Uli
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