[linux-dvb] [Patch] saa7134: fix NULL dereference at suspend time for cards without IR receiver

[Matthias Schwarzott]

Hi there!

I played around with some new (not supported) card based on saa7134
(Avermedia dvb-s pro A700).
This lead to suspend crashing when saa7134 module was loaded.

Reason is: saa7134_suspend unconditionally calls  saa7134_ir_stop:

void saa7134_ir_stop(struct saa7134_dev *dev)
{
        if (dev->remote->polling)
                del_timer_sync(&dev->remote->timer);
}

So this must fail if dev->remote is NULL. cx88 driver seems to have the same 
layout, but this one already has the NULL-check implemented.

This patch now checks dev->remote before calling saa7134_ir_stop.

Matthias
-- 
Matthias Schwarzott (zzam)
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