Re: [PATCH 3/3] nfc: trf7970a: Prevent repeated polling from crashing the kernel

From: Mark Greer
Date: Thu Dec 15 2016 - 20:18:35 EST

On Thu, Dec 15, 2016 at 05:30:44PM -0500, Geoff Lansberry wrote:
> From: Jaret Cantu <jaret.cantu@xxxxxxxxxxx>
> Repeated polling attempts cause a NULL dereference error to occur.
> This is because the curent state of the trf7970a is reading but
> a request has been made to send a command.
> The solution is to properly kill the waiting reading (workqueue)
> before failing on the send.

Maybe its just me but I find this description a little hard to grok.
Mind reworking it?

The patch itself looks fine.