[PATCH RFC 1/3] i2c: bcm2835: Avoid possible NULL ptr dereference

[Stefan Wahren]

Hi Greg,
hi Wolfram,

Am 20.02.2017 um 19:22 schrieb Wolfram Sang:
> On Thu, Feb 16, 2017 at 09:20:45PM +0000, Stefan Wahren wrote:
>> Since commit e2474541032d ("bcm2835: Fix hang for writing messages
>> larger than 16 bytes") the interrupt handler is prone to a possible
>> NULL pointer dereference. This could happen if an interrupt fires
>> before curr_msg is set by bcm2835_i2c_xfer_msg() and randomly occurs
>> on the RPi 3. Even this is an unexpected behavior the driver must
>> handle that with an error instead of a crash.
>>
>> CC: Noralf Trønnes <noralf at tronnes.org>
>> CC: Martin Sperl <kernel at martin.sperl.org>
>> Reported-by: Peter Robinson <pbrobinson at gmail.com>
>> Fixes: e2474541032d ("bcm2835: Fix hang for writing messages larger than 16 bytes")
>> Signed-off-by: Stefan Wahren <stefan.wahren at i2se.com>
> Applied to for-next, thanks (will be in 4.11)!
>

since this patch is too late for 4.10, should i resent with CC to stable 
in order to get it into the next 4.10 release?

Stefan