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

[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?

It has the Fixes: tag, that will do.

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