On Fri, Aug 24, 2012 at 11:03:02AM -0700, Guenter Roeck wrote:
> The call sequence spi_alloc_master/spi_register_master/spi_unregister_master
> is complete; it reduces the device reference count to zero, which results in
> device memory being freed. The remove function accesses the freed memory aft
On Fri, Aug 24, 2012 at 01:37:39PM -0700, Guenter Roeck wrote:
> For some reason most spi drivers have similar problems. I learned it
> the hard way when I tested my own driver, and decided to fix as many
> drivers as I can. Which is why you see all those patches from me
> lately.
It's not exactl
On Sat, Aug 25, 2012 at 12:07:37AM +0200, Marek Vasut wrote:
[ ... ]
>
> > On a side note, at least some of the spi bitbang drivers have a similar
> > problem. Unfortunately, I can not fix it right now because I have no means
> > to test it, and have no idea what exactly is _supposed_ to happen.
Dear Guenter Roeck,
> On Fri, Aug 24, 2012 at 10:10:12PM +0200, Marek Vasut wrote:
> > Dear Guenter Roeck,
> >
> > > The call sequence
> > > spi_alloc_master/spi_register_master/spi_unregister_master is complete;
> > > it reduces the device reference count to zero, which results in device
> > > m
On Fri, Aug 24, 2012 at 10:10:12PM +0200, Marek Vasut wrote:
> Dear Guenter Roeck,
>
> > The call sequence
> > spi_alloc_master/spi_register_master/spi_unregister_master is complete; it
> > reduces the device reference count to zero, which results in device memory
> > being freed. The remove funct
Dear Guenter Roeck,
> The call sequence
> spi_alloc_master/spi_register_master/spi_unregister_master is complete; it
> reduces the device reference count to zero, which results in device memory
> being freed. The remove function accesses the freed memory after the call
> to spi_unregister_master()
The call sequence spi_alloc_master/spi_register_master/spi_unregister_master
is complete; it reduces the device reference count to zero, which results in
device memory being freed. The remove function accesses the freed memory after
the call to spi_unregister_master(), _and_ it calls spi_master_put
