[PATCH 2/6] raspberry-pi: add leds support

[Antony Pavlov]

On Mon, 19 Jan 2015 08:51:44 +0100
Sascha Hauer <s.hauer at pengutronix.de> wrote:

> On Mon, Jan 19, 2015 at 02:08:58AM +0400, Antony Pavlov wrote:
> > On Tue, 13 Jan 2015 07:33:06 +0100
> > Jean-Christophe PLAGNIOL-VILLARD <plagnioj at jcrosoft.com> wrote:
> > 
> > > Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj at jcrosoft.com>
> > > ---
> > >  arch/arm/boards/raspberry-pi/rpi.c | 55 ++++++++++++++++++++++++++++++++++++++
> > >  1 file changed, 55 insertions(+)
> > > 
> > > diff --git a/arch/arm/boards/raspberry-pi/rpi.c b/arch/arm/boards/raspberry-pi/rpi.c
> > > index ae1e92a..81b485e 100644
> > > --- a/arch/arm/boards/raspberry-pi/rpi.c
> > > +++ b/arch/arm/boards/raspberry-pi/rpi.c
> > ...
> > > @@ -160,6 +205,15 @@ unknown_rev:
> > >  	barebox_set_model("RaspberryPi (BCM2835/ARM1176JZF-S)");
> > >  }
> > >  
> > > +static void rpi_model_init(void)
> > > +{
> > > +	if (!models[rpi_board_rev].init)
> > > +		return;
> > 
> > Houston, we have a problem here.
> > Please see current arch/arm/boards/raspberry-pi/rpi.c:
> > 
> > /* See comments in mbox.h for data source */
> > static const struct {
> > 	const char *name;
> > 	bool has_onboard_eth;
> > 	void (*init)(void);
> > } models[] = {
> > 	RPI_MODEL(0, "Unknown model", NULL),
> > 	RPI_MODEL(BCM2835_BOARD_REV_B_I2C0_2, "Model B (no P5)", NULL),
> > 	RPI_MODEL(BCM2835_BOARD_REV_B_I2C0_3, "Model B (no P5)", NULL),
> > 	RPI_MODEL(BCM2835_BOARD_REV_B_I2C1_4, "Model B", NULL),
> > 	RPI_MODEL(BCM2835_BOARD_REV_B_I2C1_5, "Model B", NULL),
> > 	RPI_MODEL(BCM2835_BOARD_REV_B_I2C1_6, "Model B", NULL),
> > 	RPI_MODEL(BCM2835_BOARD_REV_A_7, "Model A", NULL),
> > 	RPI_MODEL(BCM2835_BOARD_REV_A_8, "Model A", NULL),
> > 	RPI_MODEL(BCM2835_BOARD_REV_A_9, "Model A", NULL),
> > 	RPI_MODEL(BCM2835_BOARD_REV_B_REV2_d, "Model B rev2", NULL),
> > 	RPI_MODEL(BCM2835_BOARD_REV_B_REV2_e, "Model B rev2", NULL),
> > 	RPI_MODEL(BCM2835_BOARD_REV_B_REV2_f, "Model B rev2", NULL),
> > 	RPI_MODEL(BCM2835_BOARD_REV_B_PLUS, "Model B+", NULL),
> > 	RPI_MODEL(BCM2835_BOARD_REV_CM, "Compute Module", NULL),
> > 	RPI_MODEL(BCM2835_BOARD_REV_A_PLUS, "Model A+", NULL),
> > };
> > 
> > All inits are NULLs!
> > 
> > Have we any chance to run rpi_add_led()?
> 
> Hm, no, this is never called. Maybe rpi_model_init() should look like
> this instead?
> 
> static void rpi_model_init(void)
> {
> 	if (!models[rpi_board_rev].init)
> 		models[rpi_board_rev].init();


Do you really want to dereference NULL pointer?


 
-- 
Best regards,
  Antony Pavlov