Hi Hans, Andy On 11/10/2021 20:29, Andy Shevchenko wrote: > > > On Monday, October 11, 2021, Hans de Goede <hdegoede@xxxxxxxxxx > <mailto:hdegoede@xxxxxxxxxx>> wrote: > > Hi, > > On 10/9/21 12:46 AM, Daniel Scally wrote: > > The int3472-discrete driver can enter an error path after > initialising > > int3472->clock.ena_gpio, but before it has registered the clock. > This will > > cause a NULL pointer dereference, because clkdev_drop() is not > null aware. > > Instead of guarding the call to skl_int3472_unregister_clock() > by checking > > for .ena_gpio, check specifically for the presence of the > clk_lookup, which > > will guarantee clkdev_create() has already been called. > > > > Bug: https://bugzilla.kernel.org/show_bug.cgi?id=214453 > <https://bugzilla.kernel.org/show_bug.cgi?id=214453> > > > > Is it possible to fix this to be BugLink? I also forgot to CC stable: my bad. I think there's a bot that picks up things with a Fixes: tag if you do that right? > > > > > Fixes: 7540599a5ef1 ("platform/x86: intel_skl_int3472: Provide > skl_int3472_unregister_clock()") > > Signed-off-by: Daniel Scally <djrscally@xxxxxxxxx > <mailto:djrscally@xxxxxxxxx>> > > Thank you for your patch, I've applied this patch to my review-hans > branch: > https://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git/log/?h=review-hans > <https://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git/log/?h=review-hans> > > Note it will show up in my review-hans branch once I've pushed my > local branch there, which might take a while. > > Once I've run some tests on this branch the patches there will be > added to the platform-drivers-x86/for-next branch and eventually > will be included in the pdx86 pull-request to Linus for the next > merge-window. > > I will also include this in my upcoming pdx86-fixes pull-req for > 5.15 . > > Regards, > > Hans > > > > --- > > drivers/platform/x86/intel/int3472/intel_skl_int3472_discrete.c > | 2 +- > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > diff --git > a/drivers/platform/x86/intel/int3472/intel_skl_int3472_discrete.c > b/drivers/platform/x86/intel/int3472/intel_skl_int3472_discrete.c > > index 9fe0a2527e1c..e59d79c7e82f 100644 > > --- > a/drivers/platform/x86/intel/int3472/intel_skl_int3472_discrete.c > > +++ > b/drivers/platform/x86/intel/int3472/intel_skl_int3472_discrete.c > > @@ -401,7 +401,7 @@ int skl_int3472_discrete_remove(struct > platform_device *pdev) > > > > gpiod_remove_lookup_table(&int3472->gpios); > > > > - if (int3472->clock.ena_gpio) > > + if (int3472->clock.cl <http://clock.cl>) > > skl_int3472_unregister_clock(int3472); > > > > gpiod_put(int3472->clock.ena_gpio); > > > > > > -- > With Best Regards, > Andy Shevchenko > >
