On Tue, Nov 15, 2022 at 12:18:00PM +0100, Marijn Suijten wrote:
> On 2022-11-14 16:15:25, Brian Masney wrote:
> > On Fri, Nov 11, 2022 at 12:37:32PM +0100, Thierry Reding wrote:
> > > From: Thierry Reding <treding@xxxxxxxxxx>
> > >
> > > The OF node store in chip->fwnode is used to explicitly override the FW
> > > node for a GPIO chip. For chips that use the default FW node (i.e. that
> > > of their parent device), this will be NULL and cause the chip not to be
> > > fully registered.
> > >
> > > Instead, use the GPIO device's FW node, which is set to either the node
> > > of the parent device or the explicit override in chip->fwnode.
> > >
> > > Fixes: 8afe82550240 ("gpiolib: of: Prepare of_gpiochip_add() / of_gpiochip_remove() for fwnode")
> > > Tested-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
> > > Signed-off-by: Thierry Reding <treding@xxxxxxxxxx>
> >
> > Reviewed-by: Brian Masney <bmasney@xxxxxxxxxx>
> > Tested-by: Brian Masney <bmasney@xxxxxxxxxx>
> >
> > I separately sent a similar type of patch to fix the same issue today:
> > https://lore.kernel.org/linux-arm-msm/20221114202943.2389489-1-bmasney@xxxxxxxxxx/T/#u
>
> For completeness, your linked patch fixes a synchronous external abort
> on multiple Qualcomm platforms pointed out in [1]. This patch however
> does not, are you sure they fix the exact same issue?
>
> [1]: https://lore.kernel.org/linux-arm-msm/20221115110800.35gl3j43lmbxm3jb@xxxxxxxxxxxxxx/
Can you check if the below fixes the MSM issue that you're seeing
(applied on top of my earlier patch, though with Brian's reverted
temporarily)?
Thanks,
Thierry
--- >8 ---
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 11fb7ec883e9..d692ad5c5a27 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -447,10 +447,11 @@ static unsigned long *gpiochip_allocate_mask(struct gpio_chip *gc)
static unsigned int gpiochip_count_reserved_ranges(struct gpio_chip *gc)
{
+ struct fwnode_handle *fwnode = dev_fwnode(&gc->gpiodev->dev);
int size;
/* Format is "start, count, ..." */
- size = fwnode_property_count_u32(gc->fwnode, "gpio-reserved-ranges");
+ size = fwnode_property_count_u32(fwnode, "gpio-reserved-ranges");
if (size > 0 && size % 2 == 0)
return size;
@@ -471,6 +472,7 @@ static int gpiochip_alloc_valid_mask(struct gpio_chip *gc)
static int gpiochip_apply_reserved_ranges(struct gpio_chip *gc)
{
+ struct fwnode_handle *fwnode = dev_fwnode(&gc->gpiodev->dev);
unsigned int size;
u32 *ranges;
int ret;
@@ -483,7 +485,7 @@ static int gpiochip_apply_reserved_ranges(struct gpio_chip *gc)
if (!ranges)
return -ENOMEM;
- ret = fwnode_property_read_u32_array(gc->fwnode, "gpio-reserved-ranges", ranges, size);
+ ret = fwnode_property_read_u32_array(fwnode, "gpio-reserved-ranges", ranges, size);
if (ret) {
kfree(ranges);
return ret;
--- >8 ---
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