On Thu, Jan 16, 2020 at 04:39:37PM +0000, Sasha Levin wrote:
> From: Steven Price <steven.pr...@arm.com>
>
> [ Upstream commit 52282163dfa651849e905886845bcf6850dd83c2 ]
This commit is effectively already in 5.4. Confusingly there were two
versions of this upstream:
52282163dfa6 ("drm/panfrost: Add missing check for pfdev->regulator")
c90f30812a79 ("drm/panfrost: Add missing check for pfdev->regulator")
It got merged both through a -fixes branch and through the normal merge
window. The two copies caused a bad merge in mainline and this was
effectively reverted in commit 603e398a3db2 ("drm/panfrost: Remove NULL
check for regulator").
c90f30812a79 is included in v5.4 so should already be in any v5.4.y
release.
Steve
>
> When modifying panfrost_devfreq_target() to support a device without a
> regulator defined I missed the check on the error path. Let's add it.
>
> Reported-by: Dan Carpenter <dan.carpen...@oracle.com>
> Fixes: e21dd290881b ("drm/panfrost: Enable devfreq to work without regulator")
> Signed-off-by: Steven Price <steven.pr...@arm.com>
> Signed-off-by: Rob Herring <r...@kernel.org>
> Link:
> https://patchwork.freedesktop.org/patch/msgid/20190822093218.26014-1-steven.pr...@arm.com
> Signed-off-by: Sasha Levin <sas...@kernel.org>
> ---
> drivers/gpu/drm/panfrost/panfrost_devfreq.c | 6 ++++--
> 1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/panfrost/panfrost_devfreq.c
> b/drivers/gpu/drm/panfrost/panfrost_devfreq.c
> index 12ff77dacc95..c1eb8cfe6aeb 100644
> --- a/drivers/gpu/drm/panfrost/panfrost_devfreq.c
> +++ b/drivers/gpu/drm/panfrost/panfrost_devfreq.c
> @@ -53,8 +53,10 @@ static int panfrost_devfreq_target(struct device *dev,
> unsigned long *freq,
> if (err) {
> dev_err(dev, "Cannot set frequency %lu (%d)\n", target_rate,
> err);
> - regulator_set_voltage(pfdev->regulator, pfdev->devfreq.cur_volt,
> - pfdev->devfreq.cur_volt);
> + if (pfdev->regulator)
> + regulator_set_voltage(pfdev->regulator,
> + pfdev->devfreq.cur_volt,
> + pfdev->devfreq.cur_volt);
> return err;
> }
>
> --
> 2.20.1
>
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