| Message ID | 20230524083153.2046084-2-s.hauer@pengutronix.de |
|---|---|
| State | Superseded |
| Headers | show |
| Series | Add perf support to the rockchip-dfi driver | expand |
Hi, On Wed, May 24, 2023 at 10:31:29AM +0200, Sascha Hauer wrote: > As a matter of fact the regmap_pmu already is mandatory because > it is used unconditionally in the driver. Bail out gracefully in > probe() rather than crashing later. > > Fixes: b9d1262bca0af ("PM / devfreq: event: support rockchip dfi controller") > Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> > --- Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.com> -- Sebastian > > Notes: > Changes since v4: > - move to beginning of the series to make it easier to backport to stable > - Add a Fixes: tag > - add missing of_node_put() > > drivers/devfreq/event/rockchip-dfi.c | 15 ++++++++------- > 1 file changed, 8 insertions(+), 7 deletions(-) > > diff --git a/drivers/devfreq/event/rockchip-dfi.c b/drivers/devfreq/event/rockchip-dfi.c > index 39ac069cabc75..74893c06aa087 100644 > --- a/drivers/devfreq/event/rockchip-dfi.c > +++ b/drivers/devfreq/event/rockchip-dfi.c > @@ -193,14 +193,15 @@ static int rockchip_dfi_probe(struct platform_device *pdev) > return dev_err_probe(dev, PTR_ERR(data->clk), > "Cannot get the clk pclk_ddr_mon\n"); > > - /* try to find the optional reference to the pmu syscon */ > node = of_parse_phandle(np, "rockchip,pmu", 0); > - if (node) { > - data->regmap_pmu = syscon_node_to_regmap(node); > - of_node_put(node); > - if (IS_ERR(data->regmap_pmu)) > - return PTR_ERR(data->regmap_pmu); > - } > + if (!node) > + return dev_err_probe(&pdev->dev, -ENODEV, "Can't find pmu_grf registers\n"); > + > + data->regmap_pmu = syscon_node_to_regmap(node); > + of_node_put(node); > + if (IS_ERR(data->regmap_pmu)) > + return PTR_ERR(data->regmap_pmu); > + > data->dev = dev; > > desc = devm_kzalloc(dev, sizeof(*desc), GFP_KERNEL); > -- > 2.39.2 >
diff --git a/drivers/devfreq/event/rockchip-dfi.c b/drivers/devfreq/event/rockchip-dfi.c index 39ac069cabc75..74893c06aa087 100644 --- a/drivers/devfreq/event/rockchip-dfi.c +++ b/drivers/devfreq/event/rockchip-dfi.c @@ -193,14 +193,15 @@ static int rockchip_dfi_probe(struct platform_device *pdev) return dev_err_probe(dev, PTR_ERR(data->clk), "Cannot get the clk pclk_ddr_mon\n"); - /* try to find the optional reference to the pmu syscon */ node = of_parse_phandle(np, "rockchip,pmu", 0); - if (node) { - data->regmap_pmu = syscon_node_to_regmap(node); - of_node_put(node); - if (IS_ERR(data->regmap_pmu)) - return PTR_ERR(data->regmap_pmu); - } + if (!node) + return dev_err_probe(&pdev->dev, -ENODEV, "Can't find pmu_grf registers\n"); + + data->regmap_pmu = syscon_node_to_regmap(node); + of_node_put(node); + if (IS_ERR(data->regmap_pmu)) + return PTR_ERR(data->regmap_pmu); + data->dev = dev; desc = devm_kzalloc(dev, sizeof(*desc), GFP_KERNEL);
As a matter of fact the regmap_pmu already is mandatory because it is used unconditionally in the driver. Bail out gracefully in probe() rather than crashing later. Fixes: b9d1262bca0af ("PM / devfreq: event: support rockchip dfi controller") Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> --- Notes: Changes since v4: - move to beginning of the series to make it easier to backport to stable - Add a Fixes: tag - add missing of_node_put() drivers/devfreq/event/rockchip-dfi.c | 15 ++++++++------- 1 file changed, 8 insertions(+), 7 deletions(-)