| Message ID | 20241008-b4-cleanup-h-of-node-put-thermal-v3-2-825122398f71@linaro.org (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | thermal: scope/cleanup.h improvements | expand |
On Tue, 08 Oct 2024 11:00:02 +0200 Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> wrote: > Obtain the device node reference with scoped/cleanup.h to reduce error > handling and make the code a bit simpler. > > Reviewed-by: Chen-Yu Tsai <wenst@chromium.org> > Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> A follow up suggestion below. Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> > > --- > > Changes in v2: > 1. Drop left-over of_node_put in regular exit path (Chen-Yu) > --- > drivers/thermal/thermal_of.c | 16 ++++------------ > 1 file changed, 4 insertions(+), 12 deletions(-) > > diff --git a/drivers/thermal/thermal_of.c b/drivers/thermal/thermal_of.c > index f0ffc0e335ba9406f4fd858d6c561f9d23f4b842..d7d6f62caa13d545e5f7fae4c8ac1e737bf4c4b1 100644 > --- a/drivers/thermal/thermal_of.c > +++ b/drivers/thermal/thermal_of.c > @@ -96,10 +96,9 @@ static int thermal_of_populate_trip(struct device_node *np, > static struct thermal_trip *thermal_of_trips_init(struct device_node *np, int *ntrips) > { > struct thermal_trip *tt; > - struct device_node *trips; > int ret, count; > > - trips = of_get_child_by_name(np, "trips"); > + struct device_node *trips __free(device_node) = of_get_child_by_name(np, "trips"); > if (!trips) { > pr_err("Failed to find 'trips' node\n"); > return ERR_PTR(-EINVAL); > @@ -108,15 +107,12 @@ static struct thermal_trip *thermal_of_trips_init(struct device_node *np, int *n > count = of_get_child_count(trips); > if (!count) { > pr_err("No trip point defined\n"); > - ret = -EINVAL; > - goto out_of_node_put; > + return ERR_PTR(-EINVAL); > } > > tt = kzalloc(sizeof(*tt) * count, GFP_KERNEL); > - if (!tt) { > - ret = -ENOMEM; > - goto out_of_node_put; > - } > + if (!tt) > + return ERR_PTR(-ENOMEM); > > *ntrips = count; > > @@ -127,15 +123,11 @@ static struct thermal_trip *thermal_of_trips_init(struct device_node *np, int *n > goto out_kfree; > } > > - of_node_put(trips); > - > return tt; > > out_kfree: > kfree(tt); May be worth a follow up to do __free(kfree) on this + a steal for the return. Then push the ntrips set until after the populate so it doesn't need resetting to 0. > *ntrips = 0; > -out_of_node_put: > - of_node_put(trips); > > return ERR_PTR(ret); > } >
On 08/10/2024 13:32, Jonathan Cameron wrote: >> tt = kzalloc(sizeof(*tt) * count, GFP_KERNEL); >> - if (!tt) { >> - ret = -ENOMEM; >> - goto out_of_node_put; >> - } >> + if (!tt) >> + return ERR_PTR(-ENOMEM); >> >> *ntrips = count; >> >> @@ -127,15 +123,11 @@ static struct thermal_trip *thermal_of_trips_init(struct device_node *np, int *n >> goto out_kfree; >> } >> >> - of_node_put(trips); >> - >> return tt; >> >> out_kfree: >> kfree(tt); > May be worth a follow up to do __free(kfree) on this + a steal for the return. > Then push the ntrips set until after the populate so it doesn't need resetting to 0. That's good idea, I'll send v4 with a revised patch (dropping your RB here). Best regards, Krzysztof
diff --git a/drivers/thermal/thermal_of.c b/drivers/thermal/thermal_of.c index f0ffc0e335ba9406f4fd858d6c561f9d23f4b842..d7d6f62caa13d545e5f7fae4c8ac1e737bf4c4b1 100644 --- a/drivers/thermal/thermal_of.c +++ b/drivers/thermal/thermal_of.c @@ -96,10 +96,9 @@ static int thermal_of_populate_trip(struct device_node *np, static struct thermal_trip *thermal_of_trips_init(struct device_node *np, int *ntrips) { struct thermal_trip *tt; - struct device_node *trips; int ret, count; - trips = of_get_child_by_name(np, "trips"); + struct device_node *trips __free(device_node) = of_get_child_by_name(np, "trips"); if (!trips) { pr_err("Failed to find 'trips' node\n"); return ERR_PTR(-EINVAL); @@ -108,15 +107,12 @@ static struct thermal_trip *thermal_of_trips_init(struct device_node *np, int *n count = of_get_child_count(trips); if (!count) { pr_err("No trip point defined\n"); - ret = -EINVAL; - goto out_of_node_put; + return ERR_PTR(-EINVAL); } tt = kzalloc(sizeof(*tt) * count, GFP_KERNEL); - if (!tt) { - ret = -ENOMEM; - goto out_of_node_put; - } + if (!tt) + return ERR_PTR(-ENOMEM); *ntrips = count; @@ -127,15 +123,11 @@ static struct thermal_trip *thermal_of_trips_init(struct device_node *np, int *n goto out_kfree; } - of_node_put(trips); - return tt; out_kfree: kfree(tt); *ntrips = 0; -out_of_node_put: - of_node_put(trips); return ERR_PTR(ret); }