| Message ID | 20240814-b4-cleanup-h-of-node-put-thermal-v1-2-7a1381e1627e@linaro.org (mailing list archive) |
|---|---|
| State | Superseded, archived |
| Headers | show |
| Series | thermal: scope/cleanup.h improvements | expand |
On Wed, Aug 14, 2024 at 10:17:48PM +0200, Krzysztof Kozlowski wrote: > Obtain the device node reference with scoped/cleanup.h to reduce error > handling and make the code a bit simpler. > > Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> > --- > drivers/thermal/thermal_of.c | 14 ++++---------- > 1 file changed, 4 insertions(+), 10 deletions(-) > > diff --git a/drivers/thermal/thermal_of.c b/drivers/thermal/thermal_of.c > index a2278d4ad886..c8ded4462bb8 100644 > --- a/drivers/thermal/thermal_of.c > +++ b/drivers/thermal/thermal_of.c > @@ -117,10 +117,9 @@ 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); > @@ -129,15 +128,12 @@ 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; Also drop the "of_node_put(trips);" in the successful path? Once fixed, Reviewed-by: Chen-Yu Tsai <wenst@chromium.org> And I plan to send a patch on top of this making "tt" auto released, thereby eliminating the error path. > > @@ -155,8 +151,6 @@ static struct thermal_trip *thermal_of_trips_init(struct device_node *np, int *n > out_kfree: > kfree(tt); > *ntrips = 0; > -out_of_node_put: > - of_node_put(trips); > > return ERR_PTR(ret); > } > > -- > 2.43.0 >
On 15/08/2024 09:15, Chen-Yu Tsai 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; > > Also drop the "of_node_put(trips);" in the successful path? > Right. Best regards, Krzysztof
On 2024-08-15 09:15, Chen-Yu Tsai wrote: > On Wed, Aug 14, 2024 at 10:17:48PM +0200, Krzysztof Kozlowski wrote: >> Obtain the device node reference with scoped/cleanup.h to reduce error >> handling and make the code a bit simpler. >> >> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> >> --- >> drivers/thermal/thermal_of.c | 14 ++++---------- >> 1 file changed, 4 insertions(+), 10 deletions(-) >> >> diff --git a/drivers/thermal/thermal_of.c >> b/drivers/thermal/thermal_of.c >> index a2278d4ad886..c8ded4462bb8 100644 >> --- a/drivers/thermal/thermal_of.c >> +++ b/drivers/thermal/thermal_of.c >> @@ -117,10 +117,9 @@ 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); >> @@ -129,15 +128,12 @@ 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; > > Also drop the "of_node_put(trips);" in the successful path? > > Once fixed, > > Reviewed-by: Chen-Yu Tsai <wenst@chromium.org> > > And I plan to send a patch on top of this making "tt" auto released, > thereby eliminating the error path. Ah, with that additional patch in place, I totally agree with moving "*ntrips = 0" to the top. >> @@ -155,8 +151,6 @@ static struct thermal_trip >> *thermal_of_trips_init(struct device_node *np, int *n >> out_kfree: >> kfree(tt); >> *ntrips = 0; >> -out_of_node_put: >> - of_node_put(trips); >> >> return ERR_PTR(ret); >> } >> >> -- >> 2.43.0 >>
diff --git a/drivers/thermal/thermal_of.c b/drivers/thermal/thermal_of.c index a2278d4ad886..c8ded4462bb8 100644 --- a/drivers/thermal/thermal_of.c +++ b/drivers/thermal/thermal_of.c @@ -117,10 +117,9 @@ 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); @@ -129,15 +128,12 @@ 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; @@ -155,8 +151,6 @@ static struct thermal_trip *thermal_of_trips_init(struct device_node *np, int *n out_kfree: kfree(tt); *ntrips = 0; -out_of_node_put: - of_node_put(trips); return ERR_PTR(ret); }
Obtain the device node reference with scoped/cleanup.h to reduce error handling and make the code a bit simpler. Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> --- drivers/thermal/thermal_of.c | 14 ++++---------- 1 file changed, 4 insertions(+), 10 deletions(-)