diff mbox series

pinctrl: single: Fix error return code in pcs_parse_bits_in_pinctrl_entry()

Message ID 20210715064206.3193-1-thunder.leizhen@huawei.com
State New
Headers show
Series pinctrl: single: Fix error return code in pcs_parse_bits_in_pinctrl_entry() | expand

Commit Message

Leizhen (ThunderTown) July 15, 2021, 6:42 a.m. UTC
Fix to return -ENOTSUPP instead of 0 when PCS_HAS_PINCONF is true, which
is the same as that returned in pcs_parse_pinconf().

In addition, I found the value of pcs->flags is not overwritten in
pcs_parse_bits_in_pinctrl_entry() and its subfunctions, so moving this
check to the beginning of the function eliminates unnecessary rollback
operations.

Fixes: 4e7e8017a80e ("pinctrl: pinctrl-single: enhance to configure multiple pins of different modules")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>

---
 drivers/pinctrl/pinctrl-single.c | 21 ++++++++-------------
 1 file changed, 8 insertions(+), 13 deletions(-)

-- 
2.25.1

Comments

Leizhen (ThunderTown) July 16, 2021, 1:04 a.m. UTC | #1
On 2021/7/15 19:49, weiyongjun (A) wrote:
>> Fix to return -ENOTSUPP instead of 0 when PCS_HAS_PINCONF is true, which

>> is the same as that returned in pcs_parse_pinconf().

>>

>> In addition, I found the value of pcs->flags is not overwritten in

>> pcs_parse_bits_in_pinctrl_entry() and its subfunctions, so moving this

>> check to the beginning of the function eliminates unnecessary rollback

>> operations.

>>

>> Fixes: 4e7e8017a80e ("pinctrl: pinctrl-single: enhance to configure multiple pins of different modules")

>> Reported-by: Hulk Robot <hulkci@huawei.com>

>> Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>

>> ---

>>   drivers/pinctrl/pinctrl-single.c | 21 ++++++++-------------

>>   1 file changed, 8 insertions(+), 13 deletions(-)

>>

>>

>>       npins_in_row = pcs->width / pcs->bits_per_pin;

>>         vals = devm_kzalloc(pcs->dev,

>> @@ -1212,29 +1217,19 @@ static int pcs_parse_bits_in_pinctrl_entry(struct pcs_device *pcs,

>>           goto free_pins;

>>       }

>>   -    gsel = pinctrl_generic_add_group(pcs->pctl, np->name, pins, found, pcs);

>> -    if (gsel < 0) {

>> -        res = gsel;

>> +    res = pinctrl_generic_add_group(pcs->pctl, np->name, pins, found, pcs);

>> +    if (res < 0)

>>           goto free_function;

>> -    }

> 

> 

> This change cause 'gsel' not set.

> 

> Do not mix this cleanup with bugfix.


gsel已经不需要了,已经被我删掉了

> 

> 

> 

> .

>
Leizhen (ThunderTown) July 16, 2021, 1:17 a.m. UTC | #2
On 2021/7/15 19:49, weiyongjun (A) wrote:
>> Fix to return -ENOTSUPP instead of 0 when PCS_HAS_PINCONF is true, which

>> is the same as that returned in pcs_parse_pinconf().

>>

>> In addition, I found the value of pcs->flags is not overwritten in

>> pcs_parse_bits_in_pinctrl_entry() and its subfunctions, so moving this

>> check to the beginning of the function eliminates unnecessary rollback

>> operations.

>>

>> Fixes: 4e7e8017a80e ("pinctrl: pinctrl-single: enhance to configure multiple pins of different modules")

>> Reported-by: Hulk Robot <hulkci@huawei.com>

>> Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>

>> ---

>>   drivers/pinctrl/pinctrl-single.c | 21 ++++++++-------------

>>   1 file changed, 8 insertions(+), 13 deletions(-)

>>

>>

>>       npins_in_row = pcs->width / pcs->bits_per_pin;

>>         vals = devm_kzalloc(pcs->dev,

>> @@ -1212,29 +1217,19 @@ static int pcs_parse_bits_in_pinctrl_entry(struct pcs_device *pcs,

>>           goto free_pins;

>>       }

>>   -    gsel = pinctrl_generic_add_group(pcs->pctl, np->name, pins, found, pcs);

>> -    if (gsel < 0) {

>> -        res = gsel;

>> +    res = pinctrl_generic_add_group(pcs->pctl, np->name, pins, found, pcs);

>> +    if (res < 0)

>>           goto free_function;

>> -    }

> 

> 

> This change cause 'gsel' not set.


The local variable 'gsel' is no longer needed. I have deleted it.

> 

> Do not mix this cleanup with bugfix.


Yes, it might be clearer.

> 

> 

> 

> .

>
diff mbox series

Patch

diff --git a/drivers/pinctrl/pinctrl-single.c b/drivers/pinctrl/pinctrl-single.c
index e3aa64798f7d..d8b4dc40f3c6 100644
--- a/drivers/pinctrl/pinctrl-single.c
+++ b/drivers/pinctrl/pinctrl-single.c
@@ -1115,7 +1115,7 @@  static int pcs_parse_bits_in_pinctrl_entry(struct pcs_device *pcs,
 {
 	const char *name = "pinctrl-single,bits";
 	struct pcs_func_vals *vals;
-	int rows, *pins, found = 0, res = -ENOMEM, i, fsel, gsel;
+	int rows, *pins, found = 0, res = -ENOMEM, i, fsel;
 	int npins_in_row;
 	struct pcs_function *function = NULL;
 
@@ -1125,6 +1125,11 @@  static int pcs_parse_bits_in_pinctrl_entry(struct pcs_device *pcs,
 		return -EINVAL;
 	}
 
+	if (PCS_HAS_PINCONF) {
+		dev_err(pcs->dev, "pinconf not supported\n");
+		return -ENOTSUPP;
+	}
+
 	npins_in_row = pcs->width / pcs->bits_per_pin;
 
 	vals = devm_kzalloc(pcs->dev,
@@ -1212,29 +1217,19 @@  static int pcs_parse_bits_in_pinctrl_entry(struct pcs_device *pcs,
 		goto free_pins;
 	}
 
-	gsel = pinctrl_generic_add_group(pcs->pctl, np->name, pins, found, pcs);
-	if (gsel < 0) {
-		res = gsel;
+	res = pinctrl_generic_add_group(pcs->pctl, np->name, pins, found, pcs);
+	if (res < 0)
 		goto free_function;
-	}
 
 	(*map)->type = PIN_MAP_TYPE_MUX_GROUP;
 	(*map)->data.mux.group = np->name;
 	(*map)->data.mux.function = np->name;
 
-	if (PCS_HAS_PINCONF) {
-		dev_err(pcs->dev, "pinconf not supported\n");
-		goto free_pingroups;
-	}
-
 	*num_maps = 1;
 	mutex_unlock(&pcs->mutex);
 
 	return 0;
 
-free_pingroups:
-	pinctrl_generic_remove_group(pcs->pctl, gsel);
-	*num_maps = 1;
 free_function:
 	pinmux_generic_remove_function(pcs->pctl, fsel);
 free_pins: