2021-07-22 03:43:42

by Zhen Lei

Subject: [PATCH v2 2/2] pinctrl: single: Move test PCS_HAS_PINCONF in pcs_parse_bits_in_pinctrl_entry() to the beginning

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

Signed-off-by: Zhen Lei <[email protected]>
---
drivers/pinctrl/pinctrl-single.c | 22 ++++++++--------------
1 file changed, 8 insertions(+), 14 deletions(-)

diff --git a/drivers/pinctrl/pinctrl-single.c b/drivers/pinctrl/pinctrl-single.c
index 4fcae8458359..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,
@@ -1212,30 +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");
- res = -ENOTSUPP;
- 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:
--
2.25.1

2021-07-27 09:57:40

by Tony Lindgren

Subject: Re: [PATCH v2 2/2] pinctrl: single: Move test PCS_HAS_PINCONF in pcs_parse_bits_in_pinctrl_entry() to the beginning

* Zhen Lei <[email protected]> [210722 03:40]:
> The value of pcs->flags is not overwritten in function
> pcs_parse_bits_in_pinctrl_entry() and its subfunctions, so moving this
> check to the beginning of the function eliminates unnecessary rollback
> operations.

Looks OK to me:

Reviewed-by: Tony Lindgren <[email protected]>