pinctrl: simplify check for pin request conflicts
This is a non-functional change, which deletes code duplication in two
of four if-if branches by reordering the checks. Functional identity
of the code change can be shown by running through the whole truth table
of boolean arguments.
Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/drivers/pinctrl/pinmux.c b/drivers/pinctrl/pinmux.c
index ece7028..9373146 100644
--- a/drivers/pinctrl/pinmux.c
+++ b/drivers/pinctrl/pinmux.c
@@ -99,37 +99,24 @@ static int pin_request(struct pinctrl_dev *pctldev,
dev_dbg(pctldev->dev, "request pin %d (%s) for %s\n",
pin, desc->name, owner);
- if (gpio_range) {
- /* There's no need to support multiple GPIO requests */
- if (desc->gpio_owner) {
- dev_err(pctldev->dev,
- "pin %s already requested by %s; cannot claim for %s\n",
- desc->name, desc->gpio_owner, owner);
- goto out;
- }
- if (ops->strict && desc->mux_usecount &&
- strcmp(desc->mux_owner, owner)) {
- dev_err(pctldev->dev,
- "pin %s already requested by %s; cannot claim for %s\n",
- desc->name, desc->mux_owner, owner);
- goto out;
- }
+ if ((!gpio_range || ops->strict) &&
+ desc->mux_usecount && strcmp(desc->mux_owner, owner)) {
+ dev_err(pctldev->dev,
+ "pin %s already requested by %s; cannot claim for %s\n",
+ desc->name, desc->mux_owner, owner);
+ goto out;
+ }
+ if ((gpio_range || ops->strict) && desc->gpio_owner) {
+ dev_err(pctldev->dev,
+ "pin %s already requested by %s; cannot claim for %s\n",
+ desc->name, desc->gpio_owner, owner);
+ goto out;
+ }
+
+ if (gpio_range) {
desc->gpio_owner = owner;
} else {
- if (desc->mux_usecount && strcmp(desc->mux_owner, owner)) {
- dev_err(pctldev->dev,
- "pin %s already requested by %s; cannot claim for %s\n",
- desc->name, desc->mux_owner, owner);
- goto out;
- }
- if (ops->strict && desc->gpio_owner) {
- dev_err(pctldev->dev,
- "pin %s already requested by %s; cannot claim for %s\n",
- desc->name, desc->gpio_owner, owner);
- goto out;
- }
-
desc->mux_usecount++;
if (desc->mux_usecount > 1)
return 0;
