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pinctrl: pinmux: Release all taken pins in pinmux_enable_setting error paths

PATCH In review Axel Lin 2 participants 2 messages Nov 10, 2012 – Nov 11, 2012 Pin control

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Axel Lin

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#0 lore raw

PATCH 1/1 pinctrl: pinmux: Release all taken pins in pinmux_enable_setting error paths

Currently pinmux_enable_setting does not release all taken pins if ops->enable() returns error. This patch ensures all taken pins are released in any error paths.

---
 drivers/pinctrl/pinmux.c |   28 +++++++++++++++++++++-------
 1 file changed, 21 insertions(+), 7 deletions(-)
drivers/pinctrl/pinmux.c +21 -7
index 0ef01ee..1a00658 100644
@@ -409,11 +409,7 @@ int pinmux_enable_setting(struct pinctrl_setting const *setting)
 			dev_err(pctldev->dev,
 				"could not request pin %d on device %s\n",
 				pins[i], pinctrl_dev_get_name(pctldev));
-			/* On error release all taken pins */
-			i--; /* this pin just failed */
-			for (; i >= 0; i--)
-				pin_free(pctldev, pins[i], NULL);
-			return -ENODEV;
+			goto err_pin_request;
 		}
 	}
 
@@ -429,8 +425,26 @@ int pinmux_enable_setting(struct pinctrl_setting const *setting)
 		desc->mux_setting = &(setting->data.mux);
 	}
 
-	return ops->enable(pctldev, setting->data.mux.func,
-			   setting->data.mux.group);
+	ret = ops->enable(pctldev, setting->data.mux.func,
+			  setting->data.mux.group);
+
+	if (ret)
+		goto err_enable;
+
+	return 0;
+
+err_enable:
+	for (i = 0; i < num_pins; i++) {
+		desc = pin_desc_get(pctldev, pins[i]);
+		if (desc)
+			desc->mux_setting = NULL;
+	}
+err_pin_request:
+	/* On error release all taken pins */
+	while (--i >= 0)
+		pin_free(pctldev, pins[i], NULL);
+
+	return ret;
 }
 
 void pinmux_disable_setting(struct pinctrl_setting const *setting)
Signature · 1 line
1.7.9.5
#1 lore raw
Quoted 5 lines · Axel Lin

Currently pinmux_enable_setting does not release all taken pins if ops->enable() returns error. This patch ensures all taken pins are released in any error paths.

Thanks a *lot* that's a pretty important fix Axel! :-)

Patch applied.

Yours,
Linus Walleij