mfd: fix undefined twl4030-power resconfig value checks

The code tries to skip values initialized with -1, but since the values are unsigned the comparison is always true. The patch eliminates the following compiler warnings: drivers/mfd/twl4030-power.c: In function 'twl4030_configure_resource': drivers/mfd/twl4030-power.c:338: warning: comparison is always true due to limited range of data type drivers/mfd/twl4030-power.c:358: warning: comparison is always true due to limited range of data type drivers/mfd/twl4030-power.c:363: warning: comparison is always true due to limited range of data type Signed-off-by: Aaro Koskinen <[email protected]> Signed-off-by: Samuel Ortiz <[email protected]>
cbmeeks · Dec 13, 2009 · 56baa66 · 56baa66
1 parent b4ead61
commit 56baa66
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Showing 2 changed files with 4 additions and 3 deletions.
diff --git a/drivers/mfd/twl4030-power.c b/drivers/mfd/twl4030-power.c
@@ -352,7 +352,7 @@ static int __init twl4030_configure_resource(struct twl4030_resconfig *rconfig)
 		return err;
 	}
 
-	if (rconfig->devgroup >= 0) {
+	if (rconfig->devgroup != TWL4030_RESCONFIG_UNDEF) {
 		grp &= ~DEV_GRP_MASK;
 		grp |= rconfig->devgroup << DEV_GRP_SHIFT;
 		err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
@@ -372,12 +372,12 @@ static int __init twl4030_configure_resource(struct twl4030_resconfig *rconfig)
 		return err;
 	}
 
-	if (rconfig->type >= 0) {
+	if (rconfig->type != TWL4030_RESCONFIG_UNDEF) {
 		type &= ~TYPE_MASK;
 		type |= rconfig->type << TYPE_SHIFT;
 	}
 
-	if (rconfig->type2 >= 0) {
+	if (rconfig->type2 != TWL4030_RESCONFIG_UNDEF) {
 		type &= ~TYPE2_MASK;
 		type |= rconfig->type2 << TYPE2_SHIFT;
 	}

diff --git a/include/linux/i2c/twl4030.h b/include/linux/i2c/twl4030.h
@@ -400,6 +400,7 @@ struct twl4030_power_data {
 	struct twl4030_script **scripts;
 	unsigned num;
 	struct twl4030_resconfig *resource_config;
+#define TWL4030_RESCONFIG_UNDEF	((u8)-1)
 };
 
 extern void twl4030_power_init(struct twl4030_power_data *triton2_scripts);