regulator: Fix for 3.5

A smallish fix for a lock dependency issue which affects a bunch of
 Qualcomm boards that do unusually complicated things with their
 regulators, the API is unlikely to be called by any other system.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.12 (GNU/Linux)
 
 iQIcBAABAgAGBQJP9yyGAAoJEBus8iNuMP3dI24P/RXFIHH1dYck49uQ17moYDY+
 vQBM7amuu23Q9MJxU5rGWaqwxXR8qT3iT76BlL9bt8u91GM4tDrccLRW09+GJXNZ
 1tpFK96iOaH9ju/+FMc0nR9P385YqxRh91ZWDfyAqectBU8nFAtcl+7BakuR/9j/
 2XbftG3T555EylCfwAaw1ikOALxE47ALgKa/Hglu8RDZTQSaWWZb2o20PTXfrkUk
 Mt1Pzs9PMfmgE7VUC6Q04vEydX47L8/iwywanzcbMTKw00d3o5WXTwNqDzcPWGZv
 S9pSGQaZ10JVMO7eu4337fsfIuhUEU0Ilbaow1eLi1RymgDFIamr0SUKcpC1sPDF
 O95l1GZmEwiyDJITL4K1Ssf5TZCKmR9eMh9e1iPmOrtpK4tGHxwqO5+OHmfncISp
 g4x4G7o+aK5M9c3+9r3G7S1ZrV4LAcFLVxN9LHo0PLIG/lT7tl8e6dAlWZjKSRIC
 w18lJ7mdOCXgJqOt4UzIRbWpI0pZaXt0tk1mfU+/vfzhl9C5AVMVNGqgaiafHWGG
 Kh01vjjSIGhfE3k83eOGlkYpTGvFsZBMVUMHif8hRfrBjiHj7RnvAfXqV0ULpa50
 v0huqrPwB+384c2V6K1f6IbpyLXZQ10h4HwctxprKbO+cZZ5oYlxLlu8tkJFvNMD
 QxLC8aDIumuprilMgryd
 =x509
 -----END PGP SIGNATURE-----

Merge tag 'regulator-3.5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator

Pull regulator fix from Mark Brown:
 "A smallish fix for a lock dependency issue which affects a bunch of
  Qualcomm boards that do unusually complicated things with their
  regulators, the API is unlikely to be called by any other system."

* tag 'regulator-3.5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
  regulator: Fix recursive mutex lockdep warning

drivers/regulator/core.c

@@ -2519,9 +2519,12 @@ int regulator_set_optimum_mode(struct regulator *regulator, int uA_load)
 {
 	struct regulator_dev *rdev = regulator->rdev;
 	struct regulator *consumer;
-	int ret, output_uV, input_uV, total_uA_load = 0;
+	int ret, output_uV, input_uV = 0, total_uA_load = 0;
 	unsigned int mode;
 
+	if (rdev->supply)
+		input_uV = regulator_get_voltage(rdev->supply);
+
 	mutex_lock(&rdev->mutex);
 
 	/*
@@ -2554,10 +2557,7 @@ int regulator_set_optimum_mode(struct regulator *regulator, int uA_load)
 		goto out;
 	}
 
-	/* get input voltage */
-	input_uV = 0;
-	if (rdev->supply)
-		input_uV = regulator_get_voltage(rdev->supply);
+	/* No supply? Use constraint voltage */
 	if (input_uV <= 0)
 		input_uV = rdev->constraints->input_uV;
 	if (input_uV <= 0) {