From: Thierry Reding <thierry.reding@avionic-design.de>
Date: Thu, 28 Mar 2013 20:35:04 +0000 (+0100)
Subject: ARM: tegra: powergate: Don't error out if new state == old state
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=eebd1fda2342014a50ed3fd132e5dc6e8b5251e8;p=linux-beck.git

ARM: tegra: powergate: Don't error out if new state == old state

Don't treat it as an error if a partition is already in the same power
state when a user wants to power it on or off. This allows code to
proceed if no state change is required.

Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
---

diff --git a/arch/arm/mach-tegra/powergate.c b/arch/arm/mach-tegra/powergate.c
index c472bed3245e..af9067e2867c 100644
--- a/arch/arm/mach-tegra/powergate.c
+++ b/arch/arm/mach-tegra/powergate.c
@@ -76,7 +76,7 @@ static int tegra_powergate_set(int id, bool new_state)
 
 	if (status == new_state) {
 		spin_unlock_irqrestore(&tegra_powergate_lock, flags);
-		return -EINVAL;
+		return 0;
 	}
 
 	pmc_write(PWRGATE_TOGGLE_START | id, PWRGATE_TOGGLE);