From: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Date: Fri, 11 Sep 2015 14:34:07 +0000 (+0200)
Subject: clk: at91: system: don't try to free_irq when there is no IRQ
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=a97cea2a5cfb1e66716226ea258251317acd8ffe;p=openwrt%2Fstaging%2Fblogic.git

clk: at91: system: don't try to free_irq when there is no IRQ

In the error path of at91_clk_register_system(), sys->irq is freed
unconditionally but it may not exist or be request at all.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
---

diff --git a/drivers/clk/at91/clk-system.c b/drivers/clk/at91/clk-system.c
index 58008b3e8bc1..3f5314344286 100644
--- a/drivers/clk/at91/clk-system.c
+++ b/drivers/clk/at91/clk-system.c
@@ -138,7 +138,8 @@ at91_clk_register_system(struct at91_pmc *pmc, const char *name,
 
 	clk = clk_register(NULL, &sys->hw);
 	if (IS_ERR(clk)) {
-		free_irq(sys->irq, sys);
+		if (irq)
+			free_irq(sys->irq, sys);
 		kfree(sys);
 	}