From 2ec7debd44b49927a6e2861521994cc075a389ed Mon Sep 17 00:00:00 2001 From: Javier Martinez Canillas Date: Sat, 9 Jun 2018 08:22:45 -0400 Subject: [PATCH] media: omap3isp: zero-initialize the isp cam_xclk{a,b} initial data Git-commit: 2ec7debd44b49927a6e2861521994cc075a389ed Patch-mainline: v4.19-rc1 References: bsc#1051510 The struct clk_init_data init variable is declared in the isp_xclk_init() function so is an automatic variable allocated in the stack. But it's not explicitly zero-initialized, so some init fields are left uninitialized. This causes the data structure to have undefined values that may confuse the common clock framework when the clock is registered. For example, the uninitialized .flags field could have the CLK_IS_CRITICAL bit set, causing the framework to wrongly prepare the clk on registration. This leads to the isp_xclk_prepare() callback being called, which in turn calls to the omap3isp_get() function that increments the isp dev refcount. Since this omap3isp_get() call is unexpected, this leads to an unbalanced omap3isp_get() call that prevents the requested IRQ to be later enabled, due the refcount not being 0 when the correct omap3isp_get() call happens. Fixes: 9b28ee3c9122 ("[media] omap3isp: Use the common clock framework") Signed-off-by: Javier Martinez Canillas Reviewed-by: Sebastian Reichel Signed-off-by: Sakari Ailus Signed-off-by: Mauro Carvalho Chehab Acked-by: Takashi Iwai --- drivers/media/platform/omap3isp/isp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/media/platform/omap3isp/isp.c b/drivers/media/platform/omap3isp/isp.c index a658c12eead1..03354d513311 100644 --- a/drivers/media/platform/omap3isp/isp.c +++ b/drivers/media/platform/omap3isp/isp.c @@ -300,7 +300,7 @@ static struct clk *isp_xclk_src_get(struct of_phandle_args *clkspec, void *data) static int isp_xclk_init(struct isp_device *isp) { struct device_node *np = isp->dev->of_node; - struct clk_init_data init; + struct clk_init_data init = { 0 }; unsigned int i; for (i = 0; i < ARRAY_SIZE(isp->xclks); ++i) -- 2.18.0