From: Sylwester Nawrocki <sylvester.nawrocki@xxxxxxxxx>
Make sure there is no unbalanced clk_unprepare call and add missing
clock release in the driver's remove() callback.
Signed-off-by: Sylwester Nawrocki <sylvester.nawrocki@xxxxxxxxx>
Signed-off-by: Sachin Kamat <sachin.kamat@xxxxxxxxxx>
---
drivers/media/platform/exynos-gsc/gsc-core.c | 15 ++++++++-------
1 files changed, 8 insertions(+), 7 deletions(-)
diff --git a/drivers/media/platform/exynos-gsc/gsc-core.c b/drivers/media/platform/exynos-gsc/gsc-core.c
index 45bcfa7..c8b82c0 100644
--- a/drivers/media/platform/exynos-gsc/gsc-core.c
+++ b/drivers/media/platform/exynos-gsc/gsc-core.c
@@ -1002,12 +1002,11 @@ static void *gsc_get_drv_data(struct platform_device *pdev)
static void gsc_clk_put(struct gsc_dev *gsc)
{
- if (IS_ERR_OR_NULL(gsc->clock))
- return;
-
- clk_unprepare(gsc->clock);
- clk_put(gsc->clock);
- gsc->clock = NULL;
+ if (!IS_ERR(gsc->clock)) {
+ clk_unprepare(gsc->clock);
+ clk_put(gsc->clock);
+ gsc->clock = NULL;
+ }
}
static int gsc_clk_get(struct gsc_dev *gsc)
@@ -1028,7 +1027,7 @@ static int gsc_clk_get(struct gsc_dev *gsc)
dev_err(&gsc->pdev->dev, "clock prepare failed for clock: %s\n",
GSC_CLOCK_GATE_NAME);
clk_put(gsc->clock);
- gsc->clock = NULL;
+ gsc->clock = ERR_PTR(-EINVAL);
goto err_clk_prepare;
}
@@ -1106,6 +1105,7 @@ static int gsc_probe(struct platform_device *pdev)
init_waitqueue_head(&gsc->irq_queue);
spin_lock_init(&gsc->slock);
mutex_init(&gsc->lock);
+ gsc->clock = ERR_PTR(-EINVAL);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
gsc->regs = devm_request_and_ioremap(dev, res);
@@ -1169,6 +1169,7 @@ static int __devexit gsc_remove(struct platform_device *pdev)
vb2_dma_contig_cleanup_ctx(gsc->alloc_ctx);
pm_runtime_disable(&pdev->dev);
+ gsc_clk_put(gsc);
dev_dbg(&pdev->dev, "%s driver unloaded\n", pdev->name);
return 0;
--
1.7.4.1
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