From: Sylwester Nawrocki Date: Mon, 26 Nov 2012 06:20:20 +0000 (-0300) Subject: [media] exynos-gsc: Correct the clock handling X-Git-Tag: next-20130218~80^2~6^2~205 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=21ae96d3973b926e89edf52bae560475105455ef;p=karo-tx-linux.git [media] exynos-gsc: Correct the clock handling 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 Signed-off-by: Sachin Kamat Signed-off-by: Sylwester Nawrocki Signed-off-by: Mauro Carvalho Chehab --- diff --git a/drivers/media/platform/exynos-gsc/gsc-core.c b/drivers/media/platform/exynos-gsc/gsc-core.c index 45bcfa7506db..c8b82c006bd0 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;