diff options
| author | Andrzej Hajda <a.hajda@samsung.com> | 2013-10-09 13:43:58 +0200 |
|---|---|---|
| committer | Chanho Park <chanho61.park@samsung.com> | 2014-11-18 11:44:55 +0900 |
| commit | a325dad20d3102f2dde1e2df878a49b04e1485cc (patch) | |
| tree | 5efdb89f3853da3fd0309b5a55c8116c22596d88 /drivers/gpu/drm | |
| parent | 68e391d3be17aaf8c7aebef9e6e15f91a4ac85d9 (diff) | |
| download | linux-3.10-a325dad20d3102f2dde1e2df878a49b04e1485cc.tar.gz linux-3.10-a325dad20d3102f2dde1e2df878a49b04e1485cc.tar.bz2 linux-3.10-a325dad20d3102f2dde1e2df878a49b04e1485cc.zip | |
exynos_drm_fimc: replace mutex by spinlock
Function fimc_dst_set_buf_seq is called
by irq handler so it should not use mutexes.
This patch fixes it.
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Diffstat (limited to 'drivers/gpu/drm')
| -rw-r--r-- | drivers/gpu/drm/exynos/exynos_drm_fimc.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimc.c b/drivers/gpu/drm/exynos/exynos_drm_fimc.c index 455266ee412..d6e7bf4033d 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_fimc.c +++ b/drivers/gpu/drm/exynos/exynos_drm_fimc.c @@ -18,6 +18,7 @@ #include <linux/clk.h> #include <linux/pm_runtime.h> #include <linux/of.h> +#include <linux/spinlock.h> #include <drm/drmP.h> #include <drm/exynos_drm.h> @@ -158,7 +159,7 @@ struct fimc_context { struct exynos_drm_ippdrv ippdrv; struct resource *regs_res; void __iomem *regs; - struct mutex lock; + spinlock_t lock; struct clk *clocks[FIMC_CLKS_MAX]; u32 clk_frequency; struct regmap *sysreg; @@ -1151,11 +1152,12 @@ static int fimc_dst_set_buf_seq(struct fimc_context *ctx, u32 buf_id, u32 cfg; u32 mask = 0x00000001 << buf_id; int ret = 0; + unsigned long flags; DRM_DEBUG_KMS("%s:buf_id[%d]buf_type[%d]\n", __func__, buf_id, buf_type); - mutex_lock(&ctx->lock); + spin_lock_irqsave(&ctx->lock, flags); /* mask register set */ cfg = fimc_read(ctx, EXYNOS_CIFCNTSEQ); @@ -1189,7 +1191,7 @@ static int fimc_dst_set_buf_seq(struct fimc_context *ctx, u32 buf_id, fimc_mask_irq(ctx, false, false, true); err_unlock: - mutex_unlock(&ctx->lock); + spin_unlock_irqrestore(&ctx->lock, flags); return ret; } @@ -1807,7 +1809,7 @@ static int fimc_probe(struct platform_device *pdev) DRM_DEBUG_KMS("%s:id[%d]ippdrv[0x%x]\n", __func__, ctx->id, (int)ippdrv); - mutex_init(&ctx->lock); + spin_lock_init(&ctx->lock); platform_set_drvdata(pdev, ctx); pm_runtime_set_active(dev); @@ -1838,7 +1840,6 @@ static int fimc_remove(struct platform_device *pdev) struct exynos_drm_ippdrv *ippdrv = &ctx->ippdrv; exynos_drm_ippdrv_unregister(ippdrv); - mutex_destroy(&ctx->lock); fimc_put_clocks(ctx); pm_runtime_set_suspended(dev); |