diff options
| author | Sylwester Nawrocki <s.nawrocki@samsung.com> | 2013-01-29 06:42:28 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2013-02-05 17:50:25 -0200 |
| commit | b71b56b264ae27f32784973d15bfdfbc7df6d579 (patch) | |
| tree | a0185918fe6ead4e004a5dbfa42a5a5a3eb1051f /drivers/media/platform/s5p-fimc/fimc-core.c | |
| parent | 7b43a6f3f517109c2912d82f7f666a84420689bc (diff) | |
[media] s5p-fimc: Check return value of clk_enable/clk_set_rate
clk_set_rate(), clk_enable() functions can fail, so check the return
values to avoid surprises. While at it use ERR_PTR() value to indicate
an invalid clock.
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/platform/s5p-fimc/fimc-core.c')
| -rw-r--r-- | drivers/media/platform/s5p-fimc/fimc-core.c | 24 |
1 files changed, 18 insertions, 6 deletions
diff --git a/drivers/media/platform/s5p-fimc/fimc-core.c b/drivers/media/platform/s5p-fimc/fimc-core.c index 6d5b03a7b5e..a9625414ea9 100644 --- a/drivers/media/platform/s5p-fimc/fimc-core.c +++ b/drivers/media/platform/s5p-fimc/fimc-core.c @@ -808,11 +808,11 @@ static void fimc_clk_put(struct fimc_dev *fimc) { int i; for (i = 0; i < MAX_FIMC_CLOCKS; i++) { - if (IS_ERR_OR_NULL(fimc->clock[i])) + if (IS_ERR(fimc->clock[i])) continue; clk_unprepare(fimc->clock[i]); clk_put(fimc->clock[i]); - fimc->clock[i] = NULL; + fimc->clock[i] = ERR_PTR(-EINVAL); } } @@ -820,14 +820,19 @@ static int fimc_clk_get(struct fimc_dev *fimc) { int i, ret; + for (i = 0; i < MAX_FIMC_CLOCKS; i++) + fimc->clock[i] = ERR_PTR(-EINVAL); + for (i = 0; i < MAX_FIMC_CLOCKS; i++) { fimc->clock[i] = clk_get(&fimc->pdev->dev, fimc_clocks[i]); - if (IS_ERR(fimc->clock[i])) + if (IS_ERR(fimc->clock[i])) { + ret = PTR_ERR(fimc->clock[i]); goto err; + } ret = clk_prepare(fimc->clock[i]); if (ret < 0) { clk_put(fimc->clock[i]); - fimc->clock[i] = NULL; + fimc->clock[i] = ERR_PTR(-EINVAL); goto err; } } @@ -921,8 +926,14 @@ static int fimc_probe(struct platform_device *pdev) ret = fimc_clk_get(fimc); if (ret) return ret; - clk_set_rate(fimc->clock[CLK_BUS], drv_data->lclk_frequency); - clk_enable(fimc->clock[CLK_BUS]); + + ret = clk_set_rate(fimc->clock[CLK_BUS], drv_data->lclk_frequency); + if (ret < 0) + return ret; + + ret = clk_enable(fimc->clock[CLK_BUS]); + if (ret < 0) + return ret; ret = devm_request_irq(&pdev->dev, res->start, fimc_irq_handler, 0, dev_name(&pdev->dev), fimc); @@ -956,6 +967,7 @@ err_pm: err_sd: fimc_unregister_capture_subdev(fimc); err_clk: + clk_disable(fimc->clock[CLK_BUS]); fimc_clk_put(fimc); return ret; } |