clk_set_rate(), clk_enable() functions can fail, so check the return values to avoid surprises. While at it fix the error path and use ERR_PTR() value to indicate invalid clock. Signed-off-by: Sylwester Nawrocki <s.nawrocki@xxxxxxxxxxx> Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx> --- drivers/media/platform/s5p-fimc/mipi-csis.c | 29 ++++++++++++++++++--------- 1 file changed, 20 insertions(+), 9 deletions(-) diff --git a/drivers/media/platform/s5p-fimc/mipi-csis.c b/drivers/media/platform/s5p-fimc/mipi-csis.c index c25dbc4..b9eea8e 100644 --- a/drivers/media/platform/s5p-fimc/mipi-csis.c +++ b/drivers/media/platform/s5p-fimc/mipi-csis.c @@ -365,11 +365,11 @@ static void s5pcsis_clk_put(struct csis_state *state) int i; for (i = 0; i < NUM_CSIS_CLOCKS; i++) { - if (IS_ERR_OR_NULL(state->clock[i])) + if (IS_ERR(state->clock[i])) continue; clk_unprepare(state->clock[i]); clk_put(state->clock[i]); - state->clock[i] = NULL; + state->clock[i] = ERR_PTR(-EINVAL); } } @@ -378,14 +378,19 @@ static int s5pcsis_clk_get(struct csis_state *state) struct device *dev = &state->pdev->dev; int i, ret; + for (i = 0; i < NUM_CSIS_CLOCKS; i++) + state->clock[i] = ERR_PTR(-EINVAL); + for (i = 0; i < NUM_CSIS_CLOCKS; i++) { state->clock[i] = clk_get(dev, csi_clock_name[i]); - if (IS_ERR(state->clock[i])) + if (IS_ERR(state->clock[i])) { + ret = PTR_ERR(state->clock[i]); goto err; + } ret = clk_prepare(state->clock[i]); if (ret < 0) { clk_put(state->clock[i]); - state->clock[i] = NULL; + state->clock[i] = ERR_PTR(-EINVAL); goto err; } } @@ -393,7 +398,7 @@ static int s5pcsis_clk_get(struct csis_state *state) err: s5pcsis_clk_put(state); dev_err(dev, "failed to get clock: %s\n", csi_clock_name[i]); - return -ENXIO; + return ret; } static void dump_regs(struct csis_state *state, const char *label) @@ -825,19 +830,25 @@ static int __devinit s5pcsis_probe(struct platform_device *pdev) ret = s5pcsis_clk_get(state); if (ret) - goto e_clkput; + goto e_regput; - clk_enable(state->clock[CSIS_CLK_MUX]); if (state->clk_frequency) - clk_set_rate(state->clock[CSIS_CLK_MUX], state->clk_frequency); + ret = clk_set_rate(state->clock[CSIS_CLK_MUX], + state->clk_frequency); else dev_WARN(dev, "No clock frequency specified!\n"); + if (ret < 0) + goto e_clkput; + + ret = clk_enable(state->clock[CSIS_CLK_MUX]); + if (ret < 0) + goto e_clkput; ret = devm_request_irq(dev, state->irq, s5pcsis_irq_handler, 0, dev_name(dev), state); if (ret) { dev_err(dev, "Interrupt request failed\n"); - goto e_regput; + goto e_clkput; } v4l2_subdev_init(&state->sd, &s5pcsis_subdev_ops); -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html