From: Zhen Lei thunder.leizhen@huawei.com
[ Upstream commit e020ac961ce5d038de66dc7f6ffca98899e9a3f3 ]
The error code returned by platform_get_irq() is stored in 'irq', it's forgotten to be copied to 'ret' before being returned. As a result, the value 0 of 'ret' is returned incorrectly.
After the above fix is completed, initializing the local variable 'ret' to 0 is no longer needed, remove it.
In addition, when dpu_mdss_init() is successfully returned, the value of 'ret' is always 0. Therefore, replace "return ret" with "return 0" to make the code clearer.
Fixes: 070e64dc1bbc ("drm/msm/dpu: Convert to a chained irq chip") Reported-by: Hulk Robot hulkci@huawei.com Signed-off-by: Zhen Lei thunder.leizhen@huawei.com Link: https://lore.kernel.org/r/20210510063805.3262-2-thunder.leizhen@huawei.com Reviewed-by: Stephen Boyd swboyd@chromium.org Reviewed-by: Dmitry Baryshkov dmitry.baryshkov@linaro.org Signed-off-by: Dmitry Baryshkov dmitry.baryshkov@linaro.org Signed-off-by: Rob Clark robdclark@chromium.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c index 3416e9617ee9..96f3908e4c5b 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c @@ -222,7 +222,7 @@ int dpu_mdss_init(struct drm_device *dev) struct msm_drm_private *priv = dev->dev_private; struct dpu_mdss *dpu_mdss; struct dss_module_power *mp; - int ret = 0; + int ret; int irq;
dpu_mdss = devm_kzalloc(dev->dev, sizeof(*dpu_mdss), GFP_KERNEL); @@ -250,8 +250,10 @@ int dpu_mdss_init(struct drm_device *dev) goto irq_domain_error;
irq = platform_get_irq(pdev, 0); - if (irq < 0) + if (irq < 0) { + ret = irq; goto irq_error; + }
irq_set_chained_handler_and_data(irq, dpu_mdss_irq, dpu_mdss); @@ -260,7 +262,7 @@ int dpu_mdss_init(struct drm_device *dev)
pm_runtime_enable(dev->dev);
- return ret; + return 0;
irq_error: _dpu_mdss_irq_domain_fini(dpu_mdss);