[PATCH] drm/vc4: hdmi: Fix NULL vs IS_ERR() checks in vc5_hdmi_init_resources()

[PATCH] drm/vc4: hdmi: Fix NULL vs IS_ERR() checks in vc5_hdmi_init_resources()

[Dan Carpenter]

The devm_ioremap() function never returns error pointers, it returns
NULL.

Fixes: 8323989140f3 ("drm/vc4: hdmi: Support the BCM2711 HDMI controllers")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
 drivers/gpu/drm/vc4/vc4_hdmi.c | 32 ++++++++++++++++----------------
 1 file changed, 16 insertions(+), 16 deletions(-)

diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
index d0792915436c..03825596a308 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -1545,64 +1545,64 @@ static int vc5_hdmi_init_resources(struct vc4_hdmi *vc4_hdmi)
 
 	vc4_hdmi->hdmicore_regs = devm_ioremap(dev, res->start,
 					       resource_size(res));
-	if (IS_ERR(vc4_hdmi->hdmicore_regs))
-		return PTR_ERR(vc4_hdmi->hdmicore_regs);
+	if (!vc4_hdmi->hdmicore_regs)
+		return -ENOMEM;
 
 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hd");
 	if (!res)
 		return -ENODEV;
 
 	vc4_hdmi->hd_regs = devm_ioremap(dev, res->start, resource_size(res));
-	if (IS_ERR(vc4_hdmi->hd_regs))
-		return PTR_ERR(vc4_hdmi->hd_regs);
+	if (!vc4_hdmi->hd_regs)
+		return -ENOMEM;
 
 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "cec");
 	if (!res)
 		return -ENODEV;
 
 	vc4_hdmi->cec_regs = devm_ioremap(dev, res->start, resource_size(res));
-	if (IS_ERR(vc4_hdmi->cec_regs))
-		return PTR_ERR(vc4_hdmi->cec_regs);
+	if (!vc4_hdmi->cec_regs)
+		return -ENOMEM;
 
 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "csc");
 	if (!res)
 		return -ENODEV;
 
 	vc4_hdmi->csc_regs = devm_ioremap(dev, res->start, resource_size(res));
-	if (IS_ERR(vc4_hdmi->csc_regs))
-		return PTR_ERR(vc4_hdmi->csc_regs);
+	if (!vc4_hdmi->csc_regs)
+		return -ENOMEM;
 
 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dvp");
 	if (!res)
 		return -ENODEV;
 
 	vc4_hdmi->dvp_regs = devm_ioremap(dev, res->start, resource_size(res));
-	if (IS_ERR(vc4_hdmi->dvp_regs))
-		return PTR_ERR(vc4_hdmi->dvp_regs);
+	if (!vc4_hdmi->dvp_regs)
+		return -ENOMEM;
 
 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phy");
 	if (!res)
 		return -ENODEV;
 
 	vc4_hdmi->phy_regs = devm_ioremap(dev, res->start, resource_size(res));
-	if (IS_ERR(vc4_hdmi->phy_regs))
-		return PTR_ERR(vc4_hdmi->phy_regs);
+	if (!vc4_hdmi->phy_regs)
+		return -ENOMEM;
 
 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "packet");
 	if (!res)
 		return -ENODEV;
 
 	vc4_hdmi->ram_regs = devm_ioremap(dev, res->start, resource_size(res));
-	if (IS_ERR(vc4_hdmi->ram_regs))
-		return PTR_ERR(vc4_hdmi->ram_regs);
+	if (!vc4_hdmi->ram_regs)
+		return -ENOMEM;
 
 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "rm");
 	if (!res)
 		return -ENODEV;
 
 	vc4_hdmi->rm_regs = devm_ioremap(dev, res->start, resource_size(res));
-	if (IS_ERR(vc4_hdmi->rm_regs))
-		return PTR_ERR(vc4_hdmi->rm_regs);
+	if (!vc4_hdmi->rm_regs)
+		return -ENOMEM;
 
 	vc4_hdmi->hsm_clock = devm_clk_get(dev, "hdmi");
 	if (IS_ERR(vc4_hdmi->hsm_clock)) {
-- 
2.28.0

Re: [PATCH] drm/vc4: hdmi: Fix NULL vs IS_ERR() checks in vc5_hdmi_init_resources()

[Maxime Ripard]

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On Thu, Sep 10, 2020 at 01:08:25PM +0300, Dan Carpenter wrote:
> The devm_ioremap() function never returns error pointers, it returns
> NULL.
> 
> Fixes: 8323989140f3 ("drm/vc4: hdmi: Support the BCM2711 HDMI controllers")
> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>

Applied, thanks!
Maxime

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