net: broadcom: fix a mistake about ioremap resource

Commit d7a5502 ("net: broadcom: convert to devm_platform_ioremap_resource_byname()") will broke this driver. idm_base and nicpm_base were optional, after this change, they are mandatory. it will probe fails with -22 when the dtb doesn't have them defined. so revert part of this commit and make idm_base and nicpm_base as optional. Fixes: d7a5502 ("net: broadcom: convert to devm_platform_ioremap_resource_byname()") Reported-by: Jonathan Richardson <[email protected]> Cc: Scott Branden <[email protected]> Cc: Ray Jui <[email protected]> Cc: Florian Fainelli <[email protected]> Cc: David S. Miller <[email protected]> Signed-off-by: Dejin Zheng <[email protected]> Acked-by: Florian Fainelli <[email protected]> Signed-off-by: David S. Miller <[email protected]>
josf · May 5, 2020 · 755f573 · 755f573
1 parent bd4af43
commit 755f573
Showing 1 changed file with 15 additions and 9 deletions.
diff --git a/drivers/net/ethernet/broadcom/bgmac-platform.c b/drivers/net/ethernet/broadcom/bgmac-platform.c
@@ -172,6 +172,7 @@ static int bgmac_probe(struct platform_device *pdev)
 {
 	struct device_node *np = pdev->dev.of_node;
 	struct bgmac *bgmac;
+	struct resource *regs;
 	const u8 *mac_addr;
 
 	bgmac = bgmac_alloc(&pdev->dev);
@@ -206,16 +207,21 @@ static int bgmac_probe(struct platform_device *pdev)
 	if (IS_ERR(bgmac->plat.base))
 		return PTR_ERR(bgmac->plat.base);
 
-	bgmac->plat.idm_base =
-		devm_platform_ioremap_resource_byname(pdev, "idm_base");
-	if (IS_ERR(bgmac->plat.idm_base))
-		return PTR_ERR(bgmac->plat.idm_base);
-	bgmac->feature_flags &= ~BGMAC_FEAT_IDM_MASK;
+	regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "idm_base");
+	if (regs) {
+		bgmac->plat.idm_base = devm_ioremap_resource(&pdev->dev, regs);
+		if (IS_ERR(bgmac->plat.idm_base))
+			return PTR_ERR(bgmac->plat.idm_base);
+		bgmac->feature_flags &= ~BGMAC_FEAT_IDM_MASK;
+	}
 
-	bgmac->plat.nicpm_base =
-		devm_platform_ioremap_resource_byname(pdev, "nicpm_base");
-	if (IS_ERR(bgmac->plat.nicpm_base))
-		return PTR_ERR(bgmac->plat.nicpm_base);
+	regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "nicpm_base");
+	if (regs) {
+		bgmac->plat.nicpm_base = devm_ioremap_resource(&pdev->dev,
+							       regs);
+		if (IS_ERR(bgmac->plat.nicpm_base))
+			return PTR_ERR(bgmac->plat.nicpm_base);
+	}
 
 	bgmac->read = platform_bgmac_read;
 	bgmac->write = platform_bgmac_write;