linux-kernel - [PATCH 1/2] ata: ahci_ceva: fix error handling for Xilinx GT PHY support

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Date: Fri, 19 Jan 2024 00:38:23 +0530
From: Radhey Shyam Pandey <radhey.shyam.pandey@....com>
To: <dlemoal@...nel.org>, <cassel@...nel.org>, <richardcochran@...il.com>,
	<piyush.mehta@...inx.com>, <axboe@...nel.dk>, <michal.simek@....com>
CC: <linux-ide@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<git@....com>, Piyush Mehta <piyush.mehta@....com>, Radhey Shyam Pandey
	<radhey.shyam.pandey@....com>
Subject: [PATCH 1/2] ata: ahci_ceva: fix error handling for Xilinx GT PHY support

From: Piyush Mehta <piyush.mehta@....com>

Platform clock and phy error resources are not cleaned up in Xilinx GT PHY
error path. To fix introduce error label for ahci_platform_disable_clks and
phy_power_off/exit and call them in error path. No functional change.

Fixes: 9a9d3abe24bb ("ata: ahci: ceva: Update the driver to support xilinx GT phy")
Signed-off-by: Piyush Mehta <piyush.mehta@....com>
Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@....com>
---
---
 drivers/ata/ahci_ceva.c | 47 +++++++++++++++++++++++++++++------------
 1 file changed, 33 insertions(+), 14 deletions(-)

diff --git a/drivers/ata/ahci_ceva.c b/drivers/ata/ahci_ceva.c
index 64f7f7d6ba84..bfc513f1d0b3 100644
--- a/drivers/ata/ahci_ceva.c
+++ b/drivers/ata/ahci_ceva.c
@@ -196,7 +196,7 @@ static int ceva_ahci_probe(struct platform_device *pdev)
 	struct ahci_host_priv *hpriv;
 	struct ceva_ahci_priv *cevapriv;
 	enum dev_dma_attr attr;
-	int rc;
+	int rc, i;
 
 	cevapriv = devm_kzalloc(dev, sizeof(*cevapriv), GFP_KERNEL);
 	if (!cevapriv)
@@ -219,8 +219,6 @@ static int ceva_ahci_probe(struct platform_device *pdev)
 		if (rc)
 			return rc;
 	} else {
-		int i;
-
 		rc = ahci_platform_enable_clks(hpriv);
 		if (rc)
 			return rc;
@@ -229,8 +227,11 @@ static int ceva_ahci_probe(struct platform_device *pdev)
 
 		for (i = 0; i < hpriv->nports; i++) {
 			rc = phy_init(hpriv->phys[i]);
-			if (rc)
-				return rc;
+			if (rc) {
+				while (--i >= 0)
+					phy_exit(hpriv->phys[i]);
+				goto disable_clks;
+			}
 		}
 
 		/* De-assert the controller reset */
@@ -240,7 +241,7 @@ static int ceva_ahci_probe(struct platform_device *pdev)
 			rc = phy_power_on(hpriv->phys[i]);
 			if (rc) {
 				phy_exit(hpriv->phys[i]);
-				return rc;
+				goto disable_phys;
 			}
 		}
 	}
@@ -252,52 +253,60 @@ static int ceva_ahci_probe(struct platform_device *pdev)
 	if (of_property_read_u8_array(np, "ceva,p0-cominit-params",
 					(u8 *)&cevapriv->pp2c[0], 4) < 0) {
 		dev_warn(dev, "ceva,p0-cominit-params property not defined\n");
-		return -EINVAL;
+		rc = -EINVAL;
+		goto disable_phys;
 	}
 
 	if (of_property_read_u8_array(np, "ceva,p1-cominit-params",
 					(u8 *)&cevapriv->pp2c[1], 4) < 0) {
 		dev_warn(dev, "ceva,p1-cominit-params property not defined\n");
-		return -EINVAL;
+		rc = -EINVAL;
+		goto disable_phys;
 	}
 
 	/* Read OOB timing value for COMWAKE from device-tree*/
 	if (of_property_read_u8_array(np, "ceva,p0-comwake-params",
 					(u8 *)&cevapriv->pp3c[0], 4) < 0) {
 		dev_warn(dev, "ceva,p0-comwake-params property not defined\n");
-		return -EINVAL;
+		rc = -EINVAL;
+		goto disable_phys;
 	}
 
 	if (of_property_read_u8_array(np, "ceva,p1-comwake-params",
 					(u8 *)&cevapriv->pp3c[1], 4) < 0) {
 		dev_warn(dev, "ceva,p1-comwake-params property not defined\n");
-		return -EINVAL;
+		rc = -EINVAL;
+		goto disable_phys;
 	}
 
 	/* Read phy BURST timing value from device-tree */
 	if (of_property_read_u8_array(np, "ceva,p0-burst-params",
 					(u8 *)&cevapriv->pp4c[0], 4) < 0) {
 		dev_warn(dev, "ceva,p0-burst-params property not defined\n");
-		return -EINVAL;
+		rc = -EINVAL;
+		goto disable_phys;
 	}
 
 	if (of_property_read_u8_array(np, "ceva,p1-burst-params",
 					(u8 *)&cevapriv->pp4c[1], 4) < 0) {
 		dev_warn(dev, "ceva,p1-burst-params property not defined\n");
-		return -EINVAL;
+		rc = -EINVAL;
+		goto disable_phys;
 	}
 
 	/* Read phy RETRY interval timing value from device-tree */
 	if (of_property_read_u16_array(np, "ceva,p0-retry-params",
 					(u16 *)&cevapriv->pp5c[0], 2) < 0) {
 		dev_warn(dev, "ceva,p0-retry-params property not defined\n");
-		return -EINVAL;
+		rc = -EINVAL;
+		goto disable_phys;
 	}
 
 	if (of_property_read_u16_array(np, "ceva,p1-retry-params",
 					(u16 *)&cevapriv->pp5c[1], 2) < 0) {
 		dev_warn(dev, "ceva,p1-retry-params property not defined\n");
-		return -EINVAL;
+		rc = -EINVAL;
+		goto disable_phys;
 	}
 
 	/*
@@ -321,6 +330,16 @@ static int ceva_ahci_probe(struct platform_device *pdev)
 
 disable_resources:
 	ahci_platform_disable_resources(hpriv);
+
+disable_phys:
+	while (--i >= 0) {
+		phy_power_off(hpriv->phys[i]);
+		phy_exit(hpriv->phys[i]);
+	}
+
+disable_clks:
+	ahci_platform_disable_clks(hpriv);
+
 	return rc;
 }
 
-- 
2.34.1