From: Sai Krishna <saikrishnag@marvell.com>
Date: Thu, 6 Jul 2023 13:59:36 +0530
Subject: octeontx2-af: Move validation of ptp pointer before its usage
Patch-mainline: v6.5-rc2
Git-commit: 7709fbd4922c197efabda03660d93e48a3e80323
References: git-fixes

Moved PTP pointer validation before its use to avoid smatch warning.
Also used kzalloc/kfree instead of devm_kzalloc/devm_kfree.

Fixes: 2ef4e45d99b1 ("octeontx2-af: Add PTP PPS Errata workaround on CN10K silicon")
Signed-off-by: Naveen Mamindlapalli <naveenm@marvell.com>
Signed-off-by: Sunil Goutham <sgoutham@marvell.com>
Signed-off-by: Sai Krishna <saikrishnag@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/marvell/octeontx2/af/ptp.c |   19 +++++++++----------
 drivers/net/ethernet/marvell/octeontx2/af/rvu.c |    2 +-
 2 files changed, 10 insertions(+), 11 deletions(-)

--- a/drivers/net/ethernet/marvell/octeontx2/af/ptp.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/ptp.c
@@ -208,7 +208,7 @@ struct ptp *ptp_get(void)
 	/* Check driver is bound to PTP block */
 	if (!ptp)
 		ptp = ERR_PTR(-EPROBE_DEFER);
-	else
+	else if (!IS_ERR(ptp))
 		pci_dev_get(ptp->pdev);
 
 	return ptp;
@@ -388,11 +388,10 @@ static int ptp_extts_on(struct ptp *ptp,
 static int ptp_probe(struct pci_dev *pdev,
 		     const struct pci_device_id *ent)
 {
-	struct device *dev = &pdev->dev;
 	struct ptp *ptp;
 	int err;
 
-	ptp = devm_kzalloc(dev, sizeof(*ptp), GFP_KERNEL);
+	ptp = kzalloc(sizeof(*ptp), GFP_KERNEL);
 	if (!ptp) {
 		err = -ENOMEM;
 		goto error;
@@ -428,20 +427,19 @@ static int ptp_probe(struct pci_dev *pde
 	return 0;
 
 error_free:
-	devm_kfree(dev, ptp);
+	kfree(ptp);
 
 error:
 	/* For `ptp_get()` we need to differentiate between the case
 	 * when the core has not tried to probe this device and the case when
-	 * the probe failed.  In the later case we pretend that the
-	 * initialization was successful and keep the error in
+	 * the probe failed.  In the later case we keep the error in
 	 * `dev->driver_data`.
 	 */
 	pci_set_drvdata(pdev, ERR_PTR(err));
 	if (!first_ptp_block)
 		first_ptp_block = ERR_PTR(err);
 
-	return 0;
+	return err;
 }
 
 static void ptp_remove(struct pci_dev *pdev)
@@ -449,16 +447,17 @@ static void ptp_remove(struct pci_dev *p
 	struct ptp *ptp = pci_get_drvdata(pdev);
 	u64 clock_cfg;
 
-	if (cn10k_ptp_errata(ptp) && hrtimer_active(&ptp->hrtimer))
-		hrtimer_cancel(&ptp->hrtimer);
-
 	if (IS_ERR_OR_NULL(ptp))
 		return;
 
+	if (cn10k_ptp_errata(ptp) && hrtimer_active(&ptp->hrtimer))
+		hrtimer_cancel(&ptp->hrtimer);
+
 	/* Disable PTP clock */
 	clock_cfg = readq(ptp->reg_base + PTP_CLOCK_CFG);
 	clock_cfg &= ~PTP_CLOCK_CFG_PTP_EN;
 	writeq(clock_cfg, ptp->reg_base + PTP_CLOCK_CFG);
+	kfree(ptp);
 }
 
 static const struct pci_device_id ptp_id_table[] = {
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu.c
@@ -3192,7 +3192,7 @@ static int rvu_probe(struct pci_dev *pde
 	rvu->ptp = ptp_get();
 	if (IS_ERR(rvu->ptp)) {
 		err = PTR_ERR(rvu->ptp);
-		if (err == -EPROBE_DEFER)
+		if (err)
 			goto err_release_regions;
 		rvu->ptp = NULL;
 	}