netdev - [PATCH v2 net] net: Add error pointer check in otx2

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Message-ID: <20240923063323.1935-1-kdipendra88@gmail.com>
Date: Mon, 23 Sep 2024 06:33:22 +0000
From: Dipendra Khadka <kdipendra88@...il.com>
To: sgoutham@...vell.com,
	gakula@...vell.com,
	sbhatta@...vell.com,
	hkelam@...vell.com,
	davem@...emloft.net,
	edumazet@...gle.com,
	bcm-kernel-feedback-list@...adcom.com,
	kuba@...nel.org,
	pabeni@...hat.com
Cc: Dipendra Khadka <kdipendra88@...il.com>,
	netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2 net] net: Add error pointer check in otx2_flows.c

Adding error pointer check after calling otx2_mbox_get_rsp().

Signed-off-by: Dipendra Khadka <kdipendra88@...il.com>
---
v2:
 - Changed the subject to net
 - Changed the typo of the vairable from bfvp to pfvf
v1: https://lore.kernel.org/all/20240922185235.50413-1-kdipendra88@gmail.com/
 .../ethernet/marvell/octeontx2/nic/otx2_flows.c   | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_flows.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_flows.c
index 98c31a16c70b..8a67c124b524 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_flows.c
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_flows.c
@@ -120,6 +120,11 @@ int otx2_alloc_mcam_entries(struct otx2_nic *pfvf, u16 count)
 		rsp = (struct npc_mcam_alloc_entry_rsp *)otx2_mbox_get_rsp
 			(&pfvf->mbox.mbox, 0, &req->hdr);
 
+		if (IS_ERR(rsp)) {
+			mutex_unlock(&pfvf->mbox.lock);
+			return PTR_ERR(rsp);
+		}
+
 		for (ent = 0; ent < rsp->count; ent++)
 			flow_cfg->flow_ent[ent + allocated] = rsp->entry_list[ent];
 
@@ -198,6 +203,11 @@ int otx2_mcam_entry_init(struct otx2_nic *pfvf)
 	rsp = (struct npc_mcam_alloc_entry_rsp *)otx2_mbox_get_rsp
 	       (&pfvf->mbox.mbox, 0, &req->hdr);
 
+	if (IS_ERR(rsp)) {
+		mutex_unlock(&pfvf->mbox.lock);
+		return PTR_ERR(rsp);
+	}
+
 	if (rsp->count != req->count) {
 		netdev_info(pfvf->netdev,
 			    "Unable to allocate MCAM entries for ucast, vlan and vf_vlan\n");
@@ -233,6 +243,11 @@ int otx2_mcam_entry_init(struct otx2_nic *pfvf)
 	frsp = (struct npc_get_field_status_rsp *)otx2_mbox_get_rsp
 	       (&pfvf->mbox.mbox, 0, &freq->hdr);
 
+	if (IS_ERR(frsp)) {
+		mutex_unlock(&pfvf->mbox.lock);
+		return PTR_ERR(frsp);
+	}
+
 	if (frsp->enable) {
 		pfvf->flags |= OTX2_FLAG_RX_VLAN_SUPPORT;
 		pfvf->flags |= OTX2_FLAG_VF_VLAN_SUPPORT;
-- 
2.43.0