linux-kernel - [PATCH v4 5/6] octeontx2-pf: handle otx2_mbox_get_rsp errors in otx2_dmac

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Message-ID: <20241017191355.32988-1-kdipendra88@gmail.com>
Date: Thu, 17 Oct 2024 19:13:54 +0000
From: Dipendra Khadka <kdipendra88@...il.com>
To: Sunil Goutham <sgoutham@...vell.com>,
	Geetha sowjanya <gakula@...vell.com>,
	Subbaraya Sundeep <sbhatta@...vell.com>,
	hariprasad <hkelam@...vell.com>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	"David S . Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Ratheesh Kannoth <rkannoth@...vell.com>
Cc: Dipendra Khadka <kdipendra88@...il.com>,
	horms@...nel.org,
	netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v4 5/6] octeontx2-pf: handle otx2_mbox_get_rsp errors in otx2_dmac_flt.c

Add error pointer checks after calling otx2_mbox_get_rsp().

Fixes: 79d2be385e9e ("octeontx2-pf: offload DMAC filters to CGX/RPM block")
Fixes: fa5e0ccb8f3a ("octeontx2-pf: Add support for exact match table.")
Signed-off-by: Dipendra Khadka <kdipendra88@...il.com>
---
v4:
 - Sent for patch series consistency.
v3: https://lore.kernel.org/all/20241006164617.2134-1-kdipendra88@gmail.com/
 .../net/ethernet/marvell/octeontx2/nic/otx2_dmac_flt.c   | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_dmac_flt.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_dmac_flt.c
index 80d853b343f9..2046dd0da00d 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_dmac_flt.c
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_dmac_flt.c
@@ -28,6 +28,11 @@ static int otx2_dmacflt_do_add(struct otx2_nic *pf, const u8 *mac,
 	if (!err) {
 		rsp = (struct cgx_mac_addr_add_rsp *)
 			 otx2_mbox_get_rsp(&pf->mbox.mbox, 0, &req->hdr);
+		if (IS_ERR(rsp)) {
+			mutex_unlock(&pf->mbox.lock);
+			return PTR_ERR(rsp);
+		}
+
 		*dmac_index = rsp->index;
 	}
 
@@ -200,6 +205,10 @@ int otx2_dmacflt_update(struct otx2_nic *pf, u8 *mac, u32 bit_pos)
 
 	rsp = (struct cgx_mac_addr_update_rsp *)
 		otx2_mbox_get_rsp(&pf->mbox.mbox, 0, &req->hdr);
+	if (IS_ERR(rsp)) {
+		rc = PTR_ERR(rsp);
+		goto out;
+	}
 
 	pf->flow_cfg->bmap_to_dmacindex[bit_pos] = rsp->index;
 
-- 
2.43.0