VisionFive2 Linux kernel

StarFive Tech Linux Kernel for VisionFive (JH7110) boards (mirror)

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author: Hariprasad Kelam <hkelam@marvell.com> 2023-06-30 11:58:44 +0530 committer: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 2023-07-19 16:36:45 +0200 commit: b04872e15f3df62cb2fd530950f769626e1ef489 parent: 425a724a7c6e62c7257080f932c42b0570d013a0
Commit Summary:
octeontx2-af: Add validation before accessing cgx and lmac
Diffstat:
1 file changed, 7 insertions, 0 deletions
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/cgx.c b/drivers/net/ethernet/marvell/octeontx2/af/cgx.c
index bd77152bb8d7..f4bdca662d61 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/cgx.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/cgx.c
@@ -169,6 +169,9 @@ void cgx_lmac_write(int cgx_id, int lmac_id, u64 offset, u64 val)
 {
 	struct cgx *cgx_dev = cgx_get_pdata(cgx_id);
 
+	/* Software must not access disabled LMAC registers */
+	if (!is_lmac_valid(cgx_dev, lmac_id))
+		return;
 	cgx_write(cgx_dev, lmac_id, offset, val);
 }
 
@@ -176,6 +179,10 @@ u64 cgx_lmac_read(int cgx_id, int lmac_id, u64 offset)
 {
 	struct cgx *cgx_dev = cgx_get_pdata(cgx_id);
 
+	/* Software must not access disabled LMAC registers */
+	if (!is_lmac_valid(cgx_dev, lmac_id))
+		return 0;
+
 	return cgx_read(cgx_dev, lmac_id, offset);
 }