From 1820859481722441dd63d986cd0a8787b0fb5880 Mon Sep 17 00:00:00 2001
From: Mark Starovoytov <mstarovoitov@marvell.com>
Date: Thu, 30 Apr 2020 11:04:34 +0300
Subject: [PATCH 55/56] net: atlantic: make hw_get_regs optional
Patch-mainline: v5.8-rc1
Git-commit: d0f23741c202c685447050713907f3be39a985ee
References: jsc#SLE-15148
This patch fixes potential crash in case if hw_get_regs is NULL.
Signed-off-by: Mark Starovoytov <mstarovoitov@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Denis Kirjanov <denis.kirjanov@suse.com>
---
drivers/net/ethernet/aquantia/atlantic/aq_nic.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_nic.c b/drivers/net/ethernet/aquantia/atlantic/aq_nic.c
index b609e1c05660..057a6ee3d2fa 100644
--- a/drivers/net/ethernet/aquantia/atlantic/aq_nic.c
+++ b/drivers/net/ethernet/aquantia/atlantic/aq_nic.c
@@ -762,6 +762,9 @@ int aq_nic_get_regs(struct aq_nic_s *self, struct ethtool_regs *regs, void *p)
u32 *regs_buff = p;
int err = 0;
+ if (unlikely(!self->aq_hw_ops->hw_get_regs))
+ return -EOPNOTSUPP;
+
regs->version = 1;
err = self->aq_hw_ops->hw_get_regs(self->aq_hw,
@@ -776,6 +779,9 @@ int aq_nic_get_regs(struct aq_nic_s *self, struct ethtool_regs *regs, void *p)
int aq_nic_get_regs_count(struct aq_nic_s *self)
{
+ if (unlikely(!self->aq_hw_ops->hw_get_regs))
+ return 0;
+
return self->aq_nic_cfg.aq_hw_caps->mac_regs_count;
}
--
2.16.4