From: Mark Starovoytov <mstarovoitov@xxxxxxxxxxx>
[ Upstream commit d0f23741c202c685447050713907f3be39a985ee ]
This patch fixes potential crash in case if hw_get_regs is NULL.
Signed-off-by: Mark Starovoytov <mstarovoitov@xxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
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 a369705a786a..e5391e0b84f8 100644
--- a/drivers/net/ethernet/aquantia/atlantic/aq_nic.c
+++ b/drivers/net/ethernet/aquantia/atlantic/aq_nic.c
@@ -764,6 +764,9 @@ 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,
@@ -778,6 +781,9 @@ 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;
}
--
2.25.1
