[PATCH] net/i40e: fix shifts of 32-bit value

[PATCH] net/i40e: fix shifts of 32-bit value

[Beilei Xing]

Cppcheck reports following error,
(error) Shifting 32-bit value by 36 bits is undefined behaviour

According to datasheet, there's PHY type and PHY type extension
in setting PHY config command, should exclude PHY type extension
when setting PHY type.

Fixes: 1bb8f661168d ("net/i40e: fix link down and negotiation")

Signed-off-by: Beilei Xing <beilei.xing@intel.com>
---
 drivers/net/i40e/i40e_ethdev.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
index 7d4f1c9..9792205 100644
--- a/drivers/net/i40e/i40e_ethdev.c
+++ b/drivers/net/i40e/i40e_ethdev.c
@@ -2065,8 +2065,8 @@ i40e_phy_conf_link(struct i40e_hw *hw,
 
 
 
-	/* To enable link, phy_type mask needs to include each type */
-	for (cnt = I40E_PHY_TYPE_SGMII; cnt < I40E_PHY_TYPE_MAX; cnt++)
+	/* PHY type mask needs to include each type except PHY type extension */
+	for (cnt = I40E_PHY_TYPE_SGMII; cnt < I40E_PHY_TYPE_25GBASE_KR; cnt++)
 		phy_type_mask |= 1 << cnt;
 
 	/* use get_phy_abilities_resp value for the rest */
-- 
2.5.5

Re: [PATCH] net/i40e: fix shifts of 32-bit value

[Ferruh Yigit]

On 5/23/2018 8:46 AM, Beilei Xing wrote:
> Cppcheck reports following error,
> (error) Shifting 32-bit value by 36 bits is undefined behaviour
> 
> According to datasheet, there's PHY type and PHY type extension
> in setting PHY config command, should exclude PHY type extension
> when setting PHY type.
> 
> Fixes: 1bb8f661168d ("net/i40e: fix link down and negotiation")
> 
> Signed-off-by: Beilei Xing <beilei.xing@intel.com>

Hi Beilei,

This patc was late for rc5, it will be considered for next release.

Thanks,
ferruh

Re: [PATCH] net/i40e: fix shifts of 32-bit value

[Zhang, Qi Z]

> -----Original Message-----
> From: Xing, Beilei
> Sent: Wednesday, May 23, 2018 3:47 PM
> To: Zhang, Qi Z <qi.z.zhang@intel.com>
> Cc: dev@dpdk.org; Guo, Jia <jia.guo@intel.com>
> Subject: [PATCH] net/i40e: fix shifts of 32-bit value
> 
> Cppcheck reports following error,
> (error) Shifting 32-bit value by 36 bits is undefined behaviour
> 
> According to datasheet, there's PHY type and PHY type extension in setting PHY
> config command, should exclude PHY type extension when setting PHY type.
> 
> Fixes: 1bb8f661168d ("net/i40e: fix link down and negotiation")
> 
> Signed-off-by: Beilei Xing <beilei.xing@intel.com>

Acked-by: Qi Zhang <qi.z.zhang@intel.com>

Applied to dpdk-next-net-intel

Thanks!
Qi