netdev - [PATCH net 1/2] bnx2x: correct reading of speed capabilities

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <1367418478-7416-2-git-send-email-yuvalmin@broadcom.com>
Date:	Wed, 1 May 2013 17:27:57 +0300
From:	"Yuval Mintz" <yuvalmin@...adcom.com>
To:	davem@...emloft.net, netdev@...r.kernel.org
cc:	eilong@...adcom.com, ariele@...adcom.com,
	"Yaniv Rosner" <yanivr@...adcom.com>,
	"Yuval Mintz" <yuvalmin@...adcom.com>
Subject: [PATCH net 1/2] bnx2x: correct reading of speed capabilities

From: Yaniv Rosner <yanivr@...adcom.com>

When the bnx2x driver reads the port configuration - mask irrelevant bits. 

Without this change, the unintended bits may cause the driver to needlessly
toggle the link, as a comparison in the link flap avoidance flow will show
that the old link did not advertise the same capabilities and thus cannot
be retained.

Signed-off-by: Yaniv Rosner <yanivr@...adcom.com>
Signed-off-by: Yuval Mintz <yuvalmin@...adcom.com>
Signed-off-by: Eilon Greenstein <eilong@...adcom.com>
---
 drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
index a8f1ee3..9cc39f1 100644
--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
@@ -10575,10 +10575,12 @@ static void bnx2x_get_port_hwinfo(struct bnx2x *bp)
 
 	bp->link_params.speed_cap_mask[0] =
 		SHMEM_RD(bp,
-			 dev_info.port_hw_config[port].speed_capability_mask);
+			 dev_info.port_hw_config[port].speed_capability_mask) &
+		PORT_HW_CFG_SPEED_CAPABILITY_D0_MASK;
 	bp->link_params.speed_cap_mask[1] =
 		SHMEM_RD(bp,
-			 dev_info.port_hw_config[port].speed_capability_mask2);
+			 dev_info.port_hw_config[port].speed_capability_mask2) &
+		PORT_HW_CFG_SPEED_CAPABILITY_D0_MASK;
 	bp->port.link_config[0] =
 		SHMEM_RD(bp, dev_info.port_feature_config[port].link_config);
 
-- 
1.8.1.227.g44fe835


--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html