netdev - [net-next 14/17] i40e: use same check for Rx hang as for Rx timestamps

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]

Date:	Thu, 15 Jan 2015 04:19:25 -0800
From:	Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To:	davem@...emloft.net
Cc:	Jacob Keller <jacob.e.keller@...el.com>, netdev@...r.kernel.org,
	nhorman@...hat.com, sassmann@...hat.com, jogreene@...hat.com,
	Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: [net-next 14/17] i40e: use same check for Rx hang as for Rx timestamps

From: Jacob Keller <jacob.e.keller@...el.com>

It's possible that the user configured only Tx hardware timestamping,
and thus we might be receiving PTP traffic which we timestamp but which
software never reads. In this case we don't want to check for Rx
timestamp hang, because we already know that software won't be handling
them. Thus, we add the same check against pf->ptp_rx as we have in the
Rx timestamp code path.

Change-ID: I66486c8dba307facbff8eace4e52e2f083789d1b
Signed-off-by: Jacob Keller <jacob.e.keller@...el.com>
Acked-by: Shannon Nelson <shannon.nelson@...el.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
---
 drivers/net/ethernet/intel/i40e/i40e_ptp.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_ptp.c b/drivers/net/ethernet/intel/i40e/i40e_ptp.c
index 4f69a84..a55d47e 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_ptp.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_ptp.c
@@ -247,7 +247,12 @@ void i40e_ptp_rx_hang(struct i40e_vsi *vsi)
 	u32 prttsyn_stat;
 	int n;
 
-	if (!(pf->flags & I40E_FLAG_PTP))
+	/* Since we cannot turn off the Rx timestamp logic if the device is
+	 * configured for Tx timestamping, we check if Rx timestamping is
+	 * configured. We don't want to spuriously warn about Rx timestamp
+	 * hangs if we don't care about the timestamps.
+	 */
+	if (!(pf->flags & I40E_FLAG_PTP) || !pf->ptp_rx)
 		return;
 
 	prttsyn_stat = rd32(hw, I40E_PRTTSYN_STAT_1);
-- 
1.9.3

--
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