From: Young Xiao <92siuyang@gmail.com>
To: jeffrey.t.kirsher@intel.com, davem@davemloft.net,
intel-wired-lan@lists.osuosl.org, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org
Cc: Young Xiao <92siuyang@gmail.com>
Subject: [PATCH] ixgbevf: fix possible divide by zero in ixgbevf_update_itr
Date: Tue, 28 May 2019 19:58:02 +0800 [thread overview]
Message-ID: <1559044682-23446-1-git-send-email-92siuyang@gmail.com> (raw)
The next call to ixgbevf_update_itr will continue to dynamically
update ITR.
Copy from commit bdbeefe8ea8c ("ixgbe: fix possible divide by zero in
ixgbe_update_itr")
Signed-off-by: Young Xiao <92siuyang@gmail.com>
---
drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
index d189ed2..d2b41f9 100644
--- a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
+++ b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
@@ -1423,6 +1423,9 @@ static void ixgbevf_update_itr(struct ixgbevf_q_vector *q_vector,
*/
/* what was last interrupt timeslice? */
timepassed_us = q_vector->itr >> 2;
+ if (timepassed_us == 0)
+ return;
+
bytes_perint = bytes / timepassed_us; /* bytes/usec */
switch (itr_setting) {
--
2.7.4
next reply other threads:[~2019-05-28 11:57 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-28 11:58 Young Xiao [this message]
2019-06-13 21:30 ` [Intel-wired-lan] " Bowers, AndrewX
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