From: Benjamin Poirier <bpoirier@suse.com>
To: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Cc: Alexander Duyck <alexander.duyck@gmail.com>,
Frank Steiner <steiner-reg@bio.ifi.lmu.de>,
Jesse Brandeburg <jesse.brandeburg@intel.com>,
Shannon Nelson <shannon.nelson@intel.com>,
Carolyn Wyborny <carolyn.wyborny@intel.com>,
Don Skidmore <donald.c.skidmore@intel.com>,
Matthew Vick <matthew.vick@intel.com>,
John Ronciak <john.ronciak@intel.com>,
Mitch Williams <mitch.a.williams@intel.com>,
intel-wired-lan@lists.osuosl.org, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH v2 3/4] e1000e: Do not write lsc to ics in msi-x mode
Date: Fri, 30 Oct 2015 10:31:03 -0700 [thread overview]
Message-ID: <1446226264-29660-4-git-send-email-bpoirier@suse.com> (raw)
In-Reply-To: <1446226264-29660-1-git-send-email-bpoirier@suse.com>
In msi-x mode, there is no handler for the lsc interrupt so there is no
point in writing that to ics now that we always assume Other interrupts
are caused by lsc.
Reviewed-by: Jasna Hodzic <jhodzic@ucdavis.edu>
Signed-off-by: Benjamin Poirier <bpoirier@suse.com>
---
drivers/net/ethernet/intel/e1000e/defines.h | 3 ++-
drivers/net/ethernet/intel/e1000e/netdev.c | 27 ++++++++++++++++-----------
2 files changed, 18 insertions(+), 12 deletions(-)
diff --git a/drivers/net/ethernet/intel/e1000e/defines.h b/drivers/net/ethernet/intel/e1000e/defines.h
index 133d407..f7c7804 100644
--- a/drivers/net/ethernet/intel/e1000e/defines.h
+++ b/drivers/net/ethernet/intel/e1000e/defines.h
@@ -441,12 +441,13 @@
#define E1000_IMS_RXQ1 E1000_ICR_RXQ1 /* Rx Queue 1 Interrupt */
#define E1000_IMS_TXQ0 E1000_ICR_TXQ0 /* Tx Queue 0 Interrupt */
#define E1000_IMS_TXQ1 E1000_ICR_TXQ1 /* Tx Queue 1 Interrupt */
-#define E1000_IMS_OTHER E1000_ICR_OTHER /* Other Interrupts */
+#define E1000_IMS_OTHER E1000_ICR_OTHER /* Other Interrupt */
/* Interrupt Cause Set */
#define E1000_ICS_LSC E1000_ICR_LSC /* Link Status Change */
#define E1000_ICS_RXSEQ E1000_ICR_RXSEQ /* Rx sequence error */
#define E1000_ICS_RXDMT0 E1000_ICR_RXDMT0 /* Rx desc min. threshold */
+#define E1000_ICS_OTHER E1000_ICR_OTHER /* Other Interrupt */
/* Transmit Descriptor Control */
#define E1000_TXDCTL_PTHRESH 0x0000003F /* TXDCTL Prefetch Threshold */
diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c
index 602fcc9..639fbe8 100644
--- a/drivers/net/ethernet/intel/e1000e/netdev.c
+++ b/drivers/net/ethernet/intel/e1000e/netdev.c
@@ -4131,10 +4131,23 @@ void e1000e_reset(struct e1000_adapter *adapter)
}
-int e1000e_up(struct e1000_adapter *adapter)
+/**
+ * e1000e_trigger_lsc - trigger a lsc interrupt
+ *
+ * Fire a link status change interrupt to start the watchdog.
+ **/
+static void e1000e_trigger_lsc(struct e1000_adapter *adapter)
{
struct e1000_hw *hw = &adapter->hw;
+ if (adapter->msix_entries)
+ ew32(ICS, E1000_ICS_OTHER);
+ else
+ ew32(ICS, E1000_ICS_LSC);
+}
+
+int e1000e_up(struct e1000_adapter *adapter)
+{
/* hardware has been reset, we need to reload some things */
e1000_configure(adapter);
@@ -4146,11 +4159,7 @@ int e1000e_up(struct e1000_adapter *adapter)
netif_start_queue(adapter->netdev);
- /* fire a link change interrupt to start the watchdog */
- if (adapter->msix_entries)
- ew32(ICS, E1000_ICS_LSC | E1000_ICR_OTHER);
- else
- ew32(ICS, E1000_ICS_LSC);
+ e1000e_trigger_lsc(adapter);
return 0;
}
@@ -4577,11 +4586,7 @@ static int e1000_open(struct net_device *netdev)
hw->mac.get_link_status = true;
pm_runtime_put(&pdev->dev);
- /* fire a link status change interrupt to start the watchdog */
- if (adapter->msix_entries)
- ew32(ICS, E1000_ICS_LSC | E1000_ICR_OTHER);
- else
- ew32(ICS, E1000_ICS_LSC);
+ e1000e_trigger_lsc(adapter);
return 0;
--
2.6.0
next prev parent reply other threads:[~2015-10-30 17:31 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-30 17:31 [PATCH v2 0/4] e1000e msi-x fixes Benjamin Poirier
2015-10-30 17:31 ` [PATCH v2 1/4] e1000e: Remove unreachable code Benjamin Poirier
2015-10-30 17:31 ` [PATCH v2 2/4] e1000e: Do not read icr in Other interrupt Benjamin Poirier
2015-10-30 19:19 ` Alexander Duyck
2015-11-04 23:19 ` Benjamin Poirier
2015-11-04 23:26 ` Alexander Duyck
2015-10-30 17:31 ` Benjamin Poirier [this message]
2015-10-30 17:31 ` [PATCH v2 4/4] e1000e: Fix msi-x interrupt automask Benjamin Poirier
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