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Date:      Fri, 8 Feb 2019 20:34:47 +0000 (UTC)
From:      Patrick Kelsey <pkelsey@FreeBSD.org>
To:        src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org
Subject:   svn commit: r343919 - head/sys/dev/e1000
Message-ID:  <201902082034.x18KYl58012808@repo.freebsd.org>

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Author: pkelsey
Date: Fri Feb  8 20:34:47 2019
New Revision: 343919
URL: https://svnweb.freebsd.org/changeset/base/343919

Log:
  Fix em(4) interrupt routing
  
  When configured with more tx queues than rx queues,
  em_if_msix_intr_assign() was incorrectly routing the tx event
  interrupts.
  
  Reviewed by:	erj, marius
  MFC after:	1 week
  Differential Revision:	https://reviews.freebsd.org/D19070

Modified:
  head/sys/dev/e1000/if_em.c

Modified: head/sys/dev/e1000/if_em.c
==============================================================================
--- head/sys/dev/e1000/if_em.c	Fri Feb  8 19:19:31 2019	(r343918)
+++ head/sys/dev/e1000/if_em.c	Fri Feb  8 20:34:47 2019	(r343919)
@@ -1996,7 +1996,7 @@ em_if_msix_intr_assign(if_ctx_t ctx, int msix)
 		    &adapter->rx_queues[i % adapter->rx_num_queues].que_irq,
 		    IFLIB_INTR_TX, tx_que, tx_que->me, buf);
 
-		tx_que->msix = (vector % adapter->tx_num_queues);
+		tx_que->msix = (vector % adapter->rx_num_queues);
 
 		/*
 		 * Set the bit to enable interrupt
@@ -2009,9 +2009,9 @@ em_if_msix_intr_assign(if_ctx_t ctx, int msix)
 			adapter->ims |= tx_que->eims;
 			adapter->ivars |= (8 | tx_que->msix) << (8 + (i * 4));
 		} else if (adapter->hw.mac.type == e1000_82575) {
-			tx_que->eims = E1000_EICR_TX_QUEUE0 << (i %  adapter->tx_num_queues);
+			tx_que->eims = E1000_EICR_TX_QUEUE0 << i;
 		} else {
-			tx_que->eims = 1 << (i %  adapter->tx_num_queues);
+			tx_que->eims = 1 << i;
 		}
 	}
 



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