src/patches/suse-2.6.27.31/patches.drivers/bnx2x-First-slow-path-interrupt-race.patch

   1 From 0ef00459a638ae4f5d1e5326d3e50232fa80119f Mon Sep 17 00:00:00 2001
   2 From: Eilon Greenstein <eilong@broadcom.com>
   3 Date: Wed, 14 Jan 2009 21:31:08 -0800
   4 Subject: bnx2x: First slow path interrupt race
   5 Acked-by: Karsten Keil <kkeil@novell.com>
   6 Reference: bnc#472500
   7
   8 The "read for interrupts" flag must be set before enabling slow-path
   9 interrupts as well (and not just before fast-path interrupts)
  10
  11 Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
  12 Signed-off-by: David S. Miller <davem@davemloft.net>
  13 ---
  14  drivers/net/bnx2x_main.c |   18 +++++++++---------
  15  1 files changed, 9 insertions(+), 9 deletions(-)
  16
  17 Index: linux-2.6.27-bnx2x_2/drivers/net/bnx2x_main.c
  18 ===================================================================
  19 --- linux-2.6.27-bnx2x_2.orig/drivers/net/bnx2x_main.c
  20 +++ linux-2.6.27-bnx2x_2/drivers/net/bnx2x_main.c
  21 @@ -4815,6 +4815,15 @@ static void bnx2x_nic_init(struct bnx2x
  22         bnx2x_init_context(bp);
  23         bnx2x_init_internal(bp, load_code);
  24         bnx2x_init_ind_table(bp);
  25 +       bnx2x_stats_init(bp);
  26 +
  27 +       /* At this point, we are ready for interrupts */
  28 +       atomic_set(&bp->intr_sem, 0);
  29 +
  30 +       /* flush all before enabling interrupts */
  31 +       mb();
  32 +       mmiowb();
  33 +
  34         bnx2x_int_enable(bp);
  35  }
  36
  37 @@ -6423,17 +6432,8 @@ static int bnx2x_nic_load(struct bnx2x *
  38                 }
  39         }
  40
  41 -       bnx2x_stats_init(bp);
  42 -
  43         bp->state = BNX2X_STATE_OPENING_WAIT4_PORT;
  44
  45 -       /* Enable Rx interrupt handling before sending the ramrod
  46 -          as it's completed on Rx FP queue */
  47 -       bnx2x_napi_enable(bp);
  48 -
  49 -       /* Enable interrupt handling */
  50 -       atomic_set(&bp->intr_sem, 0);
  51 -
  52         rc = bnx2x_setup_leading(bp);
  53         if (rc) {
  54                 BNX2X_ERR("Setup leading failed!\n");