From c921e4c4dbb043f9435414c4e661e7f0a783053d Mon Sep 17 00:00:00 2001 From: Michael Chan Date: Thu, 8 Sep 2005 13:15:32 -0700 Subject: [PATCH] [BNX2]: Fix bug in irq handler and add prefetch Fix bug in bnx2_interrupt() that caused an unnecessary register read. The BNX2_PCICFG_MISC_STATUS should only be read when the status tag has not changed. Add prefetch of the status block in bnx2_msi() similar to tg3_msi(). The status block is not touched in bnx2_msi() and prefetching it will speed up bnx2_poll() that will run on the same CPU that received the MSI. Update version. Signed-off-by: Michael Chan Signed-off-by: David S. Miller --- drivers/net/bnx2.c | 7 ++++--- drivers/net/bnx2.h | 1 + 2 files changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/net/bnx2.c b/drivers/net/bnx2.c index 55a72c7ad001..83598e32179c 100644 --- a/drivers/net/bnx2.c +++ b/drivers/net/bnx2.c @@ -14,8 +14,8 @@ #define DRV_MODULE_NAME "bnx2" #define PFX DRV_MODULE_NAME ": " -#define DRV_MODULE_VERSION "1.2.20" -#define DRV_MODULE_RELDATE "August 22, 2005" +#define DRV_MODULE_VERSION "1.2.21" +#define DRV_MODULE_RELDATE "September 7, 2005" #define RUN_AT(x) (jiffies + (x)) @@ -1533,6 +1533,7 @@ bnx2_msi(int irq, void *dev_instance, struct pt_regs *regs) struct net_device *dev = dev_instance; struct bnx2 *bp = dev->priv; + prefetch(bp->status_blk); REG_WR(bp, BNX2_PCICFG_INT_ACK_CMD, BNX2_PCICFG_INT_ACK_CMD_USE_INT_HC_PARAM | BNX2_PCICFG_INT_ACK_CMD_MASK_INT); @@ -1558,7 +1559,7 @@ bnx2_interrupt(int irq, void *dev_instance, struct pt_regs *regs) * When using MSI, the MSI message will always complete after * the status block write. */ - if ((bp->status_blk->status_idx == bp->last_status_idx) || + if ((bp->status_blk->status_idx == bp->last_status_idx) && (REG_RD(bp, BNX2_PCICFG_MISC_STATUS) & BNX2_PCICFG_MISC_STATUS_INTA_VALUE)) return IRQ_NONE; diff --git a/drivers/net/bnx2.h b/drivers/net/bnx2.h index 9ad3f5740cd8..62857b6a6ee4 100644 --- a/drivers/net/bnx2.h +++ b/drivers/net/bnx2.h @@ -50,6 +50,7 @@ #endif #include #include +#include /* Hardware data structures and register definitions automatically * generated from RTL code. Do not modify. -- 2.20.1