diff options
| author | Michael Chan <mchan@broadcom.com> | 2005-09-09 00:15:32 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2005-09-09 00:15:32 +0400 |
| commit | c921e4c4dbb043f9435414c4e661e7f0a783053d (patch) | |
| tree | 8cb7f7e657fae69a1f59509d586182a37c2635ed | |
| parent | 2e66fc41169c90d93b7811caf7e7822de6aa2259 (diff) | |
| download | linux-c921e4c4dbb043f9435414c4e661e7f0a783053d.tar.xz | |
[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 <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/bnx2.c | 7 | ||||
| -rw-r--r-- | 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 <linux/workqueue.h> #include <linux/crc32.h> +#include <linux/prefetch.h> /* Hardware data structures and register definitions automatically * generated from RTL code. Do not modify. |