diff options
| author |   Vladislav Zolotarov <vladz@broadcom.com> | 2009-01-26 12:36:42 -0800 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2009-01-26 12:36:42 -0800 |
| commit | e8b5fc514d1c7637cb4b8f77e7d8ac33ef66130c (patch) | |
| tree | 486a72b31cdadfe976b7baf181e90e0767b4dee5 /drivers/net/bnx2x_main.c | |
| parent | netxen: reduce memory footprint (diff) | |
| download | linux-dev-e8b5fc514d1c7637cb4b8f77e7d8ac33ef66130c.tar.xz linux-dev-e8b5fc514d1c7637cb4b8f77e7d8ac33ef66130c.zip | |
bnx2x: tx_has_work should not wait for FW
The current tx_has_work waited until all packets sent by the driver
are marked as completed by the FW. This is too greedy and it causes
the bnx2x_poll to spin in vain. The driver should only check that all
packets FW already completed are freed - only in unload flow the
driver should make sure that transmit queue is empty
Signed-off-by: Vladislav Zolotarov <vladz@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
| -rw-r--r-- | drivers/net/bnx2x_main.c | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/drivers/net/bnx2x_main.c b/drivers/net/bnx2x_main.c index 4b84f6ce5ed2..d3e7775a9ccf 100644 --- a/drivers/net/bnx2x_main.c +++ b/drivers/net/bnx2x_main.c @@ -57,8 +57,8 @@ #include "bnx2x.h" #include "bnx2x_init.h" -#define DRV_MODULE_VERSION "1.45.25" -#define DRV_MODULE_RELDATE "2009/01/22" +#define DRV_MODULE_VERSION "1.45.26" +#define DRV_MODULE_RELDATE "2009/01/26" #define BNX2X_BC_VER 0x040200 /* Time in jiffies before concluding the transmitter is hung */ @@ -740,8 +740,15 @@ static inline int bnx2x_has_tx_work(struct bnx2x_fastpath *fp) /* Tell compiler that status block fields can change */ barrier(); tx_cons_sb = le16_to_cpu(*fp->tx_cons_sb); - return ((fp->tx_pkt_prod != tx_cons_sb) || - (fp->tx_pkt_prod != fp->tx_pkt_cons)); + return (fp->tx_pkt_cons != tx_cons_sb); +} + +static inline int bnx2x_has_tx_work_unload(struct bnx2x_fastpath *fp) +{ + /* Tell compiler that consumer and producer can change */ + barrier(); + return (fp->tx_pkt_prod != fp->tx_pkt_cons); + } /* free skb in the packet ring at pos idx @@ -6729,7 +6736,7 @@ static int bnx2x_nic_unload(struct bnx2x *bp, int unload_mode) cnt = 1000; smp_rmb(); - while (bnx2x_has_tx_work(fp)) { + while (bnx2x_has_tx_work_unload(fp)) { bnx2x_tx_int(fp, 1000); if (!cnt) { |