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bnx2x: tx_has_work should not wait for FW

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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>
This commit is contained in:
Vladislav Zolotarov 2009-01-26 12:36:42 -08:00 committed by David S. Miller
parent 32ec803348
commit e8b5fc514d
1 changed files with 12 additions and 5 deletions
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17
drivers/net/bnx2x_main.c
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@ -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) {