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>
diff --git a/drivers/net/bnx2x_main.c b/drivers/net/bnx2x_main.c
index 4b84f6c..d3e7775 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 @@
/* 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 @@
cnt = 1000;
smp_rmb();
- while (bnx2x_has_tx_work(fp)) {
+ while (bnx2x_has_tx_work_unload(fp)) {
bnx2x_tx_int(fp, 1000);
if (!cnt) {