liquidio VF: reduce load time of module

Reduce the load time of the VF driver by decreasing the wait time between
iterations of the loop that polls for a mailbox response from the PF. Also
change the wait time units from jiffies to milliseconds.

Signed-off-by: Prasad Kanneganti <prasad.kanneganti@cavium.com>
Signed-off-by: Felix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: Raghu Vatsavayi <raghu.vatsavayi@cavium.com>
Signed-off-by: Derek Chickles <derek.chickles@cavium.com>
Signed-off-by: Satanand Burla <satananda.burla@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/cavium/liquidio/octeon_mailbox.c

@@ -131,6 +131,7 @@ int octeon_mbox_write(struct octeon_device *oct,
 {
 	struct octeon_mbox *mbox = oct->mbox[mbox_cmd->q_no];
 	u32 count, i, ret = OCTEON_MBOX_STATUS_SUCCESS;
+	long timeout = LIO_MBOX_WRITE_WAIT_TIME;
 	unsigned long flags;
 
 	spin_lock_irqsave(&mbox->lock, flags);
@@ -158,7 +159,7 @@ int octeon_mbox_write(struct octeon_device *oct,
 	count = 0;
 
 	while (readq(mbox->mbox_write_reg) != OCTEON_PFVFSIG) {
-		schedule_timeout_uninterruptible(LIO_MBOX_WRITE_WAIT_TIME);
+		schedule_timeout_uninterruptible(timeout);
 		if (count++ == LIO_MBOX_WRITE_WAIT_CNT) {
 			ret = OCTEON_MBOX_STATUS_FAILED;
 			break;
@@ -171,7 +172,7 @@ int octeon_mbox_write(struct octeon_device *oct,
 			count = 0;
 			while (readq(mbox->mbox_write_reg) !=
 			       OCTEON_PFVFACK) {
-				schedule_timeout_uninterruptible(10);
+				schedule_timeout_uninterruptible(timeout);
 				if (count++ == LIO_MBOX_WRITE_WAIT_CNT) {
 					ret = OCTEON_MBOX_STATUS_FAILED;
 					break;

drivers/net/ethernet/cavium/liquidio/octeon_mailbox.h

@@ -31,8 +31,8 @@
 #define OCTEON_PFVFSIG			0x1122334455667788
 #define OCTEON_PFVFERR			0xDEADDEADDEADDEAD
 
-#define LIO_MBOX_WRITE_WAIT_CNT          1000
-#define LIO_MBOX_WRITE_WAIT_TIME           10
+#define LIO_MBOX_WRITE_WAIT_CNT         1000
+#define LIO_MBOX_WRITE_WAIT_TIME        msecs_to_jiffies(1)
 
 enum octeon_mbox_cmd_status {
 	OCTEON_MBOX_STATUS_SUCCESS = 0,