From b6d24eb663cdf4af9c08b37ad2e31056c5eb2561 Mon Sep 17 00:00:00 2001
From: Vasanthy Kolluri <vkolluri@cisco.com>
Date: Thu, 18 Mar 2010 16:19:49 +0000
Subject: [PATCH] enic: Bug Fix: Fix timeout for hardware Tx and Rx queue
disable operations
The timeout for hardware Tx and Rx queue disable operations is increased to
work-around an erratum for "unnamed" chipset where a DMA completion may take
upto 10ms. We have to wait atleast this long for hardware to signal that Tx
and Rx queues are quiesced.
Signed-off-by: Scott Feldman <scofeldm@cisco.com>
Signed-off-by: Vasanthy Kolluri <vkolluri@cisco.com>
Signed-off-by: Roopa Prabhu <roprabhu@cisco.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
drivers/net/enic/vnic_rq.c | 4 ++--
drivers/net/enic/vnic_wq.c | 4 ++--
2 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/net/enic/vnic_rq.c b/drivers/net/enic/vnic_rq.c
index 75583978a5e5..7bcd90373487 100644
--- a/drivers/net/enic/vnic_rq.c
+++ b/drivers/net/enic/vnic_rq.c
@@ -167,10 +167,10 @@ int vnic_rq_disable(struct vnic_rq *rq)
iowrite32(0, &rq->ctrl->enable);
/* Wait for HW to ACK disable request */
- for (wait = 0; wait < 100; wait++) {
+ for (wait = 0; wait < 1000; wait++) {
if (!(ioread32(&rq->ctrl->running)))
return 0;
- udelay(1);
+ udelay(10);
}
printk(KERN_ERR "Failed to disable RQ[%d]\n", rq->index);
diff --git a/drivers/net/enic/vnic_wq.c b/drivers/net/enic/vnic_wq.c
index d2e00e51b7b5..44fc3234d585 100644
--- a/drivers/net/enic/vnic_wq.c
+++ b/drivers/net/enic/vnic_wq.c
@@ -160,10 +160,10 @@ int vnic_wq_disable(struct vnic_wq *wq)
iowrite32(0, &wq->ctrl->enable);
/* Wait for HW to ACK disable request */
- for (wait = 0; wait < 100; wait++) {
+ for (wait = 0; wait < 1000; wait++) {
if (!(ioread32(&wq->ctrl->running)))
return 0;
- udelay(1);
+ udelay(10);
}
printk(KERN_ERR "Failed to disable WQ[%d]\n", wq->index);
--
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