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>

diff --git a/drivers/net/enic/vnic_rq.c b/drivers/net/enic/vnic_rq.c
index 7558397..7bcd903 100644 (file)
--- 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 d2e00e5..44fc323 100644 (file)
--- 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);