diff options
| author | Vasanthy Kolluri <vkolluri@cisco.com> | 2010-06-24 10:52:08 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-06-25 20:50:25 -0700 |
| commit | 506e1198413d28446f9a98792b2b38b6bf5f8295 (patch) | |
| tree | e86d4441f76ae2424128261a6df65a0256257dc6 /drivers/net/enic/vnic_rq.c | |
| parent | 1825aca667196f75b193e2d509ea96ffdc8db0ca (diff) | |
enic: Bug Fix: Handle surprise hardware removals
Handle surprise hardware removals gracefully during devcmd issue and init,
cleanup of queues.
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>
Diffstat (limited to 'drivers/net/enic/vnic_rq.c')
| -rw-r--r-- | drivers/net/enic/vnic_rq.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/net/enic/vnic_rq.c b/drivers/net/enic/vnic_rq.c index 45cfc79f9f9..061a26fbbbf 100644 --- a/drivers/net/enic/vnic_rq.c +++ b/drivers/net/enic/vnic_rq.c @@ -146,6 +146,11 @@ void vnic_rq_init(struct vnic_rq *rq, unsigned int cq_index, /* Use current fetch_index as the ring starting point */ fetch_index = ioread32(&rq->ctrl->fetch_index); + if (fetch_index == 0xFFFFFFFF) { /* check for hardware gone */ + /* Hardware surprise removal: reset fetch_index */ + fetch_index = 0; + } + vnic_rq_init_start(rq, cq_index, fetch_index, fetch_index, error_interrupt_enable, @@ -187,8 +192,6 @@ void vnic_rq_clean(struct vnic_rq *rq, u32 fetch_index; unsigned int count = rq->ring.desc_count; - BUG_ON(ioread32(&rq->ctrl->enable)); - buf = rq->to_clean; while (vnic_rq_desc_used(rq) > 0) { @@ -201,6 +204,12 @@ void vnic_rq_clean(struct vnic_rq *rq, /* Use current fetch_index as the ring starting point */ fetch_index = ioread32(&rq->ctrl->fetch_index); + + if (fetch_index == 0xFFFFFFFF) { /* check for hardware gone */ + /* Hardware surprise removal: reset fetch_index */ + fetch_index = 0; + } + rq->to_use = rq->to_clean = &rq->bufs[fetch_index / VNIC_RQ_BUF_BLK_ENTRIES(count)] [fetch_index % VNIC_RQ_BUF_BLK_ENTRIES(count)]; |