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cnic: Reset iSCSI EQ during shutdown.

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Without the reset, reloading the cnic driver can cause the iSCSI
Event Queue to be out of sync with the driver and cause intermittent
crash.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Acked-by: Ariel Elior <ariele@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Michael Chan
2012-12-05 10:10:14 +00:00
committed by David S. Miller
parent 0e1efe9d5e
commit caa9e931fe
2 changed files with 24 additions and 0 deletions
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19
drivers/net/ethernet/broadcom/cnic.c
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@@ -5344,8 +5344,27 @@ static void cnic_stop_bnx2_hw(struct cnic_dev *dev)
static void cnic_stop_bnx2x_hw(struct cnic_dev *dev)
{
struct cnic_local *cp = dev->cnic_priv;
u32 hc_index = HC_INDEX_ISCSI_EQ_CONS;
u32 sb_id = cp->status_blk_num;
u32 idx_off, syn_off;
cnic_free_irq(dev);
if (BNX2X_CHIP_IS_E2_PLUS(cp->chip_id)) {
idx_off = offsetof(struct hc_status_block_e2, index_values) +
(hc_index * sizeof(u16));
syn_off = CSTORM_HC_SYNC_LINE_INDEX_E2_OFFSET(hc_index, sb_id);
} else {
idx_off = offsetof(struct hc_status_block_e1x, index_values) +
(hc_index * sizeof(u16));
syn_off = CSTORM_HC_SYNC_LINE_INDEX_E1X_OFFSET(hc_index, sb_id);
}
CNIC_WR16(dev, BAR_CSTRORM_INTMEM + syn_off, 0);
CNIC_WR16(dev, BAR_CSTRORM_INTMEM + CSTORM_STATUS_BLOCK_OFFSET(sb_id) +
idx_off, 0);
*cp->kcq1.hw_prod_idx_ptr = 0;
CNIC_WR(dev, BAR_CSTRORM_INTMEM +
CSTORM_ISCSI_EQ_CONS_OFFSET(cp->pfid, 0), 0);