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bnxt_en: Disable interrupts when allocating CP rings or NQs.

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When calling firmware to allocate a CP ring or NQ, an interrupt associated
with that ring may be generated immediately before the doorbell is even
setup after the firmware call returns.  When servicing the interrupt, the
driver may crash when trying to access the doorbell.

Fix it by disabling interrupt on that vector until the doorbell is
set up.

Fixes: 697197e5a1 ("bnxt_en: Re-structure doorbells.")
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Michael Chan 2019-01-31 14:31:48 -05:00 committed by David S. Miller
parent da0e517166
commit 5e66e35aab
1 changed files with 7 additions and 1 deletions
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8
drivers/net/ethernet/broadcom/bnxt/bnxt.c
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@ -4973,12 +4973,18 @@ static int bnxt_hwrm_ring_alloc(struct bnxt *bp)
struct bnxt_cp_ring_info *cpr = &bnapi->cp_ring;
struct bnxt_ring_struct *ring = &cpr->cp_ring_struct;
u32 map_idx = ring->map_idx;
unsigned int vector;
vector = bp->irq_tbl[map_idx].vector;
disable_irq_nosync(vector);
rc = hwrm_ring_alloc_send_msg(bp, ring, type, map_idx);
if (rc)
if (rc) {
enable_irq(vector);
goto err_out;
}
bnxt_set_db(bp, &cpr->cp_db, type, map_idx, ring->fw_ring_id);
bnxt_db_nq(bp, &cpr->cp_db, cpr->cp_raw_cons);
enable_irq(vector);
bp->grp_info[i].cp_fw_ring_id = ring->fw_ring_id;
if (!i) {