sfc: Disable interrupts after a fatal interrupt occurs until reset

This should avoid an interrupt storm, which has been observed in the
field with one faulty board.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/net/sfc/falcon.c b/drivers/net/sfc/falcon.c
index 3a5289fe8d1..d30c938d0fb 100644
--- a/drivers/net/sfc/falcon.c
+++ b/drivers/net/sfc/falcon.c
@@ -1374,10 +1374,11 @@ static irqreturn_t falcon_fatal_interrupt(struct efx_nic *efx)
                         EFX_OWORD_FMT "\n", EFX_OWORD_VAL(reg));
         }
 
-        /* Disable DMA bus mastering on both devices */
+        /* Disable both devices */
         pci_disable_device(efx->pci_dev);
         if (FALCON_IS_DUAL_FUNC(efx))
                 pci_disable_device(nic_data->pci_dev2);
+        falcon_disable_interrupts(efx);
 
         if (++n_int_errors < FALCON_MAX_INT_ERRORS) {
                 EFX_ERR(efx, "SYSTEM ERROR - reset scheduled\n");