From: Ben Hutchings <bhutchings@solarflare.com>
Date: Mon, 1 Sep 2008 11:50:14 +0000 (+0100)
Subject: sfc: Disable interrupts after a fatal interrupt occurs until reset
X-Git-Tag: upstream/snapshot3+hdmi~22513^2~195^2~46
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=0a62f1a681006719c226a682dbcfb4358c8b3d28;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git

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>
---

diff --git a/drivers/net/sfc/falcon.c b/drivers/net/sfc/falcon.c
index 3a5289f..d30c938 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");