701-net-0161-staging-fsl-dpaa2-mac-Request-atomic-context-MC-port.patch

From 001bad547937cdd667adee45b5c7ebe78a1de1d0 Mon Sep 17 00:00:00 2001
From: Ioana Radulescu <ruxandra.radulescu@nxp.com>
Date: Fri, 22 Sep 2017 12:20:02 +0300
Subject: [PATCH] staging: fsl-dpaa2/mac: Request atomic context MC portals

The MAC driver may need to issue MC commands while in atomic
context (e.g. dpaa2_mac_get_stats can be called from a critical
section), so we need to use MC portals that don't sleep while
waiting for a command response to arrive.

Signed-off-by: Ioana Radulescu <ruxandra.radulescu@nxp.com>
---
 drivers/staging/fsl-dpaa2/mac/mac.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/staging/fsl-dpaa2/mac/mac.c
+++ b/drivers/staging/fsl-dpaa2/mac/mac.c
@@ -490,7 +490,9 @@ static int dpaa2_mac_probe(struct fsl_mc
 
 	dev_set_drvdata(dev, priv);
 
-	err = fsl_mc_portal_allocate(mc_dev, 0, &mc_dev->mc_io);
+	/* We may need to issue MC commands while in atomic context */
+	err = fsl_mc_portal_allocate(mc_dev, FSL_MC_IO_ATOMIC_CONTEXT_PORTAL,
+				     &mc_dev->mc_io);
 	if (err || !mc_dev->mc_io) {
 		dev_err(dev, "fsl_mc_portal_allocate error: %d\n", err);
 		err = -ENODEV;