linux-kernel - [PATCH 05/10] staging: fsl-mc: Changed DPRC built-in portal's mc

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Message-ID: <1445874561-14761-6-git-send-email-German.Rivera@freescale.com>
Date:	Mon, 26 Oct 2015 10:49:16 -0500
From:	"J. German Rivera" <German.Rivera@...escale.com>
To:	<gregkh@...uxfoundation.org>, <arnd@...db.de>,
	<devel@...verdev.osuosl.org>, <linux-kernel@...r.kernel.org>
CC:	<stuart.yoder@...escale.com>, <itai.katz@...escale.com>,
	<lijun.pan@...escale.com>, <leoli@...escale.com>,
	<scottwood@...escale.com>, <agraf@...e.de>,
	<bhamciu1@...escale.com>, <R89243@...escale.com>,
	<bhupesh.sharma@...escale.com>, <nir.erez@...escale.com>,
	<richard.schmitt@...escale.com>, <dan.carpenter@...cle.com>,
	<marc.zyngier@....com>, <jiang.liu@...ux.intel.com>,
	"J. German Rivera" <German.Rivera@...escale.com>
Subject: [PATCH 05/10] staging: fsl-mc: Changed DPRC built-in portal's mc_io to be atomic

The DPRC built-in portal's mc_io is used to send commands to the MC
to program MSIs for MC objects. This is done by the
fsl_mc_msi_write_msg() callback, which is invoked by the generic MSI
layer with interrupts disabled. As a result, the mc_io used in
fsl_mc_msi_write_msg needs to be an atomic mc_io.

Signed-off-by: J. German Rivera <German.Rivera@...escale.com>
---
 drivers/staging/fsl-mc/bus/dprc-driver.c | 4 +++-
 drivers/staging/fsl-mc/bus/mc-bus.c      | 3 ++-
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/fsl-mc/bus/dprc-driver.c b/drivers/staging/fsl-mc/bus/dprc-driver.c
index a9ead0d..7bb30dd 100644
--- a/drivers/staging/fsl-mc/bus/dprc-driver.c
+++ b/drivers/staging/fsl-mc/bus/dprc-driver.c
@@ -396,7 +396,9 @@ static int dprc_probe(struct fsl_mc_device *mc_dev)
 		error = fsl_create_mc_io(&mc_dev->dev,
 					 mc_dev->regions[0].start,
 					 region_size,
-					 NULL, 0, &mc_dev->mc_io);
+					 NULL,
+					 FSL_MC_IO_ATOMIC_CONTEXT_PORTAL,
+					 &mc_dev->mc_io);
 		if (error < 0)
 			return error;
 	}
diff --git a/drivers/staging/fsl-mc/bus/mc-bus.c b/drivers/staging/fsl-mc/bus/mc-bus.c
index 84db55b..d34f1af 100644
--- a/drivers/staging/fsl-mc/bus/mc-bus.c
+++ b/drivers/staging/fsl-mc/bus/mc-bus.c
@@ -702,7 +702,8 @@ static int fsl_mc_bus_probe(struct platform_device *pdev)
 	mc_portal_phys_addr = res.start;
 	mc_portal_size = resource_size(&res);
 	error = fsl_create_mc_io(&pdev->dev, mc_portal_phys_addr,
-				 mc_portal_size, NULL, 0, &mc_io);
+				 mc_portal_size, NULL,
+				 FSL_MC_IO_ATOMIC_CONTEXT_PORTAL, &mc_io);
 	if (error < 0)
 		return error;
 
-- 
2.3.3

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