linux-kernel - [PATCH 11/14] staging: fsl-mc: add quirk handling for dpseci objects

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Date:	Mon, 11 Apr 2016 11:50:26 -0500
From:	Stuart Yoder <stuart.yoder@....com>
To:	<gregkh@...uxfoundation.org>, <german.rivera@....com>
CC:	<devel@...verdev.osuosl.org>, <linux-kernel@...r.kernel.org>,
	<agraf@...e.de>, <arnd@...db.de>, <leoyang.li@....com>,
	Horia Geanta <horia.geanta@....com>,
	Stuart Yoder <stuart.yoder@....com>
Subject: [PATCH 11/14] staging: fsl-mc: add quirk handling for dpseci objects < 4.0

From: Horia Geanta <horia.geanta@....com>

dpseci objects < 4.0 are not coherent-- in spite of the fact
that the MC reports them to be coherent in certain versions.
Add a special case to set the no shareability flag for dpseci
objects < 4.0.

Signed-off-by: Horia Geanta <horia.geanta@....com>
(Stuart: reworded commit message, updated comment in patch)
Signed-off-by: Stuart Yoder <stuart.yoder@....com>
---
 drivers/staging/fsl-mc/bus/dprc-driver.c |    9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/staging/fsl-mc/bus/dprc-driver.c b/drivers/staging/fsl-mc/bus/dprc-driver.c
index 53c6e98..7fc4717 100644
--- a/drivers/staging/fsl-mc/bus/dprc-driver.c
+++ b/drivers/staging/fsl-mc/bus/dprc-driver.c
@@ -312,6 +312,15 @@ int dprc_scan_objects(struct fsl_mc_device *mc_bus_dev,
 				continue;
 			}
 
+			/*
+			 * add a quirk for all versions of dpsec < 4.0...none
+			 * are coherent regardless of what the MC reports.
+			 */
+			if ((strcmp(obj_desc->type, "dpseci") == 0) &&
+			    (obj_desc->ver_major < 4))
+				obj_desc->flags |=
+					DPRC_OBJ_FLAG_NO_MEM_SHAREABILITY;
+
 			irq_count += obj_desc->irq_count;
 			dev_dbg(&mc_bus_dev->dev,
 				"Discovered object: type %s, id %d\n",
-- 
1.7.9.5