From: Itai Katz <itai.katz@xxxxxxx>
The dpmcp driver supports dpmcp version 3.0 and above.
This patch adds the code to check the version.
Signed-off-by: Itai Katz <itai.katz@xxxxxxx>
Signed-off-by: Stuart Yoder <stuart.yoder@xxxxxxx>
---
drivers/staging/fsl-mc/bus/dpmcp-cmd.h | 6 +++---
drivers/staging/fsl-mc/bus/mc-allocator.c | 11 +++++++++++
2 files changed, 14 insertions(+), 3 deletions(-)
diff --git a/drivers/staging/fsl-mc/bus/dpmcp-cmd.h b/drivers/staging/fsl-mc/bus/dpmcp-cmd.h
index c6f4ec0..c9b52dd 100644
--- a/drivers/staging/fsl-mc/bus/dpmcp-cmd.h
+++ b/drivers/staging/fsl-mc/bus/dpmcp-cmd.h
@@ -32,9 +32,9 @@
#ifndef _FSL_DPMCP_CMD_H
#define _FSL_DPMCP_CMD_H
-/* DPMCP Version */
-#define DPMCP_VER_MAJOR 3
-#define DPMCP_VER_MINOR 0
+/* Minimal supported DPMCP Version */
+#define DPMCP_MIN_VER_MAJOR 3
+#define DPMCP_MIN_VER_MINOR 0
/* Command IDs */
#define DPMCP_CMDID_CLOSE 0x800
diff --git a/drivers/staging/fsl-mc/bus/mc-allocator.c b/drivers/staging/fsl-mc/bus/mc-allocator.c
index 52b16f7..4676ba1 100644
--- a/drivers/staging/fsl-mc/bus/mc-allocator.c
+++ b/drivers/staging/fsl-mc/bus/mc-allocator.c
@@ -310,6 +310,17 @@ int __must_check fsl_mc_portal_allocate(struct fsl_mc_device *mc_dev,
if (WARN_ON(!dpmcp_dev))
goto error_cleanup_resource;
+ if (dpmcp_dev->obj_desc.ver_major < DPMCP_MIN_VER_MAJOR ||
+ (dpmcp_dev->obj_desc.ver_major == DPMCP_MIN_VER_MAJOR &&
+ dpmcp_dev->obj_desc.ver_minor < DPMCP_MIN_VER_MINOR)) {
+ dev_err(&dpmcp_dev->dev,
+ "ERROR: Version %d.%d of DPMCP not supported.\n",
+ dpmcp_dev->obj_desc.ver_major,
+ dpmcp_dev->obj_desc.ver_minor);
+ error = -ENOTSUPP;
+ goto error_cleanup_resource;
+ }
+
if (WARN_ON(dpmcp_dev->obj_desc.region_count == 0))
goto error_cleanup_resource;
--
1.7.9.5
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