[PATCH] ARM: omap2: simplify allocation for omap_device

[Rosen Penev <rosenp@gmail.com>]

Use a flexible array member to combine allocations.

Add __counted_by for extra runtime analysis.

Remove goto paths as they are not really needed anymore.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
---
 arch/arm/mach-omap2/omap_device.c | 21 ++++++---------------
 arch/arm/mach-omap2/omap_device.h |  2 +-
 2 files changed, 7 insertions(+), 16 deletions(-)

diff --git a/arch/arm/mach-omap2/omap_device.c b/arch/arm/mach-omap2/omap_device.c
index 79db4c49ffc9..55f2a9d5f4df 100644
--- a/arch/arm/mach-omap2/omap_device.c
+++ b/arch/arm/mach-omap2/omap_device.c
@@ -309,17 +309,15 @@ static struct omap_device *omap_device_alloc(struct platform_device *pdev,
 	int i;
 	struct omap_hwmod **hwmods;
 
-	od = kzalloc_obj(struct omap_device);
-	if (!od)
-		goto oda_exit1;
+	od = kzalloc_flex(*od, hwmods, oh_cnt);
+	if (!od) {
+		dev_err(&pdev->dev, "omap_device: build failed (%d)\n", ret);
+		return ERR_PTR(ret);
+	}
 
 	od->hwmods_cnt = oh_cnt;
+	memcpy(od->hwmods, ohs, oh_cnt * sizeof(*od->hwmods));
 
-	hwmods = kmemdup_array(ohs, oh_cnt, sizeof(*hwmods), GFP_KERNEL);
-	if (!hwmods)
-		goto oda_exit2;
-
-	od->hwmods = hwmods;
 	od->pdev = pdev;
 	pdev->archdata.od = od;
 
@@ -329,13 +327,6 @@ static struct omap_device *omap_device_alloc(struct platform_device *pdev,
 	}
 
 	return od;
-
-oda_exit2:
-	kfree(od);
-oda_exit1:
-	dev_err(&pdev->dev, "omap_device: build failed (%d)\n", ret);
-
-	return ERR_PTR(ret);
 }
 
 static void omap_device_delete(struct omap_device *od)
diff --git a/arch/arm/mach-omap2/omap_device.h b/arch/arm/mach-omap2/omap_device.h
index aa8096ecb23c..9283c15c2403 100644
--- a/arch/arm/mach-omap2/omap_device.h
+++ b/arch/arm/mach-omap2/omap_device.h
@@ -51,11 +51,11 @@
  */
 struct omap_device {
 	struct platform_device		*pdev;
-	struct omap_hwmod		**hwmods;
 	unsigned long			_driver_status;
 	u8				hwmods_cnt;
 	u8				_state;
 	u8                              flags;
+	struct omap_hwmod		*hwmods[] __counted_by(hwmods_cnt);
 };
 
 /* Device driver interface (call via platform_data fn ptrs) */
-- 
2.53.0