[PATCH] ARM: at91: pm: fix SRAM allocation

[Alexandre Belloni]

On some platforms, there are multiple SRAM nodes defined in the device tree but
some of them are disabled, leading to allocation failure. Try to find the first
enabled SRAM node and allocate from it.

Signed-off-by: Alexandre Belloni <alexandre.belloni at free-electrons.com>
---
 arch/arm/mach-at91/pm.c | 20 +++++++++-----------
 1 file changed, 9 insertions(+), 11 deletions(-)

diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c
index 5e34fb143309..97cc529b6fa0 100644
--- a/arch/arm/mach-at91/pm.c
+++ b/arch/arm/mach-at91/pm.c
@@ -272,35 +272,33 @@ static void __init at91_pm_sram_init(void)
 	struct device_node *node;
 	struct platform_device *pdev;
 
-	node = of_find_compatible_node(NULL, NULL, "mmio-sram");
-	if (!node) {
-		pr_warn("%s: failed to find sram node!\n", __func__);
-		return;
+	for_each_compatible_node(node, NULL, "mmio-sram") {
+		pdev = of_find_device_by_node(node);
+		if (pdev) {
+			of_node_put(node);
+			break;
+		}
 	}
 
-	pdev = of_find_device_by_node(node);
 	if (!pdev) {
 		pr_warn("%s: failed to find sram device!\n", __func__);
-		goto put_node;
+		return;
 	}
 
 	sram_pool = dev_get_gen_pool(&pdev->dev);
 	if (!sram_pool) {
 		pr_warn("%s: sram pool unavailable!\n", __func__);
-		goto put_node;
+		return;
 	}
 
 	sram_base = gen_pool_alloc(sram_pool, at91_slow_clock_sz);
 	if (!sram_base) {
 		pr_warn("%s: unable to alloc ocram!\n", __func__);
-		goto put_node;
+		return;
 	}
 
 	sram_pbase = gen_pool_virt_to_phys(sram_pool, sram_base);
 	slow_clock = __arm_ioremap_exec(sram_pbase, at91_slow_clock_sz, false);
-
-put_node:
-	of_node_put(node);
 }
 #endif
 
-- 
2.1.0