From 3956a1a0d1e072c321fcf1b1136e35a22be12af5 Mon Sep 17 00:00:00 2001 From: Peter Ujfalusi Date: Thu, 23 Aug 2012 16:54:09 +0300 Subject: [PATCH] ARM: OMAP: omap_device: Fix up resource names when booted with devicetree When booted with some resource will have their name set to NULL. This can cause later kernel crash since this is not expected by the platform code. When we boot without DT the devices are created with platform_device_add() which itself fixes up the missing resource names: if (r->name == NULL) r->name = dev_name(&pdev->dev); The of core also fixes up the resource names when taking the information from DT data - in __of_address_to_resource(): r->name = name ? name : dev->full_name; When we boot OMAP with devicetree: of will create the devices based on the DT data so the resource names are guarantied to be not NULL. Since we have the 'ti,hwmod' tag, we remove the of created resources from the device and re-create them based on hwmod data. If the hwmod data does not specify a name for a resource it will be NULL. This can cause kernel crash if the driver uses platform_get_resource_byname() to get any resource. Signed-off-by: Peter Ujfalusi [b-cousson@ti.com: Change omap_hwmod to omap_device in subject] Signed-off-by: Benoit Cousson --- arch/arm/plat-omap/omap_device.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/arch/arm/plat-omap/omap_device.c b/arch/arm/plat-omap/omap_device.c index c490240..ff57b5a 100644 --- a/arch/arm/plat-omap/omap_device.c +++ b/arch/arm/plat-omap/omap_device.c @@ -370,6 +370,14 @@ static int omap_device_build_from_dt(struct platform_device *pdev) goto odbfd_exit1; } + /* Fix up missing resource names */ + for (i = 0; i < pdev->num_resources; i++) { + struct resource *r = &pdev->resource[i]; + + if (r->name == NULL) + r->name = dev_name(&pdev->dev); + } + if (of_get_property(node, "ti,no_idle_on_suspend", NULL)) omap_device_disable_idle_on_suspend(pdev); -- 2.7.4