From: Benjamin Herrenschmidt Date: Tue, 21 Nov 2006 03:56:37 +0000 (+1100) Subject: [POWERPC] powerpc: Workaround for of_platform without "reg" nor "dcr-reg" X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=9309180f11f0107c9858a61a1ac2b04518a91080;p=deliverable%2Flinux.git [POWERPC] powerpc: Workaround for of_platform without "reg" nor "dcr-reg" Devices with no "reg" nor "dcr-reg" property are given a bus_id which is the node name alone. This means that if more than one such device with the same names are present in the system, sysfs will have collisions when creating the symlinks and will fail registering the devices. This works around that problem by assigning successive numbers to such devices. Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Paul Mackerras --- diff --git a/arch/powerpc/kernel/of_platform.c b/arch/powerpc/kernel/of_platform.c index 6029543c1b5e..b3189d0161b8 100644 --- a/arch/powerpc/kernel/of_platform.c +++ b/arch/powerpc/kernel/of_platform.c @@ -27,6 +27,8 @@ #include #include #include +#include + /* * The list of OF IDs below is used for matching bus types in the @@ -51,6 +53,8 @@ static struct of_device_id of_default_bus_ids[] = { {}, }; +static atomic_t bus_no_reg_magic; + /* * * OF platform device type definition & base infrastructure @@ -165,6 +169,7 @@ static void of_platform_make_bus_id(struct of_device *dev) char *name = dev->dev.bus_id; const u32 *reg; u64 addr; + long magic; /* * If it's a DCR based device, use 'd' for native DCRs @@ -203,9 +208,11 @@ static void of_platform_make_bus_id(struct of_device *dev) } /* - * No BusID, use the node name and pray + * No BusID, use the node name and add a globally incremented + * counter (and pray...) */ - snprintf(name, BUS_ID_SIZE, "%s", node->name); + magic = atomic_add_return(1, &bus_no_reg_magic); + snprintf(name, BUS_ID_SIZE, "%s.%d", node->name, magic - 1); } struct of_device* of_platform_device_create(struct device_node *np,