diff options
| author | David S. Miller | 2008-09-03 11:04:41 +0200 |
|---|---|---|
| committer | David S. Miller | 2008-09-03 11:05:19 +0200 |
| commit | 5280267c1dddb8d413595b87dc406624bb497946 (patch) | |
| tree | 541701a1c15d17b7b5535beebd8e4f258d31395c | |
| parent | sparc32: Fix sun4c build warnings. (diff) | |
| download | kernel-qcow2-linux-5280267c1dddb8d413595b87dc406624bb497946.tar.gz kernel-qcow2-linux-5280267c1dddb8d413595b87dc406624bb497946.tar.xz kernel-qcow2-linux-5280267c1dddb8d413595b87dc406624bb497946.zip | |
sparc: Fix handling of LANCE and ESP parent nodes in of_device.c
The device nodes that sit above 'esp' and 'le' on SBUS lack a 'ranges'
property, but we should pass the translation up to the parent node so
that the SBUS level ranges get applied.
Based upon a bug report from Robert Reif.
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | arch/sparc/kernel/of_device.c | 26 | ||||
| -rw-r--r-- | arch/sparc64/kernel/of_device.c | 11 |
2 files changed, 32 insertions, 5 deletions
diff --git a/arch/sparc/kernel/of_device.c b/arch/sparc/kernel/of_device.c index c59014886afe..4ef160755881 100644 --- a/arch/sparc/kernel/of_device.c +++ b/arch/sparc/kernel/of_device.c @@ -344,6 +344,27 @@ static int __init build_one_resource(struct device_node *parent, return 1; } +static int __init use_1to1_mapping(struct device_node *pp) +{ + /* If we have a ranges property in the parent, use it. */ + if (of_find_property(pp, "ranges", NULL) != NULL) + return 0; + + /* Some SBUS devices use intermediate nodes to express + * hierarchy within the device itself. These aren't + * real bus nodes, and don't have a 'ranges' property. + * But, we should still pass the translation work up + * to the SBUS itself. + */ + if (!strcmp(pp->name, "dma") || + !strcmp(pp->name, "espdma") || + !strcmp(pp->name, "ledma") || + !strcmp(pp->name, "lebuffer")) + return 0; + + return 1; +} + static int of_resource_verbose; static void __init build_device_resources(struct of_device *op, @@ -389,10 +410,7 @@ static void __init build_device_resources(struct of_device *op, memcpy(addr, reg, na * 4); - /* If the immediate parent has no ranges property to apply, - * just use a 1<->1 mapping. - */ - if (of_find_property(pp, "ranges", NULL) == NULL) { + if (use_1to1_mapping(pp)) { result = of_read_addr(addr, na); goto build_res; } diff --git a/arch/sparc64/kernel/of_device.c b/arch/sparc64/kernel/of_device.c index e427086e3b58..c15bcdf75c0d 100644 --- a/arch/sparc64/kernel/of_device.c +++ b/arch/sparc64/kernel/of_device.c @@ -438,8 +438,17 @@ static int __init use_1to1_mapping(struct device_node *pp) /* If the parent is the dma node of an ISA bus, pass * the translation up to the root. + * + * Some SBUS devices use intermediate nodes to express + * hierarchy within the device itself. These aren't + * real bus nodes, and don't have a 'ranges' property. + * But, we should still pass the translation work up + * to the SBUS itself. */ - if (!strcmp(pp->name, "dma")) + if (!strcmp(pp->name, "dma") || + !strcmp(pp->name, "espdma") || + !strcmp(pp->name, "ledma") || + !strcmp(pp->name, "lebuffer")) return 0; /* Similarly for all PCI bridges, if we get this far |