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sparc: Fix handling of LANCE and ESP parent nodes in of_device.c

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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>
This commit is contained in:
David S. Miller 2008-09-03 02:04:41 -07:00
parent 9723f38eb5
commit 5280267c1d
2 changed files with 32 additions and 5 deletions
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26
arch/sparc/kernel/of_device.c
View File

@ -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;
}

11
arch/sparc64/kernel/of_device.c
View File

@ -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