diff options
| author | Michael Ellerman <michael@ellerman.id.au> | 2008-02-08 08:37:02 +0300 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2008-02-08 11:52:39 +0300 |
| commit | ccd05d086f82dba2ab117dcaf4a38cbb2863a439 (patch) | |
| tree | b40ca433d1dafab38f0ec35fae3e672c9e3d36ec /arch/powerpc/platforms/cell/iommu.c | |
| parent | 85687ff2b4eab47f4d637a0d3a482bb955d3cbd4 (diff) | |
| download | linux-ccd05d086f82dba2ab117dcaf4a38cbb2863a439.tar.xz | |
[POWERPC] Fix cell IOMMU null pointer explosion on old firmwares
The cell IOMMU fixed mapping support has a null pointer bug if you run
it on older firmwares that don't contain the "dma-ranges" properties.
Fix it and convert to using of_get_next_parent() while we're there.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/platforms/cell/iommu.c')
| -rw-r--r-- | arch/powerpc/platforms/cell/iommu.c | 15 |
1 files changed, 7 insertions, 8 deletions
diff --git a/arch/powerpc/platforms/cell/iommu.c b/arch/powerpc/platforms/cell/iommu.c index df330666ccc9..a276064471b3 100644 --- a/arch/powerpc/platforms/cell/iommu.c +++ b/arch/powerpc/platforms/cell/iommu.c @@ -26,6 +26,7 @@ #include <linux/init.h> #include <linux/interrupt.h> #include <linux/notifier.h> +#include <linux/of.h> #include <linux/of_platform.h> #include <asm/prom.h> @@ -789,18 +790,16 @@ static int __init cell_iommu_init_disabled(void) static u64 cell_iommu_get_fixed_address(struct device *dev) { u64 cpu_addr, size, best_size, pci_addr = OF_BAD_ADDR; - struct device_node *tmp, *np; + struct device_node *np; const u32 *ranges = NULL; int i, len, best; - np = dev->archdata.of_node; - of_node_get(np); - ranges = of_get_property(np, "dma-ranges", &len); - while (!ranges && np) { - tmp = of_get_parent(np); - of_node_put(np); - np = tmp; + np = of_node_get(dev->archdata.of_node); + while (np) { ranges = of_get_property(np, "dma-ranges", &len); + if (ranges) + break; + np = of_get_next_parent(np); } if (!ranges) { |