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authorPaul Mackerras <paulus@samba.org>2005-05-01 19:58:44 +0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-05-01 19:58:44 +0400
commitdc3ec7503e693e05c01d85b664482d0f694429ab (patch)
treec12687ccc2e67affa67a598f89a35f3be4ebaacd /arch
parentbb78cb72201985ae9269b723c82ea0f892048b9e (diff)
downloadlinux-dc3ec7503e693e05c01d85b664482d0f694429ab.tar.xz
[PATCH] ppc64: Fix irq parsing on powermac
When I tried Ben's patches to the powermac sound driver on my G5, I found that it was taking enormous numbers of sound DMA transmit interrupts. This turned out to be because it was incorrectly configured as level-sensitive instead of edge-sensitive, which in turn was because the code that parses the interrupt tree that Open Firmware gives us was incorrectly assigning another device the same irq number as the sound DMA transmit interrupt (i.e. 1). This patch fixes the problem, in a somewhat quick and dirty way for now, but one which will work for all the machines we currently run on. Ultimately Ben and I want to do something more general and robust, but this should go in for 2.6.12. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/ppc64/kernel/prom.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/ppc64/kernel/prom.c b/arch/ppc64/kernel/prom.c
index 45a4ad08fbc2..fe2946c58314 100644
--- a/arch/ppc64/kernel/prom.c
+++ b/arch/ppc64/kernel/prom.c
@@ -321,6 +321,10 @@ static int __devinit finish_node_interrupts(struct device_node *np,
char *name = get_property(ic->parent, "name", NULL);
if (name && !strcmp(name, "u3"))
np->intrs[intrcount].line += 128;
+ else if (!(name && !strcmp(name, "mac-io")))
+ /* ignore other cascaded controllers, such as
+ the k2-sata-root */
+ break;
}
np->intrs[intrcount].sense = 1;
if (n > 1)