From aac2e68481681a362ab6f44fc515034e2a4c7f2c Mon Sep 17 00:00:00 2001 From: Christian Krafft Date: Thu, 30 Aug 2007 01:33:53 +0200 Subject: [PATCH] [POWERPC] spu_manage: fix spu_unit_number for celleb device tree This fixes a regression introduced with 2.6.23-rc4 after on some confusion about the device tree interfaces. IBM QS21 device trees provide "physical-id", so we changed the code to run on that and remain compatible with all IBM machines. However, the Toshiba Celleb device tree provides the "unit-id" property, which was in the Linux code, but never used in this way on IBM hardware. Legacy device tree used the reg property for the physical id of an spe. This patch fixes find_spu_unit_number to look for the spu id in that order. The length is checked to avoid misinterpretation in case the attributes unit-id or reg do not contain the id. Signed-off-by: Christian Krafft Signed-off-by: Arnd Bergmann Cc: Jeremy Kerr --- arch/powerpc/platforms/cell/spu_manage.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/arch/powerpc/platforms/cell/spu_manage.c b/arch/powerpc/platforms/cell/spu_manage.c index 7c0668a9dc..0e14f53250 100644 --- a/arch/powerpc/platforms/cell/spu_manage.c +++ b/arch/powerpc/platforms/cell/spu_manage.c @@ -48,10 +48,18 @@ static u64 __init find_spu_unit_number(struct device_node *spe) { const unsigned int *prop; int proplen; + + /* new device trees should provide the physical-id attribute */ prop = of_get_property(spe, "physical-id", &proplen); if (proplen == 4) return (u64)*prop; + /* celleb device tree provides the unit-id */ + prop = of_get_property(spe, "unit-id", &proplen); + if (proplen == 4) + return (u64)*prop; + + /* legacy device trees provide the id in the reg attribute */ prop = of_get_property(spe, "reg", &proplen); if (proplen == 4) return (u64)*prop; -- 2.39.5