From 827e3648dc2c31e01db7cd2e4498061cf78a97a9 Mon Sep 17 00:00:00 2001 From: Jean-Christophe DUBOIS Date: Fri, 20 Jul 2007 21:39:24 +0200 Subject: [PATCH] [CELL] fix cbe_thermal for legacy SLOF tree. Previous patch changed based on Christian Krafft's comment. On some legacy SLOF tree the generic code is unable to ioremap some Cell BE registers. Therefore the "generic" functions are returning a NULL pointer, triggering a crash on such platforms. Let's handle this more gracefully. Signed-off-by: Jean-Christophe DUBOIS Acked-by: Christian Kraff Signed-off-by: Arnd Bergmann --- arch/powerpc/platforms/cell/cbe_thermal.c | 25 ++++++++++++++++++----- 1 file changed, 20 insertions(+), 5 deletions(-) diff --git a/arch/powerpc/platforms/cell/cbe_thermal.c b/arch/powerpc/platforms/cell/cbe_thermal.c index f370f0fa6f4..e4132f8f51b 100644 --- a/arch/powerpc/platforms/cell/cbe_thermal.c +++ b/arch/powerpc/platforms/cell/cbe_thermal.c @@ -292,7 +292,7 @@ static struct attribute_group ppe_attribute_group = { /* * initialize throttling with default values */ -static void __init init_default_values(void) +static int __init init_default_values(void) { int cpu; struct cbe_pmd_regs __iomem *pmd_regs; @@ -339,25 +339,40 @@ static void __init init_default_values(void) for_each_possible_cpu (cpu) { pr_debug("processing cpu %d\n", cpu); sysdev = get_cpu_sysdev(cpu); + + if (!sysdev) { + pr_info("invalid sysdev pointer for cbe_thermal\n"); + return -EINVAL; + } + pmd_regs = cbe_get_cpu_pmd_regs(sysdev->id); + if (!pmd_regs) { + pr_info("invalid CBE regs pointer for cbe_thermal\n"); + return -EINVAL; + } + out_be64(&pmd_regs->tm_str2, str2); out_be64(&pmd_regs->tm_str1.val, str1.val); out_be64(&pmd_regs->tm_tpr.val, tpr.val); out_be64(&pmd_regs->tm_cr1.val, cr1.val); out_be64(&pmd_regs->tm_cr2, cr2); } + + return 0; } static int __init thermal_init(void) { - init_default_values(); + int rc = init_default_values(); - spu_add_sysdev_attr_group(&spu_attribute_group); - cpu_add_sysdev_attr_group(&ppe_attribute_group); + if (rc == 0) { + spu_add_sysdev_attr_group(&spu_attribute_group); + cpu_add_sysdev_attr_group(&ppe_attribute_group); + } - return 0; + return rc; } module_init(thermal_init); -- 2.20.1