[PATCH] irqchip: gic: Don't complain ingic_get_cpumask() if UP system
From: stefan@agner.ch (Stefan Agner)
Date: 2015-02-01 21:26:21
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On 2015-01-31 01:43, Stephen Boyd wrote:
In a uniprocessor implementation the interrupt processor targets registers are read-as-zero/write-ignored (RAZ/WI). Unfortunately gic_get_cpumask() will print a critical message saying GIC CPU mask not found - kernel will fail to boot. if these registers all read as zero, but there won't actually be a problem on uniprocessor systems and the kernel will boot just fine. Skip this check if we're running a UP kernel or if we detect that the hardware only supports a single processor.
Does the job for my device too, thx. Acked-by: Stefan Agner <stefan@agner.ch>
quoted hunk ↗ jump to hunk
Acked-by: Nicolas Pitre <redacted> Cc: Russell King <redacted> Cc: Stefan Agner <stefan@agner.ch> Signed-off-by: Stephen Boyd <redacted> --- drivers/irqchip/irq-gic.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)diff --git a/drivers/irqchip/irq-gic.c b/drivers/irqchip/irq-gic.c index d617ee5a3d8a..1b70e0de0f6e 100644 --- a/drivers/irqchip/irq-gic.c +++ b/drivers/irqchip/irq-gic.c@@ -346,7 +346,7 @@ static u8 gic_get_cpumask(struct gic_chip_data *gic) break; } - if (!mask) + if (!mask && num_possible_cpus() > 1) pr_crit("GIC CPU mask not found - kernel will fail to boot.\n"); return mask;