[PATCH v3 3/5] irqchip: gicv3-its: add limitation to page order
From: Marc Zyngier <hidden>
Date: 2015-03-05 11:22:57
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On 04/03/15 03:18, Yun Wu wrote:
quoted hunk ↗ jump to hunk
When required size of Device Table is out of the page allocator's capability, the whole ITS will fail in probing. This actually is not the hardware's problem and is mainly a limitation of the kernel page allocator. This patch will keep ITS going on to the next initializaion stage with an explicit warning. Signed-off-by: Yun Wu <redacted> --- drivers/irqchip/irq-gic-v3-its.c | 5 +++++ 1 file changed, 5 insertions(+)diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c index f5bfa42..e8bda0b 100644 --- a/drivers/irqchip/irq-gic-v3-its.c +++ b/drivers/irqchip/irq-gic-v3-its.c@@ -828,6 +828,11 @@ static int its_alloc_tables(struct its_node *its) u32 ids = GITS_TYPER_DEVBITS(typer); order = get_order((1UL << ids) * entry_size); + if (order >= MAX_ORDER) { + order = MAX_ORDER - 1; + pr_warn("%s: DT size too large, reduce page order to %u\n",
Please spell out device table instead of DT. Most people will interpret DT as Device Tree, and won't immediately get what is happening. Thanks, M. -- Jazz is not dead. It just smells funny...