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SubjectRe: [PATCH v3 3/5] irqchip: gicv3-its: add limitation to page order
On 04/03/15 03:18, Yun Wu wrote:
> 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 <wuyun.wu@huawei.com>
> ---
> 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...


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