Messages in this thread Patch in this message |  | | From | Yun Wu <> | Subject | [PATCH v2 3/6] irqchip: gicv3-its: limit order of DT size to MAX_ORDER | Date | Sun, 15 Feb 2015 17:32:00 +0800 |
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When required DT size is out of the kmalloc()'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 memory allocator. This patch will keep ITS going on to the next initializaion step with an explicit warning.
Signed-off-by: Yun Wu <wuyun.wu@huawei.com> --- drivers/irqchip/irq-gic-v3-its.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c index f5bfa42..de36606 100644 --- a/drivers/irqchip/irq-gic-v3-its.c +++ b/drivers/irqchip/irq-gic-v3-its.c @@ -828,6 +828,12 @@ 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) { + pr_warn("%s: DT size too large, reduce to %u pages\n", + its->msi_chip.of_node->full_name, + 1 << order); + order = MAX_ORDER; + } }
alloc_size = (1 << order) * PAGE_SIZE; -- 1.8.0
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