diff options
| author | Yun Wu <wuyun.wu@huawei.com> | 2015-03-06 16:37:48 +0000 |
|---|---|---|
| committer | Alex Shi <alex.shi@linaro.org> | 2015-11-07 12:45:09 +0800 |
| commit | 502d6efbbdf1d2ddcdf363ef2a66bcee03b327ff (patch) | |
| tree | 3a74596cb6334646cf3e60e3170cc40586203588 | |
| parent | a7e877c51f84644ddf28fb2cf6bdc49bb6500946 (diff) | |
irqchip: gicv3-its: Add limitation to page order
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.
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Yun Wu <wuyun.wu@huawei.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Link: https://lkml.kernel.org/r/1425659870-11832-10-git-send-email-marc.zyngier@arm.com
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
(cherry picked from commit 1d27704a26313b9ed7463d4bfc6eda29e2bb3180)
Signed-off-by: Alex Shi <alex.shi@linaro.org>
| -rw-r--r-- | drivers/irqchip/irq-gic-v3-its.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c index c65c0d4676d7..e413819c3f84 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: Device Table too large, reduce its page order to %u\n", + its->msi_chip.of_node->full_name, order); + } } alloc_size = (1 << order) * PAGE_SIZE; |