From: Zenghui Yu Date: Fri, 5 Jun 2020 05:23:45 +0000 (+0800) Subject: irqchip/gic-v4.1: Use readx_poll_timeout_atomic() to fix sleep in atomic X-Git-Tag: v5.10.7~2184^2^2~2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=31dbb6b1d025506b3b8b8b74e9b697df47b9f696;p=platform%2Fkernel%2Flinux-rpi.git irqchip/gic-v4.1: Use readx_poll_timeout_atomic() to fix sleep in atomic readx_poll_timeout() can sleep if @sleep_us is specified by the caller, and is therefore unsafe to be used inside the atomic context, which is this case when we use it to poll the GICR_VPENDBASER.Dirty bit in irq_set_vcpu_affinity() callback. Let's convert to its atomic version instead which helps to get the v4.1 board back to life! Fixes: 96806229ca03 ("irqchip/gic-v4.1: Add support for VPENDBASER's Dirty+Valid signaling") Signed-off-by: Zenghui Yu Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20200605052345.1494-1-yuzenghui@huawei.com --- diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c index cd685f5..6a5a87f 100644 --- a/drivers/irqchip/irq-gic-v3-its.c +++ b/drivers/irqchip/irq-gic-v3-its.c @@ -3797,10 +3797,10 @@ static void its_wait_vpt_parse_complete(void) if (!gic_rdists->has_vpend_valid_dirty) return; - WARN_ON_ONCE(readq_relaxed_poll_timeout(vlpi_base + GICR_VPENDBASER, - val, - !(val & GICR_VPENDBASER_Dirty), - 10, 500)); + WARN_ON_ONCE(readq_relaxed_poll_timeout_atomic(vlpi_base + GICR_VPENDBASER, + val, + !(val & GICR_VPENDBASER_Dirty), + 10, 500)); } static void its_vpe_schedule(struct its_vpe *vpe)