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irqchip/gic-v4.1: Use readx_poll_timeout_atomic() to fix sleep in atomic

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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: 96806229ca ("irqchip/gic-v4.1: Add support for VPENDBASER's Dirty+Valid signaling")
Signed-off-by: Zenghui Yu <yuzenghui@huawei.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200605052345.1494-1-yuzenghui@huawei.com
This commit is contained in:
Zenghui Yu 2020-06-05 13:23:45 +08:00 committed by Marc Zyngier
parent a23df9a4bd
commit 31dbb6b1d0
1 changed files with 4 additions and 4 deletions
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8
drivers/irqchip/irq-gic-v3-its.c
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@ -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)