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/openbmc/linux/drivers/irqchip/ |
H A D | irq-gic-v3-its.c | 31dbb6b1 Fri Jun 05 00:23:45 CDT 2020 Zenghui Yu <yuzenghui@huawei.com> 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 <yuzenghui@huawei.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20200605052345.1494-1-yuzenghui@huawei.com 31dbb6b1 Fri Jun 05 00:23:45 CDT 2020 Zenghui Yu <yuzenghui@huawei.com> 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 <yuzenghui@huawei.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20200605052345.1494-1-yuzenghui@huawei.com
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