Nuno Das Neves c3bb76822c x86/hyperv: Fix usage of cpu_online_mask to get valid cpu ...

[ Upstream commit bb169f80ed ]

Accessing cpu_online_mask here is problematic because the cpus read lock
is not held in this context.

However, cpu_online_mask isn't needed here since the effective affinity
mask is guaranteed to be valid in this callback. So, just use
cpumask_first() to get the cpu instead of ANDing it with cpus_online_mask
unnecessarily.

Fixes: e39397d1fd ("x86/hyperv: implement an MSI domain for root partition")
Reported-by: Michael Kelley <mhklinux@outlook.com>
Closes: https://lore.kernel.org/linux-hyperv/SN6PR02MB4157639630F8AD2D8FD8F52FD475A@SN6PR02MB4157.namprd02.prod.outlook.com/
Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Nuno Das Neves <nunodasneves@linux.microsoft.com>
Reviewed-by: Michael Kelley <mhklinux@outlook.com>
Link: https://lore.kernel.org/r/1751582677-30930-4-git-send-email-nunodasneves@linux.microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Message-ID: <1751582677-30930-4-git-send-email-nunodasneves@linux.microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2025-08-15 12:04:46 +02:00

..

hv_apic.c

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hv_init.c

x86/hyperv: Fix the detection of E820_TYPE_PRAM in a Gen2 VM

2023-12-20 17:00:21 +01:00

hv_proc.c

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hv_spinlock.c

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irqdomain.c

x86/hyperv: Fix usage of cpu_online_mask to get valid cpu

2025-08-15 12:04:46 +02:00

ivm.c

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Makefile

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mmu.c

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nested.c

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