genirq/msi: Provide msi_domain_alloc/free_irqs_descs_locked()

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Usage sites which do allocations of the MSI descriptors before invoking
msi_domain_alloc_irqs() require to lock the MSI decriptors accross the
operation.

Provide entry points which can be called with the MSI mutex held and lock
the mutex in the existing entry points.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Michael Kelley <mikelley@microsoft.com>
Tested-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20211206210747.765371053@linutronix.de

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Thomas Gleixner 2021-12-06 23:51:07 +01:00

parent b5f687f97d

commit 0f62d941ac

2 changed files with 61 additions and 16 deletions

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3

include/linux/msi.h

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94

kernel/irq/msi.c

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