6.15-stable review patch. If anyone has any objections, please let me know.
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From: Frank Li Frank.Li@nxp.com
[ Upstream commit 9a958e1fd40d6fae8c66385687a00ebd9575a7d2 ]
platform_device_msi_init_and_alloc_irqs() performs two tasks: allocating the MSI domain for a platform device, and allocate a number of MSIs in that domain.
platform_device_msi_free_irqs_all() only frees the MSIs, and leaves the MSI domain alive.
Given that platform_device_msi_init_and_alloc_irqs() is the sole tool a platform device has to allocate platform MSIs, it makes sense for platform_device_msi_free_irqs_all() to teardown the MSI domain at the same time as the MSIs.
This avoids warnings and unexpected behaviours when a driver repeatedly allocates and frees MSIs.
Signed-off-by: Frank Li Frank.Li@nxp.com Signed-off-by: Thomas Gleixner tglx@linutronix.de Acked-by: Marc Zyngier maz@kernel.org Link: https://lore.kernel.org/all/20250414-ep-msi-v18-1-f69b49917464@nxp.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/base/platform-msi.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/base/platform-msi.c b/drivers/base/platform-msi.c index 0e60dd650b5e0..70db08f3ac6fa 100644 --- a/drivers/base/platform-msi.c +++ b/drivers/base/platform-msi.c @@ -95,5 +95,6 @@ EXPORT_SYMBOL_GPL(platform_device_msi_init_and_alloc_irqs); void platform_device_msi_free_irqs_all(struct device *dev) { msi_domain_free_irqs_all(dev, MSI_DEFAULT_DOMAIN); + msi_remove_device_irq_domain(dev, MSI_DEFAULT_DOMAIN); } EXPORT_SYMBOL_GPL(platform_device_msi_free_irqs_all);