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| author |   Thomas Gleixner <tglx@linutronix.de> | 2023-03-01 22:07:48 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2023-03-02 18:09:44 +0100 |
| commit | 0fb7fb713461e44b12e72c292bf90ee300f40710 (patch) | |
| tree | c364709b031a5b505f42b011d239d71926f02ce7 /include/linux/msi.h | |
| parent | genirq/msi: Drop dead domain name assignment (diff) | |
| download | wireguard-linux-0fb7fb713461e44b12e72c292bf90ee300f40710.tar.xz wireguard-linux-0fb7fb713461e44b12e72c292bf90ee300f40710.zip | |
genirq/msi, platform-msi: Ensure that MSI descriptors are unreferenced
Miquel reported a warning in the MSI core which is triggered when
interrupts are freed via platform_msi_device_domain_free().
This code got reworked to use core functions for freeing the MSI
descriptors, but nothing took care to clear the msi_desc->irq entry, which
then triggers the warning in msi_free_msi_desc() which uses desc->irq to
validate that the descriptor has been torn down. The same issue exists in
msi_domain_populate_irqs().
Up to the point that msi_free_msi_descs() grew a warning for this case,
this went un-noticed.
Provide the counterpart of msi_domain_populate_irqs() and invoke it in
platform_msi_device_domain_free() before freeing the interrupts and MSI
descriptors and also in the error path of msi_domain_populate_irqs().
Fixes: 2f2940d16823 ("genirq/msi: Remove filter from msi_free_descs_free_range()")
Reported-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Miquel Raynal <miquel.raynal@bootlin.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/87mt4wkwnv.ffs@tglx
Diffstat (limited to 'include/linux/msi.h')
| -rw-r--r-- | include/linux/msi.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/msi.h b/include/linux/msi.h index a112b913fff9..15dd71817996 100644 --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -631,6 +631,8 @@ int msi_domain_prepare_irqs(struct irq_domain *domain, struct device *dev, int nvec, msi_alloc_info_t *args); int msi_domain_populate_irqs(struct irq_domain *domain, struct device *dev, int virq, int nvec, msi_alloc_info_t *args); +void msi_domain_depopulate_descs(struct device *dev, int virq, int nvec); + struct irq_domain * __platform_msi_create_device_domain(struct device *dev, unsigned int nvec, |