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genirq/msi: Populate sysfs entry only once 

The MSI entries for multi-MSI are populated en bloc for the MSI descriptor,
but the current code invokes the population inside the per interrupt loop
which triggers a warning in the sysfs code and causes the interrupt
allocation to fail.

Move it outside of the loop so it works correctly for single and multi-MSI.

Fixes: bf5e758f02 ("genirq/msi: Simplify sysfs handling")
Reported-by: Borislav Petkov <bp@alien8.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Borislav Petkov <bp@suse.de>
Link: https://lore.kernel.org/r/87leznqx2a.ffs@tglx
This commit is contained in:
Thomas Gleixner 2022-01-10 19:12:45 +01:00
parent d558285413
commit 74a5257a0c
1 changed files with 5 additions and 6 deletions
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11
kernel/irq/msi.c
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@ -887,12 +887,11 @@ int __msi_domain_alloc_irqs(struct irq_domain *domain, struct device *dev,
ret = msi_init_virq(domain, virq + i, vflags);
if (ret)
return ret;
if (info->flags & MSI_FLAG_DEV_SYSFS) {
ret = msi_sysfs_populate_desc(dev, desc);
if (ret)
return ret;
}
}
if (info->flags & MSI_FLAG_DEV_SYSFS) {
ret = msi_sysfs_populate_desc(dev, desc);
if (ret)
return ret;
}
allocated++;
}