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genirq/chip: Rework irq_set_msi_desc_off()

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Use the new guards to get and lock the interrupt descriptor and tidy up the
code.

Fixup the kernel doc comment while at it.

No functional change.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/all/20250429065421.473563978@linutronix.de
This commit is contained in:
Thomas Gleixner 2025-04-29 08:55:23 +02:00
parent 321a0fdf13
commit c836e5a70c
1 changed files with 17 additions and 21 deletions
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38
kernel/irq/chip.c
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@ -84,34 +84,30 @@ int irq_set_handler_data(unsigned int irq, void *data)
EXPORT_SYMBOL(irq_set_handler_data);
/**
* irq_set_msi_desc_off - set MSI descriptor data for an irq at offset
* @irq_base: Interrupt number base
* @irq_offset: Interrupt number offset
* @entry: Pointer to MSI descriptor data
* irq_set_msi_desc_off - set MSI descriptor data for an irq at offset
* @irq_base: Interrupt number base
* @irq_offset: Interrupt number offset
* @entry: Pointer to MSI descriptor data
*
* Set the MSI descriptor entry for an irq at offset
* Set the MSI descriptor entry for an irq at offset
*/
int irq_set_msi_desc_off(unsigned int irq_base, unsigned int irq_offset,
struct msi_desc *entry)
int irq_set_msi_desc_off(unsigned int irq_base, unsigned int irq_offset, struct msi_desc *entry)
{
unsigned long flags;
struct irq_desc *desc = irq_get_desc_lock(irq_base + irq_offset, &flags, IRQ_GET_DESC_CHECK_GLOBAL);
if (!desc)
return -EINVAL;
desc->irq_common_data.msi_desc = entry;
if (entry && !irq_offset)
entry->irq = irq_base;
irq_put_desc_unlock(desc, flags);
return 0;
scoped_irqdesc_get_and_lock(irq_base + irq_offset, IRQ_GET_DESC_CHECK_GLOBAL) {
scoped_irqdesc->irq_common_data.msi_desc = entry;
if (entry && !irq_offset)
entry->irq = irq_base;
return 0;
}
return -EINVAL;
}
/**
* irq_set_msi_desc - set MSI descriptor data for an irq
* @irq: Interrupt number
* @entry: Pointer to MSI descriptor data
* irq_set_msi_desc - set MSI descriptor data for an irq
* @irq: Interrupt number
* @entry: Pointer to MSI descriptor data
*
* Set the MSI descriptor entry for an irq
* Set the MSI descriptor entry for an irq
*/
int irq_set_msi_desc(unsigned int irq, struct msi_desc *entry)
{