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iommu/amd: Return proper error code in irq_remapping_alloc()

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In the unlikely case when alloc_irq_table() is not able to return a
remap table then "ret" will be assigned with an error code. Later, the
code checks `index' and if it is negative (which it is because it is
initialized with `-1') and then then function properly aborts but
returns `-1' instead `-ENOMEM' what was intended.
In order to correct this, I assign -ENOMEM to index.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Sebastian Andrzej Siewior 2018-03-22 16:22:42 +01:00 committed by Joerg Roedel
parent 2cd1083d79
commit 29d049be94
1 changed files with 2 additions and 2 deletions
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4
drivers/iommu/amd_iommu.c
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@ -4124,7 +4124,7 @@ static int irq_remapping_alloc(struct irq_domain *domain, unsigned int virq,
struct amd_ir_data *data = NULL;
struct irq_cfg *cfg;
int i, ret, devid;
int index = -1;
int index;
if (!info)
return -EINVAL;
@ -4166,7 +4166,7 @@ static int irq_remapping_alloc(struct irq_domain *domain, unsigned int virq,
WARN_ON(table->min_index != 32);
index = info->ioapic_pin;
} else {
ret = -ENOMEM;
index = -ENOMEM;
}
} else {
bool align = (info->type == X86_IRQ_ALLOC_TYPE_MSI);