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 <[email protected]> --- drivers/iommu/amd_iommu.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index 23e26a4b708e..6107e24bed8a 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -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); -- 2.16.2
