genirq/msi: Fix off-by-one error in msi_domain_alloc()

The error path in msi_domain_alloc(), frees the already allocated MSI
interrupts in a loop, but the loop condition terminates when the index
reaches zero, which fails to free the first allocated MSI interrupt at
index zero.

Check for >= 0 so that msi[0] is freed as well.

Fixes: f3cf8bb ("genirq: Add generic msi irq domain support")
Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20241026063639.10711-1-ruanjinjie@huawei.com

Author: Jinjie Ruan

kernel/irq/msi.c

@@ -718,7 +718,7 @@ static int msi_domain_alloc(struct irq_domain *domain, unsigned int virq,
 		ret = ops->msi_init(domain, info, virq + i, hwirq + i, arg);
 		if (ret < 0) {
 			if (ops->msi_free) {
-				for (i--; i > 0; i--)
+				for (i--; i >= 0; i--)
 					ops->msi_free(domain, info, virq + i);
 			}
 			irq_domain_free_irqs_top(domain, virq, nr_irqs);