Iff platform_get_irq() returns 0, ahci_platform_init_host() would return 0
early (as if the call was successful). Override IRQ0 with -EINVAL instead
as the 'libata' regards 0 as "no IRQ" (thus polling) anyway...
Signed-off-by: Sergey Shtylyov <s.shtylyov@xxxxxxxxxxxx>
---
This patch is against the 'master' branch of Jens Axboe's 'linux-block.git'
repo.
drivers/ata/libahci_platform.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
Index: linux-block/drivers/ata/libahci_platform.c
===================================================================
--- linux-block.orig/drivers/ata/libahci_platform.c
+++ linux-block/drivers/ata/libahci_platform.c
@@ -582,11 +582,13 @@ int ahci_platform_init_host(struct platf
int i, irq, n_ports, rc;
irq = platform_get_irq(pdev, 0);
- if (irq <= 0) {
+ if (irq < 0) {
if (irq != -EPROBE_DEFER)
dev_err(dev, "no irq\n");
return irq;
}
+ if (!irq)
+ return -EINVAL;
hpriv->irq = irq;
