[PATCHv2] ata: sata_mv: Use platform_get_irq() to get interrupt

[Rosen Penev <rosenp@gmail.com>]

Extract platform_get_irq() out of the conditional block to run it
unconditionally, replacing the direct use of irq_of_parse_and_map()
for DT-based systems. This simplifies the probe logic and avoids the
need for irq_dispose_mapping.

Remove dead branch for platform_get_irq(). It intercepts 0 and returns
-EINVAL, which goes to the first one.

Assisted-by: Antigravity:Gemini-3.5-Flash
Signed-off-by: Rosen Penev <rosenp@gmail.com>
---
 v2: remove dead branch
 drivers/ata/sata_mv.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c
index 41647a56a9f4..a2bf9551a600 100644
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -4054,17 +4054,13 @@ static int mv_platform_probe(struct platform_device *pdev)
 				n_ports);
 			return -EINVAL;
 		}
-
-		irq = irq_of_parse_and_map(pdev->dev.of_node, 0);
 	} else {
 		mv_platform_data = dev_get_platdata(&pdev->dev);
 		n_ports = mv_platform_data->n_ports;
-		irq = platform_get_irq(pdev, 0);
 	}
+	irq = platform_get_irq(pdev, 0);
 	if (irq < 0)
 		return irq;
-	if (!irq)
-		return -EINVAL;
 
 	host = ata_host_alloc_pinfo(&pdev->dev, ppi, n_ports);
 	hpriv = devm_kzalloc(&pdev->dev, sizeof(*hpriv), GFP_KERNEL);
-- 
2.55.0