[PATCH 3/4] ipmi: bt-bmc: Request IRQ only when available

[phucduc.bui@gmail.com]

From: bui duc phuc <phucduc.bui@gmail.com>

Only call devm_request_irq() when a valid positive IRQ number is
available.

Remove the redundant warning since devm_request_irq() already reports
the error. There is also no need to store the error in bt_bmc->irq,
as errors other than -ENXIO are returned to the caller instead of
being handled as the no-IRQ case.

Signed-off-by: bui duc phuc <phucduc.bui@gmail.com>
---
 drivers/char/ipmi/bt-bmc.c | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/drivers/char/ipmi/bt-bmc.c b/drivers/char/ipmi/bt-bmc.c
index 4c5457c88503..99b38300f9e1 100644
--- a/drivers/char/ipmi/bt-bmc.c
+++ b/drivers/char/ipmi/bt-bmc.c
@@ -383,12 +383,11 @@ static int bt_bmc_config_irq(struct bt_bmc *bt_bmc,
 	if (bt_bmc->irq < 0 && bt_bmc->irq != -ENXIO)
 		return bt_bmc->irq;
 
-	rc = devm_request_irq(dev, bt_bmc->irq, bt_bmc_irq, IRQF_SHARED,
-			      DEVICE_NAME, bt_bmc);
-	if (rc < 0) {
-		dev_warn(dev, "Unable to request IRQ %d\n", bt_bmc->irq);
-		bt_bmc->irq = rc;
-		return rc;
+	if (bt_bmc->irq > 0) {
+		rc = devm_request_irq(dev, bt_bmc->irq, bt_bmc_irq,
+				      IRQF_SHARED, DEVICE_NAME, bt_bmc);
+		if (rc < 0)
+			return rc;
 	}
 
 	/*
-- 
2.43.0