[PATCH v2 3/3] mmc: davinci: Handle optional IRQ return value correctly

[phucduc.bui at gmail.com]

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

host->sdio_irq is assigned from platform_get_irq_optional(), which
returns a positive IRQ number on success or a negative error code on
failure. Therefore, 0 is not a possible return value from this API.

Check for a positive IRQ number before requesting the SDIO IRQ instead
of treating zero as a valid IRQ.

Signed-off-by: bui duc phuc <phucduc.bui at gmail.com>
---
 drivers/mmc/host/davinci_mmc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mmc/host/davinci_mmc.c b/drivers/mmc/host/davinci_mmc.c
index 773577a10512..c503e5f5c886 100644
--- a/drivers/mmc/host/davinci_mmc.c
+++ b/drivers/mmc/host/davinci_mmc.c
@@ -1303,7 +1303,7 @@ static int davinci_mmcsd_probe(struct platform_device *pdev)
 	if (ret)
 		goto mmc_add_host_fail;
 
-	if (host->sdio_irq >= 0) {
+	if (host->sdio_irq > 0) {
 		ret = devm_request_irq(&pdev->dev, host->sdio_irq,
 				       mmc_davinci_sdio_irq, 0,
 				       mmc_hostname(mmc), host);
-- 
2.43.0