i2c: xlp9xx: fix main IRQ check

BugLink: https://bugs.launchpad.net/bugs/1946788
[ Upstream commit 661e8a88e8317eb9ffe69c69d6cb4876370fe7e2 ]

Iff platform_get_irq() returns 0 for the main IRQ, the driver's probe()
method will return 0 early (as if the method's call was successful).
Let's consider IRQ0 valid for simplicity -- devm_request_irq() can always
override that decision...

Fixes: 2bbd681ba2b ("i2c: xlp9xx: Driver for Netlogic XLP9XX/5XX I2C controller")
Signed-off-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Reviewed-by: George Cherian <george.cherian@marvell.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Kelsey Skunberg <kelsey.skunberg@canonical.com>

diff --git a/drivers/i2c/busses/i2c-xlp9xx.c b/drivers/i2c/busses/i2c-xlp9xx.c
index f2241cedf5d3ffa21b11152bd97d2f94993153c6..6d24dc3855229e571f021dda50c15ee4ffc2112d 100644 (file)
--- a/drivers/i2c/busses/i2c-xlp9xx.c
+++ b/drivers/i2c/busses/i2c-xlp9xx.c
@@ -517,7 +517,7 @@ static int xlp9xx_i2c_probe(struct platform_device *pdev)
                return PTR_ERR(priv->base);
 
        priv->irq = platform_get_irq(pdev, 0);
-       if (priv->irq <= 0)
+       if (priv->irq < 0)
                return priv->irq;
        /* SMBAlert irq */
        priv->alert_data.irq = platform_get_irq(pdev, 1);