From: Geordan Neukum Date: Sun, 26 May 2019 01:18:32 +0000 (+0000) Subject: staging: kpc2000: kpc_i2c: fail probe if unable to get I/O resource X-Git-Tag: v5.4-rc1~602^2~377 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=4ff740315aee92ec19add0193cef976e532e34dc;p=platform%2Fkernel%2Flinux-rpi.git staging: kpc2000: kpc_i2c: fail probe if unable to get I/O resource The kpc_i2c driver attempts to map its I/O space without verifying whether or not the result of platform_get_resource() is NULL. Make the driver check that platform_get_resource did not return NULL before attempting to use the value returned to map an I/O space. Signed-off-by: Geordan Neukum Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/kpc2000/kpc2000_i2c.c b/drivers/staging/kpc2000/kpc2000_i2c.c index e4bbb91..452052b 100644 --- a/drivers/staging/kpc2000/kpc2000_i2c.c +++ b/drivers/staging/kpc2000/kpc2000_i2c.c @@ -587,6 +587,9 @@ static int pi2c_probe(struct platform_device *pldev) priv->adapter.algo = &smbus_algorithm; res = platform_get_resource(pldev, IORESOURCE_MEM, 0); + if (!res) + return -ENXIO; + priv->smba = (unsigned long)ioremap_nocache(res->start, resource_size(res)); platform_set_drvdata(pldev, priv);