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staging: kpc2000: kpc_i2c: fail probe if unable to get I/O resource

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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 <gneukum1@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Geordan Neukum 2019-05-26 01:18:32 +00:00 • committed by Greg Kroah-Hartman
commit 4ff740315a
1 changed files with 3 additions and 0 deletions
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drivers/staging/kpc2000/kpc2000_i2c.c
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@ -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);