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rapidio: fix potential NULL pointer dereference 

The change fixes improper check for a returned error value by
class_create() function, which on error returns ERR_PTR() value, thus the
original check always results in a dead code on error path.

Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Vladimir Zapolskiy 2016-04-28 16:19:06 -07:00 committed by Linus Torvalds
parent c2e7e00b71
commit 99f23c2cde
1 changed files with 2 additions and 2 deletions
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4
drivers/rapidio/devices/rio_mport_cdev.c
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@ -2669,9 +2669,9 @@ static int __init mport_init(void)
/* Create device class needed by udev */
dev_class = class_create(THIS_MODULE, DRV_NAME);
if (!dev_class) {
if (IS_ERR(dev_class)) {
rmcd_error("Unable to create " DRV_NAME " class");
return -EINVAL;
return PTR_ERR(dev_class);
}
ret = alloc_chrdev_region(&dev_number, 0, RIO_MAX_MPORTS, DRV_NAME);