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MIPS: vpe-mt: fix possible memory leak while module exiting 

[ Upstream commit 5822e8cc84 ]

Afer commit 1fa5ae857b ("driver core: get rid of struct device's
bus_id string array"), the name of device is allocated dynamically,
it need be freed when module exiting, call put_device() to give up
reference, so that it can be freed in kobject_cleanup() when the
refcount hit to 0. The vpe_device is static, so remove kfree() from
vpe_device_release().

Fixes: 1fa5ae857b ("driver core: get rid of struct device's bus_id string array")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Yang Yingliang 2022-11-04 11:39:44 +08:00 committed by Greg Kroah-Hartman
parent 205f5e984d
commit ab3d47c1fd
1 changed files with 2 additions and 2 deletions
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4
arch/mips/kernel/vpe-mt.c
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@ -313,7 +313,6 @@ ATTRIBUTE_GROUPS(vpe);
static void vpe_device_release(struct device *cd)
{
kfree(cd);
}
static struct class vpe_class = {
@ -497,6 +496,7 @@ int __init vpe_module_init(void)
device_del(&vpe_device);
out_class:
put_device(&vpe_device);
class_unregister(&vpe_class);
out_chrdev:
@ -509,7 +509,7 @@ void __exit vpe_module_exit(void)
{
struct vpe *v, *n;
device_del(&vpe_device);
device_unregister(&vpe_device);
class_unregister(&vpe_class);
unregister_chrdev(major, VPE_MODULE_NAME);