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authorM Chetan Kumar <m.chetan.kumar@linux.intel.com>2022-02-14 12:46:52 +0530
committerDavid S. Miller <davem@davemloft.net>2022-02-14 14:09:59 +0000
commit76f05d88623e559eb9fc41db9fb911e67fab0e7a (patch)
tree250df0e8aa5f91639aea956a762650cbb8785cea /include/linux/wwan.h
parent1e997d040ab4f6802a2f88443caf2d84d3465397 (diff)
net: wwan: debugfs obtained dev reference not dropped
WWAN driver call's wwan_get_debugfs_dir() to obtain WWAN debugfs dir entry. As part of this procedure it returns a reference to a found device. Since there is no debugfs interface available at WWAN subsystem, it is not possible to drop dev reference post debugfs use. This leads to side effects like post wwan driver load and reload the wwan instance gets increment from wwanX to wwanX+1. A new debugfs interface is added in wwan subsystem so that wwan driver can drop the obtained dev reference post debugfs use. void wwan_put_debugfs_dir(struct dentry *dir) Signed-off-by: M Chetan Kumar <m.chetan.kumar@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/wwan.h')
-rw-r--r--include/linux/wwan.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/wwan.h b/include/linux/wwan.h
index afb3334ec8c5..5ce2acf444fb 100644
--- a/include/linux/wwan.h
+++ b/include/linux/wwan.h
@@ -174,11 +174,13 @@ void wwan_unregister_ops(struct device *parent);
#ifdef CONFIG_WWAN_DEBUGFS
struct dentry *wwan_get_debugfs_dir(struct device *parent);
+void wwan_put_debugfs_dir(struct dentry *dir);
#else
static inline struct dentry *wwan_get_debugfs_dir(struct device *parent)
{
return ERR_PTR(-ENODEV);
}
+static inline void wwan_put_debugfs_dir(struct dentry *dir) {}
#endif
#endif /* __WWAN_H */