[PATCH] drm/gem: Fix resource leaks in drm_gem_huge_mnt_create() error paths

[yaolu]

From: Lu Yao <ya...@kylinos.cn>

Fix two resource leaks in error handling paths:
- Release filesystem type reference obtained by get_fs_type()
- Release fs_context allocated by fs_context_for_mount()

Fixes: 6e0b1b82017b ("drm/gem: Add huge tmpfs mountpoint helpers")
Signed-off-by: Lu Yao <ya...@kylinos.cn>
---
 drivers/gpu/drm/drm_gem.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c
index 3b2448a3a9de..6568fbdc4641 100644
--- a/drivers/gpu/drm/drm_gem.c
+++ b/drivers/gpu/drm/drm_gem.c
@@ -122,19 +122,24 @@ int drm_gem_huge_mnt_create(struct drm_device *dev, const 
char *value)
        if (unlikely(!type))
                return -EOPNOTSUPP;
        fc = fs_context_for_mount(type, SB_KERNMOUNT);
+       put_filesystem(type);
        if (IS_ERR(fc))
                return PTR_ERR(fc);
        ret = vfs_parse_fs_string(fc, "source", "tmpfs");
        if (unlikely(ret))
-               return -ENOPARAM;
+               goto err;
        ret = vfs_parse_fs_string(fc, "huge", value);
        if (unlikely(ret))
-               return -ENOPARAM;
+               goto err;
 
        dev->huge_mnt = fc_mount_longterm(fc);
        put_fs_context(fc);
 
        return drmm_add_action_or_reset(dev, drm_gem_huge_mnt_free, NULL);
+
+err:
+       put_fs_context(fc);
+       return -ENOPARAM;
 }
 EXPORT_SYMBOL_GPL(drm_gem_huge_mnt_create);
 #endif
-- 
2.25.1