[PATCH AUTOSEL 4.19 06/31] HID: alps: Fix an error handling path in 'alps_input_configured()'

[Sasha Levin <sashal@kernel.org>]

From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>

[ Upstream commit 8d2e77b39b8fecb794e19cd006a12f90b14dd077 ]

They are issues:
   - if 'input_allocate_device()' fails and return NULL, there is no need
     to free anything and 'input_free_device()' call is a no-op. It can
     be axed.
   - 'ret' is known to be 0 at this point, so we must set it to a
     meaningful value before returning

Fixes: 2562756dde55 ("HID: add Alps I2C HID Touchpad-Stick support")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/hid/hid-alps.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/hid/hid-alps.c b/drivers/hid/hid-alps.c
index 3cd7229b6e546..895f49b565ee1 100644
--- a/drivers/hid/hid-alps.c
+++ b/drivers/hid/hid-alps.c
@@ -734,7 +734,7 @@ static int alps_input_configured(struct hid_device *hdev, struct hid_input *hi)
 	if (data->has_sp) {
 		input2 = input_allocate_device();
 		if (!input2) {
-			input_free_device(input2);
+			ret = -ENOMEM;
 			goto exit;
 		}
 
-- 
2.20.1