[PATCH 4.19 385/421] um: fix error return code in slip_open()

From: Greg Kroah-Hartman
Date: Mon Jul 19 2021 - 12:42:58 EST


From: Zhen Lei <thunder.leizhen@xxxxxxxxxx>

[ Upstream commit b77e81fbe5f5fb4ad9a61ec80f6d1e30b6da093a ]

Fix to return a negative error code from the error handling case instead
of 0, as done elsewhere in this function.

Fixes: a3c77c67a443 ("[PATCH] uml: slirp and slip driver cleanups and fixes")
Reported-by: Hulk Robot <hulkci@xxxxxxxxxx>
Signed-off-by: Zhen Lei <thunder.leizhen@xxxxxxxxxx>
Acked-By: anton.ivanov@xxxxxxxxxxxxxxxxxx
Signed-off-by: Richard Weinberger <richard@xxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
arch/um/drivers/slip_user.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/um/drivers/slip_user.c b/arch/um/drivers/slip_user.c
index 0d6b66c64a81..76d155631c5d 100644
--- a/arch/um/drivers/slip_user.c
+++ b/arch/um/drivers/slip_user.c
@@ -145,7 +145,8 @@ static int slip_open(void *data)
}
sfd = err;

- if (set_up_tty(sfd))
+ err = set_up_tty(sfd);
+ if (err)
goto out_close2;

pri->slave = sfd;
--
2.30.2