From: Zhen Lei thunder.leizhen@huawei.com
[ Upstream commit ccf1236ecac476d9d2704866d9a476c86e387971 ]
Fix to return a negative error code from the error handling case instead of 0, as done elsewhere in this function.
Fixes: 89df6bfc0405 ("uml: DEBUG_SHIRQ fixes") Reported-by: Hulk Robot hulkci@huawei.com Signed-off-by: Zhen Lei thunder.leizhen@huawei.com Acked-By: anton.ivanov@cambridgegreys.com Signed-off-by: Richard Weinberger richard@nod.at Signed-off-by: Sasha Levin sashal@kernel.org --- arch/um/drivers/chan_user.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/um/drivers/chan_user.c b/arch/um/drivers/chan_user.c index 9cffbbb15c56..669124d5290b 100644 --- a/arch/um/drivers/chan_user.c +++ b/arch/um/drivers/chan_user.c @@ -256,7 +256,8 @@ static int winch_tramp(int fd, struct tty_port *port, int *fd_out, goto out_close; }
- if (os_set_fd_block(*fd_out, 0)) { + err = os_set_fd_block(*fd_out, 0); + if (err) { printk(UM_KERN_ERR "winch_tramp: failed to set thread_fd " "non-blocking.\n"); goto out_close;