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um: fix error return code in winch_tramp()

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[ 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: 89df6bfc04 ("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>
This commit is contained in:
Zhen Lei 2021-05-08 11:22:39 +08:00 committed by Greg Kroah-Hartman
parent 9bb3f31b25
commit aab881d7f0
1 changed files with 2 additions and 1 deletions
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3
arch/um/drivers/chan_user.c
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@ -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;