serial: 8250: drop err label from serial8250_register_8250_port()

serial8250_register_8250_port() holds serial_mutex using guard(), but
still uses goto-based error handling. Mixing the two is discouraged by
the cleanup guidelines.

Move the part of the function which configures the found port into a
new helper: __serial8250_register_8250_port(). It returns an int and
uses plain returns on failures. The caller now resets uart->port.dev on
failure at a single place, so the err label can go.

While at it, simplify the mctrl_gpio_init() error handling: return
PTR_ERR() directly and drop the else branch.

No functional change intended.

Signed-off-by: Jiri Slaby (SUSE) <jirislaby@kernel.org>
Assisted-by: LLM
Link: https://patch.msgid.link/baf799ad88f9ef43093ae96731f48a5e88d726dd.1791873876.git.jirislaby@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

0 files changed, 0 insertions, 0 deletions