8250_men_mcb: fix error handling in read_uarts_available_from_reg()

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If ioremap() fails, it returns NULL pointer, not ERR_PTR(), fix the
return value check and call release_mem_region() to release resource.

Fixes: c563831ba8 ("8250_men_mcb: Make UART config auto configurable")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20230728085723.3195044-1-yangyingliang@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Yang Yingliang 2023-07-28 16:57:23 +08:00 • committed by Greg Kroah-Hartman

parent 9b4e18f032

commit 5f45b336fc

1 changed files with 4 additions and 1 deletions

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drivers/tty/serial/8250/8250_men_mcb.c

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