serial: 8250_mxpcie: only unregister the ports that were registered

When serial8250_register_8250_port() fails the loop stops and the probe
keeps the ports registered so far, like pciserial_init_ports() in
8250_pci.c this driver was split from.  What the split lost is that
function's priv->nr: mxpcie8250_remove() walks all num_ports entries,
but the ones the loop never reached keep the zero devm_kzalloc() left
there, and the one that failed keeps a negative error code.

serial8250_unregister_port() checks neither, so removal unregisters
line 0 - a port this driver does not own - and indexes
serial8250_ports[] with a negative line number.

Record how many ports were registered and unregister only those.

Fixes: 0481a041e956 ("serial: 8250: split Moxa PCIe serial board support out of 8250_pci")
Signed-off-by: Linmao Li <lilinmao@kylinos.cn>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Crescent Hsieh <crescentcy.hsieh@moxa.com>
Link: https://patch.msgid.link/20260901041519.114737-3-lilinmao@kylinos.cn
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

0 files changed, 0 insertions, 0 deletions