[PATCH 1/6] tty: serial: 8250: Fix the amount of ports doesn't match the device

Crescent Hsieh
2024-06-07T11:43:50Z

Normally, the amount of ports is written at the third digit of device ID
of Moxa PCI boards, for example: `0x1121` indicates a 2 ports device.

However, `CP116E_A_A` and `CP116E_A_B` are two exceptions, which has 8
ports but the third digit of device ID is `6`.

This patch fixes the issue above by adding checks.

Signed-off-by: Crescent Hsieh <crescentcy.hsieh@moxa.com>
---
drivers/tty/serial/8250/8250_pci.c | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c
index 40af74b55933..4e88ee07e548 100644
--- a/drivers/tty/serial/8250/8250_pci.c
+++ b/drivers/tty/serial/8250/8250_pci.c
@@ -2041,6 +2041,10 @@ static int pci_moxa_init(struct pci_dev *dev)
unsigned int num_ports = (device & 0x00F0) >> 4, i;
u8 val, init_mode = MOXA_RS232;

+ if (device == PCI_DEVICE_ID_MOXA_CP116E_A_A ||
+ device == PCI_DEVICE_ID_MOXA_CP116E_A_B)
+ num_ports = 8;
+
if (!(pci_moxa_supported_rs(dev) & MOXA_SUPP_RS232)) {
init_mode = MOXA_RS422;
}
--
2.34.1