8250_pci: improve code comments and Kconfig help

The recent regression about NetMos 9835 Multi-I/O boards indicates
that comment pointing to the parport_serial driver could be helpful.

Signed-off-by: Stefan Seyfried <seife+kernel@b1-systems.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c
index c52948b368d81a1dbd6ea274ffa3058f1128ea37..c626c4fcf9b81d006751589bdf3a84541cbf3451 100644 (file)
--- a/drivers/tty/serial/8250/8250_pci.c
+++ b/drivers/tty/serial/8250/8250_pci.c
@@ -4797,6 +4797,12 @@ static struct pci_device_id serial_pci_tbl[] = {
                PCI_VENDOR_ID_IBM, 0x0299,
                0, 0, pbn_b0_bt_2_115200 },
 
+       /*
+        * other NetMos 9835 devices are most likely handled by the
+        * parport_serial driver, check drivers/parport/parport_serial.c
+        * before adding them here.
+        */
+
        {       PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9901,
                0xA000, 0x1000,
                0, 0, pbn_b0_1_115200 },

diff --git a/drivers/tty/serial/8250/Kconfig b/drivers/tty/serial/8250/Kconfig
index a1ba94d648859ecc8c722877ff38fffaf5ce1c96..f3b306efaa591d518b1b894253e0714ea3cba5c6 100644 (file)
--- a/drivers/tty/serial/8250/Kconfig
+++ b/drivers/tty/serial/8250/Kconfig
@@ -116,6 +116,8 @@ config SERIAL_8250_PCI
          This builds standard PCI serial support. You may be able to
          disable this feature if you only need legacy serial support.
          Saves about 9K.
+         Note that serial ports on NetMos 9835 Multi-I/O cards are handled
+         by the parport_serial driver, enabled with CONFIG_PARPORT_SERIAL.
 
 config SERIAL_8250_HP300
        tristate