[PATCH] PCDP: if PCDP contains parity information, use it

If the PCDP supplies parity, use it (only none/even/odd supported), and
don't append parity/stop bit arguments unless baud is present.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 11 insertions, 3 deletions

diff --git a/drivers/firmware/pcdp.c b/drivers/firmware/pcdp.c
index 53c95c0bbf46..ae1fb45dbb40 100644
--- a/drivers/firmware/pcdp.c
+++ b/drivers/firmware/pcdp.c
@@ -25,14 +25,22 @@ setup_serial_console(struct pcdp_uart *uart)
 #ifdef CONFIG_SERIAL_8250_CONSOLE
         int mmio;
         static char options[64], *p = options;
+        char parity;
 
         mmio = (uart->addr.address_space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY);
         p += sprintf(p, "console=uart,%s,0x%lx",
                 mmio ? "mmio" : "io", uart->addr.address);
-        if (uart->baud)
+        if (uart->baud) {
                 p += sprintf(p, ",%lu", uart->baud);
-        if (uart->bits)
-                p += sprintf(p, "n%d", uart->bits);
+                if (uart->bits) {
+                        switch (uart->parity) {
+                            case 0x2: parity = 'e'; break;
+                            case 0x3: parity = 'o'; break;
+                            default:  parity = 'n';
+                        }
+                        p += sprintf(p, "%c%d", parity, uart->bits);
+                }
+        }
 
         return early_serial_console_init(options);
 #else