[SERIAL] Fix matching of MMIO ports

The function uart_match_port() incorrectly compares the ioremap'd
virtual addresses of ports instead of the physical address to find
duplicate ports for MMIO based UARTs. This fixes it.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/serial/serial_core.c b/drivers/serial/serial_core.c
index c17d680e3f04..34c576dfad8d 100644
--- a/drivers/serial/serial_core.c
+++ b/drivers/serial/serial_core.c
@@ -2307,7 +2307,7 @@ int uart_match_port(struct uart_port *port1, struct uart_port *port2)
                 return (port1->iobase == port2->iobase) &&
                        (port1->hub6   == port2->hub6);
         case UPIO_MEM:
-                return (port1->membase == port2->membase);
+                return (port1->mapbase == port2->mapbase);
         }
         return 0;
 }