From be618f550cb499db263e2ce22c5ad4f4dbfd53e6 Mon Sep 17 00:00:00 2001 From: Amol Lad Date: Sat, 30 Sep 2006 23:29:23 -0700 Subject: [PATCH] [PATCH] ioremap balanced with iounmap for drivers/serial/mpc52xx_uart.c ioremap must be balanced by an iounmap and failing to do so can result in a memory leak. Signed-off-by: Amol Lad Cc: Alan Cox Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/serial/mpc52xx_uart.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/drivers/serial/mpc52xx_uart.c b/drivers/serial/mpc52xx_uart.c index 7708e5dd3656..dbad0e31e005 100644 --- a/drivers/serial/mpc52xx_uart.c +++ b/drivers/serial/mpc52xx_uart.c @@ -338,14 +338,23 @@ mpc52xx_uart_release_port(struct uart_port *port) static int mpc52xx_uart_request_port(struct uart_port *port) { + int err; + if (port->flags & UPF_IOREMAP) /* Need to remap ? */ port->membase = ioremap(port->mapbase, MPC52xx_PSC_SIZE); if (!port->membase) return -EINVAL; - return request_mem_region(port->mapbase, MPC52xx_PSC_SIZE, + err = request_mem_region(port->mapbase, MPC52xx_PSC_SIZE, "mpc52xx_psc_uart") != NULL ? 0 : -EBUSY; + + if (err && (port->flags & UPF_IOREMAP)) { + iounmap(port->membase); + port->membase = NULL; + } + + return err; } static void -- GitLab