pcmcia: fix ioport size calculation in rsrc_nonstatic

Size needs to be calculated after manipulating with the start value.

Reported-by: Komuro <komurojun-mbn@nifty.com>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/pcmcia/rsrc_nonstatic.c b/drivers/pcmcia/rsrc_nonstatic.c
index 1178a823fbc6..a6eb7b59ba9f 100644
--- a/drivers/pcmcia/rsrc_nonstatic.c
+++ b/drivers/pcmcia/rsrc_nonstatic.c
@@ -810,7 +810,7 @@ static int adjust_memory(struct pcmcia_socket *s, unsigned int action, unsigned
 static int adjust_io(struct pcmcia_socket *s, unsigned int action, unsigned long start, unsigned long end)
 {
         struct socket_data *data = s->resource_data;
-        unsigned long size = end - start + 1;
+        unsigned long size;
         int ret = 0;
 
 #if defined(CONFIG_X86)
@@ -820,6 +820,8 @@ static int adjust_io(struct pcmcia_socket *s, unsigned int action, unsigned long
                 start = 0x100;
 #endif
 
+        size = end - start + 1;
+
         if (end < start)
                 return -EINVAL;