pcmcia: fix matching rules for pseudo-multi-function cards

Prevent PCMCIA_DEV_ID_MATCH_FUNC_ID from grabbing PFC-cards:
I changed the code, so that the first matching struct
pcmcia_device_id _PFC_ entry will mark the card has_pfc,
preventing PCMCIA_DEV_ID_MATCH_FUNC_ID to match.

[linux-pcmcia@lists.infradead.org: re-order commit message]
Signed-off-by: Alexander Kurz <linux@kbdbabel.org>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>

1 files changed, 4 insertions, 3 deletions

diff --git a/drivers/pcmcia/ds.c b/drivers/pcmcia/ds.c
index 92a5af8aa0b4..508f94a2a78d 100644
--- a/drivers/pcmcia/ds.c
+++ b/drivers/pcmcia/ds.c
@@ -820,11 +820,12 @@ static inline int pcmcia_devmatch(struct pcmcia_device *dev,
         }
 
         if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
-                if (dev->device_no != did->device_no)
-                        return 0;
+                dev_dbg(&dev->dev, "this is a pseudo-multi-function device\n");
                 mutex_lock(&dev->socket->ops_mutex);
                 dev->socket->pcmcia_state.has_pfc = 1;
                 mutex_unlock(&dev->socket->ops_mutex);
+                if (dev->device_no != did->device_no)
+                        return 0;
         }
 
         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
@@ -835,7 +836,7 @@ static inline int pcmcia_devmatch(struct pcmcia_device *dev,
 
                 /* if this is a pseudo-multi-function device,
                  * we need explicit matches */
-                if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO)
+                if (dev->socket->pcmcia_state.has_pfc)
                         return 0;
                 if (dev->device_no)
                         return 0;