pcmcia: also lock fake and cache CIS by ops_mutex

Specifically,

	struct list_head		cis_cache;
	size_t				fake_cis_len;
	u8				*fake_cis;

are protected.

Tested-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/pcmcia/ds.c b/drivers/pcmcia/ds.c
index 0ab4fe045920..4f7308df22c8 100644
--- a/drivers/pcmcia/ds.c
+++ b/drivers/pcmcia/ds.c
@@ -1241,12 +1241,16 @@ static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
                 s->pcmcia_state.present = 0;
                 pcmcia_card_remove(skt, NULL);
                 handle_event(skt, event);
+                mutex_lock(&s->ops_mutex);
                 destroy_cis_cache(s);
+                mutex_unlock(&s->ops_mutex);
                 break;
 
         case CS_EVENT_CARD_INSERTION:
                 s->pcmcia_state.present = 1;
+                mutex_lock(&s->ops_mutex);
                 destroy_cis_cache(s); /* to be on the safe side... */
+                mutex_unlock(&s->ops_mutex);
                 pcmcia_card_add(skt);
                 handle_event(skt, event);
                 break;
@@ -1259,9 +1263,11 @@ static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
                         dev_dbg(&skt->dev, "cis mismatch - different card\n");
                         /* first, remove the card */
                         ds_event(skt, CS_EVENT_CARD_REMOVAL, CS_EVENT_PRI_HIGH);
+                        mutex_lock(&s->ops_mutex);
                         destroy_cis_cache(skt);
                         kfree(skt->fake_cis);
                         skt->fake_cis = NULL;
+                        mutex_unlock(&s->ops_mutex);
                         /* now, add the new card */
                         ds_event(skt, CS_EVENT_CARD_INSERTION,
                                  CS_EVENT_PRI_LOW);