pcmcia: use ops_mutex for rsrc_{mgr,nonstatic} locking

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

1 files changed, 5 insertions, 1 deletions

diff --git a/drivers/pcmcia/ds.c b/drivers/pcmcia/ds.c
index 253d9aca5f77..76a21638291b 100644
--- a/drivers/pcmcia/ds.c
+++ b/drivers/pcmcia/ds.c
@@ -607,19 +607,23 @@ static int pcmcia_card_add(struct pcmcia_socket *s)
 {
         cistpl_longlink_mfc_t mfc;
         unsigned int no_funcs, i, no_chains;
-        int ret = 0;
+        int ret = -EAGAIN;
 
+        mutex_lock(&s->ops_mutex);
         if (!(s->resource_setup_done)) {
                 dev_dbg(&s->dev,
                            "no resources available, delaying card_add\n");
+                mutex_unlock(&s->ops_mutex);
                 return -EAGAIN; /* try again, but later... */
         }
 
         if (pcmcia_validate_mem(s)) {
                 dev_dbg(&s->dev, "validating mem resources failed, "
                        "delaying card_add\n");
+                mutex_unlock(&s->ops_mutex);
                 return -EAGAIN; /* try again, but later... */
         }
+        mutex_unlock(&s->ops_mutex);
 
         ret = pccard_validate_cis(s, &no_chains);
         if (ret || !no_chains) {