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authorDominik Brodowski <linux@dominikbrodowski.net>2010-01-17 18:31:34 +0100
committerDominik Brodowski <linux@dominikbrodowski.net>2010-02-17 17:48:22 +0100
commit94a819f80297e1f635a7cde4ed5317612e512ba7 (patch)
tree9bbb1eab3a0f0c722fe40295fb512d99cc0190d9 /drivers/pcmcia/ds.c
parent3d068261854b00c930df4516cd617900935e7706 (diff)
pcmcia: assert locking to struct pcmcia_device
Tested-by: Wolfram Sang <w.sang@pengutronix.de> Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Diffstat (limited to 'drivers/pcmcia/ds.c')
-rw-r--r--drivers/pcmcia/ds.c38
1 files changed, 27 insertions, 11 deletions
diff --git a/drivers/pcmcia/ds.c b/drivers/pcmcia/ds.c
index 4c40db8889d..83b51ddd3da 100644
--- a/drivers/pcmcia/ds.c
+++ b/drivers/pcmcia/ds.c
@@ -835,6 +835,8 @@ static inline int pcmcia_devmatch(struct pcmcia_device *dev,
}
if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
+ int ret;
+
if ((!dev->has_func_id) || (dev->func_id != did->func_id))
return 0;
@@ -849,10 +851,15 @@ static inline int pcmcia_devmatch(struct pcmcia_device *dev,
* after it has re-checked that there is no possible module
* with a prod_id/manf_id/card_id match.
*/
- dev_dbg(&dev->dev,
- "skipping FUNC_ID match until userspace interaction\n");
- if (!dev->allow_func_id_match)
+ mutex_lock(&dev->socket->ops_mutex);
+ ret = dev->allow_func_id_match;
+ mutex_unlock(&dev->socket->ops_mutex);
+
+ if (!ret) {
+ dev_dbg(&dev->dev,
+ "skipping FUNC_ID match until userspace ACK\n");
return 0;
+ }
}
if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
@@ -1079,9 +1086,9 @@ static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
if (!count)
return -EINVAL;
- mutex_lock(&p_dev->socket->skt_mutex);
+ mutex_lock(&p_dev->socket->ops_mutex);
p_dev->allow_func_id_match = 1;
- mutex_unlock(&p_dev->socket->skt_mutex);
+ mutex_unlock(&p_dev->socket->ops_mutex);
ret = bus_rescan_devices(&pcmcia_bus_type);
if (ret)
@@ -1114,8 +1121,13 @@ static int pcmcia_dev_suspend(struct device *dev, pm_message_t state)
struct pcmcia_driver *p_drv = NULL;
int ret = 0;
- if (p_dev->suspended)
+ mutex_lock(&p_dev->socket->ops_mutex);
+ if (p_dev->suspended) {
+ mutex_unlock(&p_dev->socket->ops_mutex);
return 0;
+ }
+ p_dev->suspended = 1;
+ mutex_unlock(&p_dev->socket->ops_mutex);
dev_dbg(dev, "suspending\n");
@@ -1132,6 +1144,9 @@ static int pcmcia_dev_suspend(struct device *dev, pm_message_t state)
"pcmcia: device %s (driver %s) did "
"not want to go to sleep (%d)\n",
p_dev->devname, p_drv->drv.name, ret);
+ mutex_lock(&p_dev->socket->ops_mutex);
+ p_dev->suspended = 0;
+ mutex_unlock(&p_dev->socket->ops_mutex);
goto out;
}
}
@@ -1142,8 +1157,6 @@ static int pcmcia_dev_suspend(struct device *dev, pm_message_t state)
}
out:
- if (!ret)
- p_dev->suspended = 1;
return ret;
}
@@ -1154,8 +1167,13 @@ static int pcmcia_dev_resume(struct device *dev)
struct pcmcia_driver *p_drv = NULL;
int ret = 0;
- if (!p_dev->suspended)
+ mutex_lock(&p_dev->socket->ops_mutex);
+ if (!p_dev->suspended) {
+ mutex_unlock(&p_dev->socket->ops_mutex);
return 0;
+ }
+ p_dev->suspended = 0;
+ mutex_unlock(&p_dev->socket->ops_mutex);
dev_dbg(dev, "resuming\n");
@@ -1176,8 +1194,6 @@ static int pcmcia_dev_resume(struct device *dev)
ret = p_drv->resume(p_dev);
out:
- if (!ret)
- p_dev->suspended = 0;
return ret;
}