commit 0201ed0349a71cec12ced7e142e6df78504f38fb
author Samuel Ortiz <sameo@linux.intel.com> Thu May 31 17:56:46 2012 +0200
committer Samuel Ortiz <sameo@linux.intel.com> Mon Jun 04 21:34:34 2012 +0200
tree 990880344d33e424ccd777fc3635cf6394ad0ff9
parent 41a8ec496de8f4ef161fa0293de8cd9aa5773325

NFC: Convert pn533 from semaphore to mutex

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

drivers/nfc/pn533.c

diff --git a/drivers/nfc/pn533.c b/drivers/nfc/pn533.c
index b97e3c8..58c1641 100644
--- a/drivers/nfc/pn533.c
+++ b/drivers/nfc/pn533.c
@@ -329,7 +329,7 @@
 
 	pn533_cmd_complete_t cmd_complete;
 	void *cmd_complete_arg;
-	struct semaphore cmd_lock;
+	struct mutex cmd_lock;
 	u8 cmd;
 
 	struct pn533_poll_modulations *poll_mod_active[PN533_POLL_MOD_MAX + 1];
@@ -462,7 +462,7 @@
 					PN533_FRAME_CMD_PARAMS_LEN(in_frame));
 
 	if (rc != -EINPROGRESS)
-		up(&dev->cmd_lock);
+		mutex_unlock(&dev->cmd_lock);
 }
 
 static void pn533_recv_response(struct urb *urb)
@@ -640,7 +640,7 @@
 
 	nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
 
-	if (down_trylock(&dev->cmd_lock))
+	if (!mutex_trylock(&dev->cmd_lock))
 		return -EBUSY;
 
 	rc = __pn533_send_cmd_frame_async(dev, out_frame, in_frame,
@@ -650,7 +650,7 @@
 
 	return 0;
 error:
-	up(&dev->cmd_lock);
+	mutex_unlock(&dev->cmd_lock);
 	return rc;
 }
 
@@ -1261,7 +1261,7 @@
 
 	dev->cancel_listen = 1;
 
-	up(&dev->cmd_lock);
+	mutex_unlock(&dev->cmd_lock);
 
 	pn533_poll_next_mod(dev);
 
@@ -2054,7 +2054,7 @@
 
 	kfree(arg);
 
-	up(&dev->cmd_lock);
+	mutex_unlock(&dev->cmd_lock);
 }
 
 static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata,
@@ -2114,7 +2114,7 @@
 
 	dev->udev = usb_get_dev(interface_to_usbdev(interface));
 	dev->interface = interface;
-	sema_init(&dev->cmd_lock, 1);
+	mutex_init(&dev->cmd_lock);
 
 	iface_desc = interface->cur_altsetting;
 	for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {