[PATCH] USBATM: semaphore to mutex conversion

This is the usbatm part of the Arjan, Jes and Ingo
mass semaphore to mutex conversion, reworked to apply on top
of the patches I just sent to you.  This time, with correct
attribution and signed-off lines.
Signed-off-by: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Duncan Sands <baldrick@free.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/atm/cxacru.c

@@ -36,6 +36,7 @@
 #include <linux/init.h>
 #include <linux/device.h>	/* FIXME: linux/firmware.h should include it itself */
 #include <linux/firmware.h>
+#include <linux/mutex.h>
 
 #include "usbatm.h"
 
@@ -160,7 +161,7 @@ struct cxacru_data {
 	struct work_struct poll_work;
 
 	/* contol handles */
-	struct semaphore cm_serialize;
+	struct mutex cm_serialize;
 	u8 *rcv_buf;
 	u8 *snd_buf;
 	struct urb *rcv_urb;
@@ -219,7 +220,7 @@ static int cxacru_cm(struct cxacru_data *instance, enum cxacru_cm_request cm,
 		goto fail;
 	}
 
-	down(&instance->cm_serialize);
+	mutex_lock(&instance->cm_serialize);
 
 	/* submit reading urb before the writing one */
 	init_completion(&instance->rcv_done);
@@ -288,7 +289,7 @@ static int cxacru_cm(struct cxacru_data *instance, enum cxacru_cm_request cm,
 	ret = offd;
 	dbg("cm %#x", cm);
 fail:
-	up(&instance->cm_serialize);
+	mutex_unlock(&instance->cm_serialize);
 	return ret;
 }
 
@@ -717,7 +718,7 @@ static int cxacru_bind(struct usbatm_data *usbatm_instance,
 			instance->snd_buf, PAGE_SIZE,
 			cxacru_blocking_completion, &instance->snd_done, 4);
 
-	init_MUTEX(&instance->cm_serialize);
+	mutex_init(&instance->cm_serialize);
 
 	INIT_WORK(&instance->poll_work, (void *)cxacru_poll_status, instance);
 

drivers/usb/atm/ueagle-atm.c

@@ -63,6 +63,7 @@
 #include <linux/ctype.h>
 #include <linux/kthread.h>
 #include <linux/version.h>
+#include <linux/mutex.h>
 #include <asm/unaligned.h>
 
 #include "usbatm.h"
@@ -358,7 +359,7 @@ struct intr_pkt {
 #define INTR_PKT_SIZE 28
 
 static struct usb_driver uea_driver;
-static DECLARE_MUTEX(uea_semaphore);
+static DEFINE_MUTEX(uea_mutex);
 static const char *chip_name[] = {"ADI930", "Eagle I", "Eagle II", "Eagle III"};
 
 static int modem_index;
@@ -1418,13 +1419,13 @@ static ssize_t read_status(struct device *dev, struct device_attribute *attr,
 	int ret = -ENODEV;
 	struct uea_softc *sc;
 
-	down(&uea_semaphore);
+	mutex_lock(&uea_mutex);
 	sc = dev_to_uea(dev);
 	if (!sc)
 		goto out;
 	ret = snprintf(buf, 10, "%08x\n", sc->stats.phy.state);
 out:
-	up(&uea_semaphore);
+	mutex_unlock(&uea_mutex);
 	return ret;
 }
 
@@ -1434,14 +1435,14 @@ static ssize_t reboot(struct device *dev, struct device_attribute *attr,
 	int ret = -ENODEV;
 	struct uea_softc *sc;
 
-	down(&uea_semaphore);
+	mutex_lock(&uea_mutex);
 	sc = dev_to_uea(dev);
 	if (!sc)
 		goto out;
 	sc->reset = 1;
 	ret = count;
 out:
-	up(&uea_semaphore);
+	mutex_unlock(&uea_mutex);
 	return ret;
 }
 
@@ -1453,7 +1454,7 @@ static ssize_t read_human_status(struct device *dev, struct device_attribute *at
 	int ret = -ENODEV;
 	struct uea_softc *sc;
 
-	down(&uea_semaphore);
+	mutex_lock(&uea_mutex);
 	sc = dev_to_uea(dev);
 	if (!sc)
 		goto out;
@@ -1473,7 +1474,7 @@ static ssize_t read_human_status(struct device *dev, struct device_attribute *at
 		break;
 	}
 out:
-	up(&uea_semaphore);
+	mutex_unlock(&uea_mutex);
 	return ret;
 }
 
@@ -1485,7 +1486,7 @@ static ssize_t read_delin(struct device *dev, struct device_attribute *attr,
 	int ret = -ENODEV;
 	struct uea_softc *sc;
 
-	down(&uea_semaphore);
+	mutex_lock(&uea_mutex);
 	sc = dev_to_uea(dev);
 	if (!sc)
 		goto out;
@@ -1497,7 +1498,7 @@ static ssize_t read_delin(struct device *dev, struct device_attribute *attr,
 	else
 		ret = sprintf(buf, "GOOD\n");
 out:
-	up(&uea_semaphore);
+	mutex_unlock(&uea_mutex);
 	return ret;
 }
 
@@ -1511,7 +1512,7 @@ static ssize_t read_##name(struct device *dev, 			\
 	int ret = -ENODEV; 					\
 	struct uea_softc *sc; 					\
  								\
-	down(&uea_semaphore); 					\
+	mutex_lock(&uea_mutex); 					\
 	sc = dev_to_uea(dev);					\
 	if (!sc) 						\
 		goto out; 					\
@@ -1519,7 +1520,7 @@ static ssize_t read_##name(struct device *dev, 			\
 	if (reset)						\
 		sc->stats.phy.name = 0;				\
 out: 								\
-	up(&uea_semaphore); 					\
+	mutex_unlock(&uea_mutex); 					\
 	return ret; 						\
 } 								\
 								\
@@ -1737,9 +1738,9 @@ static void uea_disconnect(struct usb_interface *intf)
 	 * Pre-firmware device has one interface
 	 */
 	if (usb->config->desc.bNumInterfaces != 1 && ifnum == 0) {
-		down(&uea_semaphore);
+		mutex_lock(&uea_mutex);
 		usbatm_usb_disconnect(intf);
-		up(&uea_semaphore);
+		mutex_unlock(&uea_mutex);
 		uea_info(usb, "ADSL device removed\n");
 	}
 

drivers/usb/atm/usbatm.c

@@ -823,7 +823,7 @@ static int usbatm_atm_open(struct atm_vcc *vcc)
 		return -EINVAL;
 	}
 
-	down(&instance->serialize);	/* vs self, usbatm_atm_close, usbatm_usb_disconnect */
+	mutex_lock(&instance->serialize);	/* vs self, usbatm_atm_close, usbatm_usb_disconnect */
 
 	if (instance->disconnected) {
 		atm_dbg(instance, "%s: disconnected!\n", __func__);
@@ -867,7 +867,7 @@ static int usbatm_atm_open(struct atm_vcc *vcc)
 	set_bit(ATM_VF_PARTIAL, &vcc->flags);
 	set_bit(ATM_VF_READY, &vcc->flags);
 
-	up(&instance->serialize);
+	mutex_unlock(&instance->serialize);
 
 	atm_dbg(instance, "%s: allocated vcc data 0x%p\n", __func__, new);
 
@@ -875,7 +875,7 @@ static int usbatm_atm_open(struct atm_vcc *vcc)
 
 fail:
 	kfree(new);
-	up(&instance->serialize);
+	mutex_unlock(&instance->serialize);
 	return ret;
 }
 
@@ -896,7 +896,7 @@ static void usbatm_atm_close(struct atm_vcc *vcc)
 
 	usbatm_cancel_send(instance, vcc);
 
-	down(&instance->serialize);	/* vs self, usbatm_atm_open, usbatm_usb_disconnect */
+	mutex_lock(&instance->serialize);	/* vs self, usbatm_atm_open, usbatm_usb_disconnect */
 
 	tasklet_disable(&instance->rx_channel.tasklet);
 	if (instance->cached_vcc == vcc_data) {
@@ -919,7 +919,7 @@ static void usbatm_atm_close(struct atm_vcc *vcc)
 	clear_bit(ATM_VF_PARTIAL, &vcc->flags);
 	clear_bit(ATM_VF_ADDR, &vcc->flags);
 
-	up(&instance->serialize);
+	mutex_unlock(&instance->serialize);
 
 	atm_dbg(instance, "%s successful\n", __func__);
 }
@@ -1009,9 +1009,9 @@ static int usbatm_do_heavy_init(void *arg)
 	if (!ret)
 		ret = usbatm_atm_init(instance);
 
-	down(&instance->serialize);
+	mutex_lock(&instance->serialize);
 	instance->thread_pid = -1;
-	up(&instance->serialize);
+	mutex_unlock(&instance->serialize);
 
 	complete_and_exit(&instance->thread_exited, ret);
 }
@@ -1025,9 +1025,9 @@ static int usbatm_heavy_init(struct usbatm_data *instance)
 		return ret;
 	}
 
-	down(&instance->serialize);
+	mutex_lock(&instance->serialize);
 	instance->thread_pid = ret;
-	up(&instance->serialize);
+	mutex_unlock(&instance->serialize);
 
 	wait_for_completion(&instance->thread_started);
 
@@ -1110,7 +1110,7 @@ int usbatm_usb_probe(struct usb_interface *intf, const struct usb_device_id *id,
 	/* private fields */
 
 	kref_init(&instance->refcount);		/* dropped in usbatm_usb_disconnect */
-	init_MUTEX(&instance->serialize);
+	mutex_init(&instance->serialize);
 
 	instance->thread_pid = -1;
 	init_completion(&instance->thread_started);
@@ -1273,18 +1273,18 @@ void usbatm_usb_disconnect(struct usb_interface *intf)
 
 	usb_set_intfdata(intf, NULL);
 
-	down(&instance->serialize);
+	mutex_lock(&instance->serialize);
 	instance->disconnected = 1;
 	if (instance->thread_pid >= 0)
 		kill_proc(instance->thread_pid, SIGTERM, 1);
-	up(&instance->serialize);
+	mutex_unlock(&instance->serialize);
 
 	wait_for_completion(&instance->thread_exited);
 
-	down(&instance->serialize);
+	mutex_lock(&instance->serialize);
 	list_for_each_entry(vcc_data, &instance->vcc_list, list)
 		vcc_release_async(vcc_data->vcc, -EPIPE);
-	up(&instance->serialize);
+	mutex_unlock(&instance->serialize);
 
 	tasklet_disable(&instance->rx_channel.tasklet);
 	tasklet_disable(&instance->tx_channel.tasklet);

drivers/usb/atm/usbatm.h

@@ -34,6 +34,7 @@
 #include <linux/list.h>
 #include <linux/stringify.h>
 #include <linux/usb.h>
+#include <linux/mutex.h>
 
 /*
 #define VERBOSE_DEBUG
@@ -171,7 +172,7 @@ struct usbatm_data {
         ********************************/
 
 	struct kref refcount;
-	struct semaphore serialize;
+	struct mutex serialize;
 	int disconnected;
 
 	/* heavy init */