IB/srp: Semaphore to mutex conversion

Convert srp_host->target_mutex from a semaphore to a mutex.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

diff --git a/drivers/infiniband/ulp/srp/ib_srp.c b/drivers/infiniband/ulp/srp/ib_srp.c
index 31207e6..2d2d4ac 100644 (file)
--- a/drivers/infiniband/ulp/srp/ib_srp.c
+++ b/drivers/infiniband/ulp/srp/ib_srp.c
@@ -357,9 +357,9 @@ static void srp_remove_work(void *target_ptr)
        target->state = SRP_TARGET_REMOVED;
        spin_unlock_irq(target->scsi_host->host_lock);
 
-       down(&target->srp_host->target_mutex);
+       mutex_lock(&target->srp_host->target_mutex);
        list_del(&target->list);
-       up(&target->srp_host->target_mutex);
+       mutex_unlock(&target->srp_host->target_mutex);
 
        scsi_remove_host(target->scsi_host);
        ib_destroy_cm_id(target->cm_id);
@@ -1254,9 +1254,9 @@ static int srp_add_target(struct srp_host *host, struct srp_target_port *target)
        if (scsi_add_host(target->scsi_host, host->dev->dma_device))
                return -ENODEV;
 
-       down(&host->target_mutex);
+       mutex_lock(&host->target_mutex);
        list_add_tail(&target->list, &host->target_list);
-       up(&host->target_mutex);
+       mutex_unlock(&host->target_mutex);
 
        target->state = SRP_TARGET_LIVE;
 
@@ -1525,7 +1525,7 @@ static struct srp_host *srp_add_port(struct ib_device *device, u8 port)
                return NULL;
 
        INIT_LIST_HEAD(&host->target_list);
-       init_MUTEX(&host->target_mutex);
+       mutex_init(&host->target_mutex);
        init_completion(&host->released);
        host->dev  = device;
        host->port = port;
@@ -1626,7 +1626,7 @@ static void srp_remove_one(struct ib_device *device)
                 * Mark all target ports as removed, so we stop queueing
                 * commands and don't try to reconnect.
                 */
-               down(&host->target_mutex);
+               mutex_lock(&host->target_mutex);
                list_for_each_entry_safe(target, tmp_target,
                                         &host->target_list, list) {
                        spin_lock_irqsave(target->scsi_host->host_lock, flags);
@@ -1634,7 +1634,7 @@ static void srp_remove_one(struct ib_device *device)
                                target->state = SRP_TARGET_REMOVED;
                        spin_unlock_irqrestore(target->scsi_host->host_lock, flags);
                }
-               up(&host->target_mutex);
+               mutex_unlock(&host->target_mutex);
 
                /*
                 * Wait for any reconnection tasks that may have

diff --git a/drivers/infiniband/ulp/srp/ib_srp.h b/drivers/infiniband/ulp/srp/ib_srp.h
index b564f18..4e7727d 100644 (file)
--- a/drivers/infiniband/ulp/srp/ib_srp.h
+++ b/drivers/infiniband/ulp/srp/ib_srp.h
@@ -37,8 +37,7 @@
 
 #include <linux/types.h>
 #include <linux/list.h>
-
-#include <asm/semaphore.h>
+#include <linux/mutex.h>
 
 #include <scsi/scsi_host.h>
 #include <scsi/scsi_cmnd.h>
@@ -85,7 +84,7 @@ struct srp_host {
        struct ib_mr           *mr;
        struct class_device     class_dev;
        struct list_head        target_list;
-       struct semaphore        target_mutex;
+       struct mutex            target_mutex;
        struct completion       released;
        struct list_head        list;
 };