1 files changed, 21 insertions, 37 deletions

diff --git a/drivers/firewire/fw-transaction.c b/drivers/firewire/fw-transaction.c
index 861dd60de7d9..e5d1a0b64fcf 100644
--- a/drivers/firewire/fw-transaction.c
+++ b/drivers/firewire/fw-transaction.c
@@ -22,6 +22,7 @@
 #include <linux/kernel.h>
 #include <linux/kref.h>
 #include <linux/module.h>
+#include <linux/mutex.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
 #include <linux/pci.h>
@@ -295,58 +296,41 @@ fw_send_request(struct fw_card *card, struct fw_transaction *t,
 }
 EXPORT_SYMBOL(fw_send_request);
 
-struct fw_phy_packet {
-        struct fw_packet packet;
-        struct completion done;
-        struct kref kref;
-};
-
-static void phy_packet_release(struct kref *kref)
-{
-        struct fw_phy_packet *p =
-                        container_of(kref, struct fw_phy_packet, kref);
-        kfree(p);
-}
+static DEFINE_MUTEX(phy_config_mutex);
+static DECLARE_COMPLETION(phy_config_done);
 
 static void transmit_phy_packet_callback(struct fw_packet *packet,
                                          struct fw_card *card, int status)
 {
-        struct fw_phy_packet *p =
-                        container_of(packet, struct fw_phy_packet, packet);
-
-        complete(&p->done);
-        kref_put(&p->kref, phy_packet_release);
+        complete(&phy_config_done);
 }
 
+static struct fw_packet phy_config_packet = {
+        .header_length  = 8,
+        .payload_length = 0,
+        .speed          = SCODE_100,
+        .callback       = transmit_phy_packet_callback,
+};
+
 void fw_send_phy_config(struct fw_card *card,
                         int node_id, int generation, int gap_count)
 {
-        struct fw_phy_packet *p;
         long timeout = DIV_ROUND_UP(HZ, 10);
         u32 data = PHY_IDENTIFIER(PHY_PACKET_CONFIG) |
                    PHY_CONFIG_ROOT_ID(node_id) |
                    PHY_CONFIG_GAP_COUNT(gap_count);
 
-        p = kmalloc(sizeof(*p), GFP_KERNEL);
-        if (p == NULL)
-                return;
+        mutex_lock(&phy_config_mutex);
+
+        phy_config_packet.header[0] = data;
+        phy_config_packet.header[1] = ~data;
+        phy_config_packet.generation = generation;
+        INIT_COMPLETION(phy_config_done);
+
+        card->driver->send_request(card, &phy_config_packet);
+        wait_for_completion_timeout(&phy_config_done, timeout);
 
-        p->packet.header[0] = data;
-        p->packet.header[1] = ~data;
-        p->packet.header_length = 8;
-        p->packet.payload_length = 0;
-        p->packet.speed = SCODE_100;
-        p->packet.generation = generation;
-        p->packet.callback = transmit_phy_packet_callback;
-        init_completion(&p->done);
-        kref_set(&p->kref, 2);
-
-        card->driver->send_request(card, &p->packet);
-        timeout = wait_for_completion_timeout(&p->done, timeout);
-        kref_put(&p->kref, phy_packet_release);
-
-        /* will leak p if the callback is never executed */
-        WARN_ON(timeout == 0);
+        mutex_unlock(&phy_config_mutex);
 }
 
 void fw_flush_transactions(struct fw_card *card)