[SCSI] ibmvscsi: fix leak when failing to send srp event

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 18 insertions, 12 deletions

diff --git a/drivers/scsi/ibmvscsi/ibmvscsi.c b/drivers/scsi/ibmvscsi/ibmvscsi.c
index 0a8ad37ae899..2e9be83a697f 100644
--- a/drivers/scsi/ibmvscsi/ibmvscsi.c
+++ b/drivers/scsi/ibmvscsi/ibmvscsi.c
@@ -739,7 +739,8 @@ static void send_mad_adapter_info(struct ibmvscsi_host_data *hostdata)
 {
         struct viosrp_adapter_info *req;
         struct srp_event_struct *evt_struct;
-        
+        dma_addr_t addr;
+
         evt_struct = get_event_struct(&hostdata->pool);
         if (!evt_struct) {
                 printk(KERN_ERR "ibmvscsi: couldn't allocate an event "
@@ -757,10 +758,10 @@ static void send_mad_adapter_info(struct ibmvscsi_host_data *hostdata)
         
         req->common.type = VIOSRP_ADAPTER_INFO_TYPE;
         req->common.length = sizeof(hostdata->madapter_info);
-        req->buffer = dma_map_single(hostdata->dev,
-                                     &hostdata->madapter_info,
-                                     sizeof(hostdata->madapter_info),
-                                     DMA_BIDIRECTIONAL);
+        req->buffer = addr = dma_map_single(hostdata->dev,
+                                            &hostdata->madapter_info,
+                                            sizeof(hostdata->madapter_info),
+                                            DMA_BIDIRECTIONAL);
 
         if (dma_mapping_error(req->buffer)) {
                 printk(KERN_ERR
@@ -770,8 +771,13 @@ static void send_mad_adapter_info(struct ibmvscsi_host_data *hostdata)
                 return;
         }
         
-        if (ibmvscsi_send_srp_event(evt_struct, hostdata))
+        if (ibmvscsi_send_srp_event(evt_struct, hostdata)) {
                 printk(KERN_ERR "ibmvscsi: couldn't send ADAPTER_INFO_REQ!\n");
+                dma_unmap_single(hostdata->dev,
+                                 addr,
+                                 sizeof(hostdata->madapter_info),
+                                 DMA_BIDIRECTIONAL);
+        }
 };
 
 /**
@@ -1259,6 +1265,7 @@ static int ibmvscsi_do_host_config(struct ibmvscsi_host_data *hostdata,
 {
         struct viosrp_host_config *host_config;
         struct srp_event_struct *evt_struct;
+        dma_addr_t addr;
         int rc;
 
         evt_struct = get_event_struct(&hostdata->pool);
@@ -1279,8 +1286,9 @@ static int ibmvscsi_do_host_config(struct ibmvscsi_host_data *hostdata,
         memset(host_config, 0x00, sizeof(*host_config));
         host_config->common.type = VIOSRP_HOST_CONFIG_TYPE;
         host_config->common.length = length;
-        host_config->buffer = dma_map_single(hostdata->dev, buffer, length,
-                                            DMA_BIDIRECTIONAL);
+        host_config->buffer = addr = dma_map_single(hostdata->dev, buffer,
+                                                    length,
+                                                    DMA_BIDIRECTIONAL);
 
         if (dma_mapping_error(host_config->buffer)) {
                 printk(KERN_ERR
@@ -1291,11 +1299,9 @@ static int ibmvscsi_do_host_config(struct ibmvscsi_host_data *hostdata,
 
         init_completion(&evt_struct->comp);
         rc = ibmvscsi_send_srp_event(evt_struct, hostdata);
-        if (rc == 0) {
+        if (rc == 0)
                 wait_for_completion(&evt_struct->comp);
-                dma_unmap_single(hostdata->dev, host_config->buffer,
-                                 length, DMA_BIDIRECTIONAL);
-        }
+        dma_unmap_single(hostdata->dev, addr, length, DMA_BIDIRECTIONAL);
 
         return rc;
 }