Merge branch 'for-next' of git://git.samba.org/sfrench/cifs-2.6

Pull CIFS fixes from Steve French:
 "Three cifs/smb3 fixes - including two for stable"

* 'for-next' of git://git.samba.org/sfrench/cifs-2.6:
  cifs: don't check for failure from mempool_alloc()
  Do not return number of bytes written for ioctl CIFS_IOC_COPYCHUNK_FILE
  Fix match_prepath()

fs/cifs/connect.c

@@ -2912,16 +2912,14 @@ match_prepath(struct super_block *sb, struct cifs_mnt_data *mnt_data)
 {
 	struct cifs_sb_info *old = CIFS_SB(sb);
 	struct cifs_sb_info *new = mnt_data->cifs_sb;
+	bool old_set = old->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH;
+	bool new_set = new->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH;
 
-	if (old->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH) {
-		if (!(new->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH))
-			return 0;
-		/* The prepath should be null terminated strings */
-		if (strcmp(new->prepath, old->prepath))
-			return 0;
-
+	if (old_set && new_set && !strcmp(new->prepath, old->prepath))
 		return 1;
-	}
+	else if (!old_set && !new_set)
+		return 1;
+
 	return 0;
 }
 

fs/cifs/ioctl.c

@@ -74,7 +74,8 @@ static long cifs_ioctl_copychunk(unsigned int xid, struct file *dst_file,
 
 	rc = cifs_file_copychunk_range(xid, src_file.file, 0, dst_file, 0,
 					src_inode->i_size, 0);
-
+	if (rc > 0)
+		rc = 0;
 out_fput:
 	fdput(src_file);
 out_drop_write:

fs/cifs/misc.c

@@ -167,13 +167,11 @@ cifs_buf_get(void)
 
 	/* clear the first few header bytes */
 	/* for most paths, more is cleared in header_assemble */
-	if (ret_buf) {
 	memset(ret_buf, 0, buf_size + 3);
 	atomic_inc(&bufAllocCount);
 #ifdef CONFIG_CIFS_STATS2
 	atomic_inc(&totBufAllocCount);
 #endif /* CONFIG_CIFS_STATS2 */
-	}
 
 	return ret_buf;
 }
@@ -201,7 +199,6 @@ cifs_small_buf_get(void)
    albeit slightly larger than necessary and maxbuffersize
    defaults to this and can not be bigger */
 	ret_buf = mempool_alloc(cifs_sm_req_poolp, GFP_NOFS);
-	if (ret_buf) {
 	/* No need to clear memory here, cleared in header assemble */
 	/*	memset(ret_buf, 0, sizeof(struct smb_hdr) + 27);*/
 	atomic_inc(&smBufAllocCount);
@@ -209,7 +206,6 @@ cifs_small_buf_get(void)
 	atomic_inc(&totSmBufAllocCount);
 #endif /* CONFIG_CIFS_STATS2 */
 
-	}
 	return ret_buf;
 }
 

fs/cifs/smb2transport.c

@@ -538,9 +538,6 @@ smb2_mid_entry_alloc(const struct smb2_sync_hdr *shdr,
 	}
 
 	temp = mempool_alloc(cifs_mid_poolp, GFP_NOFS);
-	if (temp == NULL)
-		return temp;
-	else {
 	memset(temp, 0, sizeof(struct mid_q_entry));
 	temp->mid = le64_to_cpu(shdr->MessageId);
 	temp->pid = current->pid;
@@ -554,7 +551,6 @@ smb2_mid_entry_alloc(const struct smb2_sync_hdr *shdr,
 	 */
 	temp->callback = cifs_wake_up_task;
 	temp->callback_data = current;
-	}
 
 	atomic_inc(&midCount);
 	temp->mid_state = MID_REQUEST_ALLOCATED;

fs/cifs/transport.c

@@ -55,9 +55,6 @@ AllocMidQEntry(const struct smb_hdr *smb_buffer, struct TCP_Server_Info *server)
 	}
 
 	temp = mempool_alloc(cifs_mid_poolp, GFP_NOFS);
-	if (temp == NULL)
-		return temp;
-	else {
 	memset(temp, 0, sizeof(struct mid_q_entry));
 	temp->mid = get_mid(smb_buffer);
 	temp->pid = current->pid;
@@ -74,7 +71,6 @@ AllocMidQEntry(const struct smb_hdr *smb_buffer, struct TCP_Server_Info *server)
 	 */
 	temp->callback = cifs_wake_up_task;
 	temp->callback_data = current;
-	}
 
 	atomic_inc(&midCount);
 	temp->mid_state = MID_REQUEST_ALLOCATED;