diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index b9df855..5d39129 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -3740,7 +3740,7 @@
 
 	if (!ses->binding) {
 		ses->capabilities = server->capabilities;
-		if (linuxExtEnabled == 0)
+		if (!linuxExtEnabled)
 			ses->capabilities &= (~server->vals->cap_unix);
 
 		if (ses->auth_key.response) {
diff --git a/fs/cifs/dfs_cache.c b/fs/cifs/dfs_cache.c
index 6ad6ba5..0fdb0de 100644
--- a/fs/cifs/dfs_cache.c
+++ b/fs/cifs/dfs_cache.c
@@ -1260,7 +1260,8 @@
 	vi = find_vol(fullpath);
 	spin_unlock(&vol_list_lock);
 
-	kref_put(&vi->refcnt, vol_release);
+	if (!IS_ERR(vi))
+		kref_put(&vi->refcnt, vol_release);
 }
 
 /**
diff --git a/fs/cifs/fs_context.c b/fs/cifs/fs_context.c
index 0afccbb..076bcad 100644
--- a/fs/cifs/fs_context.c
+++ b/fs/cifs/fs_context.c
@@ -303,8 +303,6 @@
 int
 smb3_fs_context_dup(struct smb3_fs_context *new_ctx, struct smb3_fs_context *ctx)
 {
-	int rc = 0;
-
 	memcpy(new_ctx, ctx, sizeof(*ctx));
 	new_ctx->prepath = NULL;
 	new_ctx->mount_options = NULL;
@@ -327,7 +325,7 @@
 	DUP_CTX_STR(nodename);
 	DUP_CTX_STR(iocharset);
 
-	return rc;
+	return 0;
 }
 
 static int
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index 067eb44..794fc3b 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -3248,7 +3248,7 @@
 	free_rsp_buf(resp_buftype, rsp);
 
 	/* retry close in a worker thread if this one is interrupted */
-	if (rc == -EINTR) {
+	if (is_interrupt_error(rc)) {
 		int tmp_rc;
 
 		tmp_rc = smb2_handle_cancelled_close(tcon, persistent_fid,
diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h
index 204a622..d85edf5 100644
--- a/fs/cifs/smb2pdu.h
+++ b/fs/cifs/smb2pdu.h
@@ -424,7 +424,7 @@
 	__le16	TransformCount;
 	__u16	Reserved1;
 	__u32	Reserved2;
-	__le16	RDMATransformIds[1];
+	__le16	RDMATransformIds[];
 } __packed;
 
 /* Signing algorithms */