Staging: hv: vmbus: Cleanup some error values in channel.c

Cleanup some error values in channel.c.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Abhishek Kane <v-abkane@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/staging/hv/channel.c b/drivers/staging/hv/channel.c
index 1833f27..21f1efc 100644
--- a/drivers/staging/hv/channel.c
+++ b/drivers/staging/hv/channel.c
@@ -811,7 +811,7 @@
 
 		pr_err("Buffer too small - got %d needs %d\n",
 			   bufferlen, userlen);
-		return -1;
+		return -ETOOSMALL;
 	}
 
 	*requestid = desc.trans_id;