kernel: do preparation work for copyless read/write

2026-10-28 21:28:21 +00:00 · 2024-09-18 21:17:37 -03:00
parent 1140244816
commit 611f13b562
12 changed files with 134 additions and 47 deletions
@@ -122,6 +122,11 @@ static int read(int minor, void *buffer, size_t size, uintmax_t offset, int flag
 	}

 	*readc = ringbuffer_read(&mouse->packetbuffer, buffer, sizeof(mousepacket_t) * packetcount);
+	if (*readc == RINGBUFFER_USER_COPY_FAILED) {
+		error = EFAULT;
+		goto leave;
+	}
+
 	__assert(*readc);

 	leave: