[PATCH] hvc_console: Separate the NUL character filtering from get_hvc_chars
Separate the NUL character filtering from get_hvc_chars.
Signed-off-by: Milton Miller <miltonm@bga.com>
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/drivers/char/hvc_vio.c b/drivers/char/hvc_vio.c
index 430a2c2..60bb915 100644
--- a/drivers/char/hvc_vio.c
+++ b/drivers/char/hvc_vio.c
@@ -43,8 +43,30 @@
};
MODULE_DEVICE_TABLE(vio, hvc_driver_table);
+static int filtered_get_chars(uint32_t vtermno, char *buf, int count)
+{
+ unsigned long got;
+ int i;
+
+ got = hvc_get_chars(vtermno, buf, count);
+
+ /*
+ * Work around a HV bug where it gives us a null
+ * after every \r. -- paulus
+ */
+ for (i = 1; i < got; ++i) {
+ if (buf[i] == 0 && buf[i-1] == '\r') {
+ --got;
+ if (i < got)
+ memmove(&buf[i], &buf[i+1],
+ got - i);
+ }
+ }
+ return got;
+}
+
static struct hv_ops hvc_get_put_ops = {
- .get_chars = hvc_get_chars,
+ .get_chars = filtered_get_chars,
.put_chars = hvc_put_chars,
};