Re: [Qemu-devel] [PATCH] sh4: Fix serial line access for Linux kernels later than 3.2

[Guenter Roeck]

On 09/08/2013 12:39 AM, Guenter Roeck wrote:

With Linux kernel version 3.3 or later, qemu fails with the following message:

sh_serial: unsupported read from 0x18
   Aborted

Reported-and-analyzed-by: Rob Landley <r...@landley.net>
Signed-off-by: Guenter Roeck <li...@roeck-us.net>

ping ...

---
See http://lists.nongnu.org/archive/html/qemu-devel/2012-07/msg03870.html
for Rob's analysis of the problem. Unfortunately, the patch never made it
into qemu.

  hw/char/sh_serial.c |    2 --
  1 file changed, 2 deletions(-)

diff --git a/hw/char/sh_serial.c b/hw/char/sh_serial.c
index 6223a55..9328dd1 100644
--- a/hw/char/sh_serial.c
+++ b/hw/char/sh_serial.c
@@ -248,11 +248,9 @@ static uint64_t sh_serial_read(void *opaque, hwaddr offs,
                      s->flags &= ~SH_SERIAL_FLAG_RDF;
              }
              break;
-#if 0
          case 0x18:
              ret = s->fcr;
              break;
-#endif
          case 0x1c:
              ret = s->rx_cnt;
              break;