Re: [Qemu-devel] [PATCH for 1.3] pflash_cfi01: Suppress warning when Linux probes for AMD flash

[walimis <walimisdev@gmail.com>]

On Sat, Nov 24, 2012 at 11:03:13PM +0100, Stefan Weil wrote:
>There are several ARM and MIPS boards which are manufactured with
>either Intel (pflash_cfi01.c) or AMD (pflash_cfi02.c) flash memory.
>
>The Linux kernel supports both and first probes for AMD flash which
>resulted in one or two warnings from the Intel flash emulation:
>
>pflash_write: Unimplemented flash cmd sequence (offset 0000000000000000, wcycle 0x0 cmd 0x0 value 0xf000f0)
>pflash_write: Unimplemented flash cmd sequence (offset 0000000000000000, wcycle 0x0 cmd 0x0 value 0xf0)

Hi Stefan,

I ever submited a similar patch to mailing list:
http://patchwork.ozlabs.org/patch/147886/

Do you have a look at that patch to see whether it's sane for the
different parts between mine and yours?

Thanks,
Liming Wang

>
>These warnings confuse users, so suppress them.
>
>Signed-off-by: Stefan Weil <sw@weilnetz.de>
>---
>
>This is strictly speaking not a bug fix, but it fixes a warning
>which confuses QEMU users since a long time (see previous mails
>on qemu-devel and bug report).
>
>It is also safe. Therefore I think it can be applied to 1.3.
>
>Regards
>Stefan
>
> hw/pflash_cfi01.c |    3 +++
> 1 file changed, 3 insertions(+)
>
>diff --git a/hw/pflash_cfi01.c b/hw/pflash_cfi01.c
>index 7d040b5..a4dbe19 100644
>--- a/hw/pflash_cfi01.c
>+++ b/hw/pflash_cfi01.c
>@@ -319,6 +319,9 @@ static void pflash_write(pflash_t *pfl, hwaddr offset,
>             DPRINTF("%s: Write to buffer\n", __func__);
>             pfl->status |= 0x80; /* Ready! */
>             break;
>+        case 0xf0: /* Probe for AMD flash */
>+            DPRINTF("%s: Probe for AMD flash\n", __func__);
>+            goto reset_flash;
>         case 0xff: /* Read array mode */
>             DPRINTF("%s: Read array mode\n", __func__);
>             goto reset_flash;
>-- 
>1.7.10.4
>
>