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Re: [Qemu-devel] [PATCH 12/23] ide: Convert FLUSH CACHE to ide_cmd_table
From: |
Alex Williamson |
Subject: |
Re: [Qemu-devel] [PATCH 12/23] ide: Convert FLUSH CACHE to ide_cmd_table handler |
Date: |
Wed, 03 Jul 2013 15:41:16 -0600 |
On Mon, 2013-06-24 at 11:10 +0200, Stefan Hajnoczi wrote:
> From: Kevin Wolf <address@hidden>
>
> Signed-off-by: Kevin Wolf <address@hidden>
> Signed-off-by: Stefan Hajnoczi <address@hidden>
> ---
> hw/ide/core.c | 14 ++++++++------
> 1 file changed, 8 insertions(+), 6 deletions(-)
>
> diff --git a/hw/ide/core.c b/hw/ide/core.c
> index 8789758..83e86aa 100644
> --- a/hw/ide/core.c
> +++ b/hw/ide/core.c
> @@ -1184,6 +1184,12 @@ static bool cmd_write_dma(IDEState *s, uint8_t cmd)
> return false;
> }
>
> +static bool cmd_flush_cache(IDEState *s, uint8_t cmd)
> +{
> + ide_flush_cache(s);
> + return false;
> +}
> +
> static bool cmd_read_native_max(IDEState *s, uint8_t cmd)
> {
> bool lba48 = (cmd == WIN_READ_NATIVE_MAX_EXT);
> @@ -1345,8 +1351,8 @@ static const struct {
> [WIN_SETIDLE1] = { cmd_nop, ALL_OK },
> [WIN_CHECKPOWERMODE1] = { cmd_check_power_mode, ALL_OK | SET_DSC
> },
> [WIN_SLEEPNOW1] = { cmd_nop, ALL_OK },
> - [WIN_FLUSH_CACHE] = { NULL, ALL_OK },
> - [WIN_FLUSH_CACHE_EXT] = { NULL, HD_CFA_OK },
> + [WIN_FLUSH_CACHE] = { cmd_flush_cache, ALL_OK },
> + [WIN_FLUSH_CACHE_EXT] = { cmd_flush_cache, HD_CFA_OK },
> [WIN_IDENTIFY] = { cmd_identify, ALL_OK },
> [WIN_SETFEATURES] = { cmd_set_features, ALL_OK | SET_DSC },
> [IBM_SENSE_CONDITION] = { NULL, CFA_OK },
> @@ -1403,10 +1409,6 @@ void ide_exec_cmd(IDEBus *bus, uint32_t val)
> }
>
> switch(val) {
> - case WIN_FLUSH_CACHE:
> - case WIN_FLUSH_CACHE_EXT:
> - ide_flush_cache(s);
> - break;
> case WIN_SEEK:
> /* XXX: Check that seek is within bounds */
> s->status = READY_STAT | SEEK_STAT;
This also breaks win7 x64 q35 IDE. Note that while this change looks
like a no-op, filling in a handler now means that we do:
s->status = READY_STAT | BUSY_STAT;
before calling the handler and don't clear it on the way out since the
function statically returns false. This then introduces the same bug as
f68ec837. Thanks,
Alex
- Re: [Qemu-devel] [PATCH 12/23] ide: Convert FLUSH CACHE to ide_cmd_table handler,
Alex Williamson <=