Re: [PATCH] hw/nvme: fix mo field in io mgnt send

[Klaus Jensen <its@irrelevant.dk>]

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On May  8 09:36, Vincent Fu wrote:
> On 5/7/24 10:05, Vincent Fu wrote:
> > On 5/6/24 04:06, Klaus Jensen wrote:
> > > The Management Operation field of I/O Management Send is only 8 bits,
> > > not 16.
> > > 
> > > Fixes: 73064edfb864 ("hw/nvme: flexible data placement emulation")
> > > Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
> > > ---
> > >   hw/nvme/ctrl.c | 2 +-
> > >   1 file changed, 1 insertion(+), 1 deletion(-)
> > > 
> > > diff --git a/hw/nvme/ctrl.c b/hw/nvme/ctrl.c
> > > index 9e7bbebc8bb0..ede5f281dd7c 100644
> > > --- a/hw/nvme/ctrl.c
> > > +++ b/hw/nvme/ctrl.c
> > > @@ -4387,7 +4387,7 @@ static uint16_t nvme_io_mgmt_send(NvmeCtrl *n,
> > > NvmeRequest *req)
> > >   {
> > >       NvmeCmd *cmd = &req->cmd;
> > >       uint32_t cdw10 = le32_to_cpu(cmd->cdw10);
> > > -    uint8_t mo = (cdw10 & 0xff);
> > > +    uint8_t mo = cdw10 & 0xf;
> > >       switch (mo) {
> > >       case NVME_IOMS_MO_NOP:
> > > 
> > > ---
> > > base-commit: 84b0eb1826f690aa8d51984644318ee6c810f5bf
> > > change-id: 20240506-fix-ioms-mo-97098c6c5396
> > > 
> > > Best regards,
> > 
> > Reviewed-by: Vincent Fu <vincent.fu@samsung.com>
> 
> Klaus, upon taking a second look, the original code is correct. The proposed
> change would only keep the least significant 4 bits of the MO field. The
> original code gives you the 8 bits needed.
> 
> Let me withdraw my Reviewed-by.
> 
> Vincent

That was embarrasing. Thanks for catching that Vincent :)

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