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Date: Tue, 30 Apr 2013 02:39:22 +0400
From: Maksim Ratnikov <m.o.ratnikov@gmail.com>
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Subject: Re: [Qemu-devel] [PATCH] Extend support of SMBUS(module pm_smbus.c)
 HST_STS register.
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To: Peter Maydell <peter.maydell@linaro.org>
Cc: qemu-devel@nongnu.org

29.04.2013 00:03, Peter Maydell пишет:
> On 28 April 2013 19:26, Maksim Ratnikov <m.o.ratnikov@gmail.com> wrote:
>> Previous realization doesn't consider flags in the status register.
>> Add DS and INTR bits of HST_STS register set after transaction execution.
>> Update bits resetting in HST_STS register. Update error processing: if
>> DEV_ERR bit are set
>> transaction isn't execution.
> Hi; thanks for this patch. A minor comment below...
>
>> Signed-off-by: Maksim_Ratnikov <m.o.ratnikov@gmail.com>
>> ---
>>   hw/i2c/pm_smbus.c |   13 ++++++++++++-
>>   1 files changed, 12 insertions(+), 1 deletions(-)
>>
>> diff --git a/hw/i2c/pm_smbus.c b/hw/i2c/pm_smbus.c
>> index 0b5bb89..d5f5c56 100644
>> --- a/hw/i2c/pm_smbus.c
>> +++ b/hw/i2c/pm_smbus.c
>> @@ -50,9 +50,16 @@ static void smb_transaction(PMSMBus *s)
>>       i2c_bus *bus = s->smbus;
>>
>>       SMBUS_DPRINTF("SMBus trans addr=0x%02x prot=0x%02x\n", addr, prot);
>> +    /* Transaction isn't exec if DEV_ERR bit set */
>> +    if ((s->smb_stat & 0x04) != 0)
>> +        goto error;
> QEMU coding style requires braces on this if(). (You can run
> your patch through scripts/codingstyle.pl to check for this
> kind of thing.)
>
>>       switch(prot) {
>>       case 0x0:
>>           smbus_quick_command(bus, addr, read);
>> +        /* Set successfully transaction end:
>> +         * ByteDoneStatus = 1 (HST_STS bit #7) and INTR = 1 (HST_STS bit
>> #1)
>> +         */
>> +        s->smb_stat |= 0x82;
> I think it would be nicer to define some constants for the
> HST_STS bits. Then you could write
>             s->smb_stat |= STS_BYTE_DONE | STS_INTR;
>
> and you wouldn't need to have the comment here explaining
> the magic numbers. (feel free to pick better constant names,
> ideally ones matching whatever the datasheet uses.)
> (then you can use the constants for all the smb_stat uses).
>
> thanks
> -- PMM
Thank you for your answer. I made some correction and sent new version 
of patch. I can't find script codingstyle.pl, but I use checkpatch.pl .  
It shows 0 error and 0 warning.