On Mon, 08 Sep 2014, Octavian Purdila wrote:
> On Mon, Sep 8, 2014 at 7:30 PM, Johan Hovold <johan@xxxxxxxxxx> wrote:
> > On Mon, Sep 08, 2014 at 06:57:29PM +0300, Octavian Purdila wrote:
> >> On Mon, Sep 8, 2014 at 5:44 PM, Johan Hovold <johan@xxxxxxxxxx> wrote:
> >>
> >> <snip>
> >>
> >> Hi Johan,
> >>
> >> Again, thanks for the detailed review, I am addressing your review
> >> comments as we speak. Some questions below.
> >>
> >> <snip>
> >>
> >> > > + int ret, len;
> >> > > + struct tx_data {
> >> > > + u8 port;
> >> > > + u8 addr;
> >> > > + u8 mem_addr_len;
> >> > > + __le32 mem_addr;
> >> > > + __le16 buf_len;
> >> > > + u8 buf[DLN2_I2C_MAX_XFER_SIZE];
> >> > > + } __packed tx;
> >> >
> >> > Allocate these buffers dynamically (possibly at probe).
> >> >
> >>
> >> I double checked this, and DLN2_I2C_MAX_XFER_SIZE should actually be <
> >> 64 as the USB endpoint configuration max packet size is 64. In this
> >> case, can we keep it on the stack?
> >
> > It's better to lift that restriction and allocate it dynamically. Using
> > larger buffers (> EP size) is also more efficient.
> >
> >> <snip>
> >>
> >> > > + int ret, buf_len, rx_len = sizeof(rx);
> >> >
> >> > Again, one declaration per line.
> >>
> >> AFAICS there are many places where declaration on the same line
> >> (initialization included) are used. When did this became a coding
> >> style issue?
> >
> > It's ugly, hurts readability, and can also obfuscate the fact that your
> > function really needs to be refactored.
> >
> > And it's in the CodingStyle:
> >
> > "To this end, use just one data declaration per line (no commas
> > for multiple data declarations)."
> >
>
> OK, I always thought that was for when declaring structures/unions.
> Just one more question on this subject: is the following allowed:
>
> int ret, len;
>
> or should it be:
>
> int ret;
> int len;
Common sense usually prevails here. I sometimes bunch up the really
simple/obvious/throw-away variables like; i, j, k, ret, val etc,
especially when there are a lot of variables in use, but it's nicer to
see the less used, more complex ones on separate lines.
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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