linux-kernel - Re: [PATCH v4 12/16] perf header: add a buffer to struct feat

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Date:   Tue, 13 Jun 2017 18:54:14 -0700
From:   David Carrillo-Cisneros <davidcc@...gle.com>
To:     Jiri Olsa <jolsa@...hat.com>
Cc:     linux-kernel <linux-kernel@...r.kernel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Andi Kleen <ak@...ux.intel.com>, Simon Que <sque@...omium.org>,
        Wang Nan <wangnan0@...wei.com>, Jiri Olsa <jolsa@...nel.org>,
        He Kuang <hekuang@...wei.com>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Stephane Eranian <eranian@...gle.com>,
        Paul Turner <pjt@...gle.com>
Subject: Re: [PATCH v4 12/16] perf header: add a buffer to struct feat_fd

On Tue, Jun 13, 2017 at 11:54 AM, Jiri Olsa <jolsa@...hat.com> wrote:
> On Mon, Jun 12, 2017 at 09:29:28PM -0700, David Carrillo-Cisneros wrote:
>
> SNIP
>
>>  /* Return: 0 if succeded, -ERR if failed. */
>>  int write_padded(struct feat_fd *ff, const void *bf,
>>                size_t count, size_t count_aligned)
>> @@ -125,13 +151,32 @@ static int do_write_string(struct feat_fd *ff, const char *str)
>>       return write_padded(ff, str, olen, len);
>>  }
>>
>> -static int __do_read(struct feat_fd *ff, void *addr, ssize_t size)
>> +static int __do_read_fd(struct feat_fd *ff, void *addr, ssize_t size)
>>  {
>> -     ssize_t ret = readn(ff->fd, addr, size);
>> +             ssize_t ret = readn(ff->fd, addr, size);
>> +
>> +             if (ret != size)
>> +                     return ret < 0 ? (int)ret : -1;
>> +             return 0;
>
> extra tab in indent

fixed