From: Rasmus Villemoes <linux@rasmusvillemoes.dk>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
"Gustavo A. R. Silva" <gustavo@embeddedor.com>
Cc: Timur Tabi <timur@kernel.org>, Li Yang <leoyang.li@nxp.com>,
Anton Vorontsov <avorontsov@ru.mvista.com>,
kbuild test robot <lkp@intel.com>,
linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org,
Joe Perches <joe@perches.com>
Subject: Re: [PATCH] usb: host: fhci-hcd: annotate PIPE_CONTROL switch case with fallthrough
Date: Thu, 13 Feb 2020 14:35:18 +0100 [thread overview]
Message-ID: <6ab68169-dde6-b5ba-0909-fa685bd24aac@rasmusvillemoes.dk> (raw)
In-Reply-To: <20200213125659.GB3325929@kroah.com>
On 13/02/2020 13.56, Greg Kroah-Hartman wrote:
>> diff --git a/drivers/usb/host/fhci-hcd.c b/drivers/usb/host/fhci-hcd.c
>> index 04733876c9c6..a8e1048278d0 100644
>> --- a/drivers/usb/host/fhci-hcd.c
>> +++ b/drivers/usb/host/fhci-hcd.c
>> @@ -396,6 +396,7 @@ static int fhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
>> case PIPE_CONTROL:
>> /* 1 td fro setup,1 for ack */
>> size = 2;
>> + fallthrough;
>
> We have an attribute for that?
>
> Shouldn't this be /* fall through */ instead?
>
> Gustavo, what's the best practice here, I count only a few
> "fallthrough;" instances in the kernel, although one is in our coding
> style document, and thousands of the /* */ version.
Yes, I went with the attribute/macro due to that, and the history is
that Linus applied Joe's patches directly
(https://lore.kernel.org/lkml/CAHk-=whOF8heTGz5tfzYUBp_UQQzSWNJ_50M7-ECXkfFRDQWFA@mail.gmail.com/),
so I assumed that meant the Penguin decided that the attribute/macro is
the right thing to do for new code, while existing comment annotations
can be left alone or changed piecemeal as code gets refactored anyway.
Rasmus
next prev parent reply other threads:[~2020-02-13 13:35 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-13 8:54 [PATCH] usb: host: fhci-hcd: annotate PIPE_CONTROL switch case with fallthrough Rasmus Villemoes
2020-02-13 12:56 ` Greg Kroah-Hartman
2020-02-13 13:35 ` Rasmus Villemoes [this message]
2020-02-13 15:23 ` [PATCH] checkpatch: Prefer fallthrough; over fallthrough comments Joe Perches
2020-02-17 9:38 ` [PATCH] usb: host: fhci-hcd: annotate PIPE_CONTROL switch case with fallthrough Greg Kroah-Hartman
2020-02-17 14:12 ` Rasmus Villemoes
2020-02-17 14:18 ` Greg Kroah-Hartman
2020-02-17 16:15 ` Gustavo A. R. Silva
2020-02-17 16:29 ` Greg Kroah-Hartman
2020-02-17 17:12 ` Gustavo A. R. Silva
2020-02-17 17:33 ` Joe Perches
2020-02-17 19:44 ` Rasmus Villemoes
2020-02-13 21:11 ` Leo Li
2020-02-17 17:28 ` Gustavo A. R. Silva
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