linux-kernel - Re: [PATCH] USB-FHCI: Use a signed return type for fhci_create

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Date:	Sat, 19 Dec 2015 23:46:26 +0300
From:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:	SF Markus Elfring <elfring@...rs.sourceforge.net>,
	linux-usb@...r.kernel.org,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	kernel-janitors@...r.kernel.org,
	Julia Lawall <julia.lawall@...6.fr>
Subject: Re: [PATCH] USB-FHCI: Use a signed return type for fhci_create_ep()

Hello.

On 12/19/2015 11:15 PM, SF Markus Elfring wrote:

> From: Markus Elfring <elfring@...rs.sourceforge.net>
> Date: Sat, 19 Dec 2015 21:10:20 +0100
>
> The return type "u32" was used by the fhci_create_ep() function even though
> it will eventually return a negative error code.
> Improve this implementation detail by using the type "s32" instead.
>
> This issue was detected by using the Coccinelle software.
>
> Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
> ---
>   drivers/usb/host/fhci-tds.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/usb/host/fhci-tds.c b/drivers/usb/host/fhci-tds.c
> index f82ad5d..c1ae172 100644
> --- a/drivers/usb/host/fhci-tds.c
> +++ b/drivers/usb/host/fhci-tds.c
> @@ -149,7 +149,7 @@ void fhci_ep0_free(struct fhci_usb *usb)
>    * data_mem	The data memory partition(BUS)
>    * ring_len	TD ring length
>    */
> -u32 fhci_create_ep(struct fhci_usb *usb, enum fhci_mem_alloc data_mem,
> +s32 fhci_create_ep(struct fhci_usb *usb, enum fhci_mem_alloc data_mem,

    Should be just *int*, I think.

[...]

MBR, Sergei

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