linux-kernel - Re: [PATCH 3.14-stable] usb: gadget: f_fs: drop duplicate usb_functionfs_descs

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Date:	Fri, 5 Sep 2014 12:58:53 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	Karol Lewandowski <k.lewandowsk@...sung.com>
Cc:	linux-kernel@...r.kernel.org, lmctlx@...il.com,
	Michal Nazarewicz <mina86@...a86.com>,
	Felipe Balbi <balbi@...com>, stable@...r.kernel.org
Subject: Re: [PATCH 3.14-stable] usb: gadget: f_fs: drop duplicate
 usb_functionfs_descs_head declaration

On Fri, Sep 05, 2014 at 09:04:44PM +0200, Karol Lewandowski wrote:
> Applicable for 3.14-stable only.
> 
> This commit drops duplicate declaration of struct usb_functionfs_descs_head
> erronousely added in commit 28c5980b54 ("usb: gadget: f_fs: resurect
> usb_functionfs_descs_head structure").
> 
> Fix from 28c5980b54 is applicable only for v3.15-rc1 and newer kernels.
> 
> This fixes error in uapi:
> 
>   /src/linux$ make -C tools usb
> 
>   make: Entering directory '/src/linux/tools'
>     DESCEND  usb
>   make[1]: Entering directory '/src/linux/tools/usb'
>   gcc -Wall -Wextra -g -I../include -o testusb testusb.c -lpthread
>   gcc -Wall -Wextra -g -I../include -o ffs-test ffs-test.c -lpthread
>   In file included from ffs-test.c:41:0:
>   ../../include/uapi/linux/usb/functionfs.h:42:8: error: redefinition of ‘struct usb_functionfs_descs_head’
>    struct usb_functionfs_descs_head {
>           ^
>   ../../include/uapi/linux/usb/functionfs.h:31:8: note: originally defined here
>    struct usb_functionfs_descs_head {
>           ^
> 
> Cc: Michal Nazarewicz <mina86@...a86.com>
> Cc: Felipe Balbi <balbi@...com>
> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> Cc: stable@...r.kernel.org
> Signed-off-by: Karol Lewandowski <k.lewandowsk@...sung.com>
> ---
>  include/uapi/linux/usb/functionfs.h | 10 ++--------
>  1 file changed, 2 insertions(+), 8 deletions(-)
> 
> diff --git a/include/uapi/linux/usb/functionfs.h b/include/uapi/linux/usb/functionfs.h
> index 29e9c7a..f279394 100644
> --- a/include/uapi/linux/usb/functionfs.h
> +++ b/include/uapi/linux/usb/functionfs.h
> @@ -27,24 +27,18 @@ struct usb_endpoint_descriptor_no_audio {
>  	__u8  bInterval;
>  } __attribute__((packed));
>  
> -/* Legacy format, deprecated as of 3.14. */
> -struct usb_functionfs_descs_head {
> -	__le32 magic;
> -	__le32 length;
> -	__le32 fs_count;
> -	__le32 hs_count;
> -} __attribute__((packed, deprecated));
>  
>  /*
>   * All numbers must be in little endian order.
>   */
>  
> +/* Legacy format, deprecated as of 3.14. */
>  struct usb_functionfs_descs_head {
>  	__le32 magic;
>  	__le32 length;
>  	__le32 fs_count;
>  	__le32 hs_count;
> -} __attribute__((packed));
> +} __attribute__((packed, deprecated));
>  
>  /*
>   * Descriptors format:
> -- 
> 2.0.1

Ah, well, instead I should just revert
28c5980b5494b8163d6cba5a5007b6ec7e63de66 as it shouldn't have gone to
3.14-stable, right?  I'll do that for the next round of stable releases
after this one.

thanks,

greg k-h
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