linux-kernel - [PATCHv4 1/6] usb: gadget: f_fs: resurect usb_functionfs_descs

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Date:	Fri, 13 Jun 2014 15:38:04 +0200
From:	Michal Nazarewicz <mina86@...a86.com>
To:	Felipe Balbi <balbi@...com>
Cc:	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
	"Lad, Prabhakar" <prabhakar.csengg@...il.com>,
	Krzysztof Opasiak <k.opasiak@...sung.com>,
	<stable@...r.kernel.org>, Michal Nazarewicz <mina86@...a86.com>
Subject: [PATCHv4 1/6] usb: gadget: f_fs: resurect usb_functionfs_descs_head structure

Even though usb_functionfs_descs_head structure is now deprecated,
it has been used by some user space tools.  Its removel in commit
[ac8dde1: “Add flags to descriptors block”] was an oversight
leading to build breakage for such tools.

Bring it back so that old user space tools can still be build
without problems on newer kernel versions.

Cc: <stable@...r.kernel.org>  # 3.14
Reported-by: Lad, Prabhakar <prabhakar.csengg@...il.com>
Reported-by: Krzysztof Opasiak <k.opasiak@...sung.com>
Signed-off-by: Michal Nazarewicz <mina86@...a86.com>
---
 include/uapi/linux/usb/functionfs.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/include/uapi/linux/usb/functionfs.h b/include/uapi/linux/usb/functionfs.h
index 2a4b4a7..24b68c5 100644
--- a/include/uapi/linux/usb/functionfs.h
+++ b/include/uapi/linux/usb/functionfs.h
@@ -33,6 +33,13 @@ 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));
 
 /*
  * Descriptors format:
-- 
2.0.0.526.g5318336

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