linux-kernel - [PATCH 1/4] cp210x: Replace USB magic numbers with symbolic names

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Date:	Fri, 24 Jul 2015 08:48:08 +0200
From:	Petr Tesarik <ptesarik@...e.com>
To:	Johan Hovold <johan@...nel.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	Petr Tesarik <ptesarik@...e.com>,
	linux-usb@...r.kernel.org (open list:USB SERIAL SUBSYSTEM),
	linux-kernel@...r.kernel.org (open list),
	Petr Tesarik <ptesarik@...e.cz>
Subject: [PATCH 1/4] cp210x: Replace USB magic numbers with symbolic names

From: Petr Tesarik <ptesarik@...e.cz>

The request type is in fact made of three fields that already have
symbolic constants.

While I was rewriting those lines, I also converted the pre-processor
defines into an enum, so they are seen by debuggers.

Signed-off-by: Petr Tesarik <ptesarik@...e.com>
---
 drivers/usb/serial/cp210x.c | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/drivers/usb/serial/cp210x.c b/drivers/usb/serial/cp210x.c
index eac7cca..1bae015 100644
--- a/drivers/usb/serial/cp210x.c
+++ b/drivers/usb/serial/cp210x.c
@@ -226,10 +226,16 @@ static struct usb_serial_driver * const serial_drivers[] = {
 };
 
 /* Config request types */
-#define REQTYPE_HOST_TO_INTERFACE	0x41
-#define REQTYPE_INTERFACE_TO_HOST	0xc1
-#define REQTYPE_HOST_TO_DEVICE	0x40
-#define REQTYPE_DEVICE_TO_HOST	0xc0
+enum cp210x_request_type {
+	REQTYPE_HOST_TO_INTERFACE =
+		USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_INTERFACE,
+	REQTYPE_INTERFACE_TO_HOST =
+		USB_DIR_IN  | USB_TYPE_VENDOR | USB_RECIP_INTERFACE,
+	REQTYPE_HOST_TO_DEVICE =
+		USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+	REQTYPE_DEVICE_TO_HOST =
+		USB_DIR_IN  | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+};
 
 /* Config request codes */
 #define CP210X_IFC_ENABLE	0x00
-- 
2.1.4

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