linux-kernel - [PATCH v2 4/5] usb:common Simplify usb_decode_get_set

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Message-ID: <1545577992-4013-5-git-send-email-pawell@cadence.com>
Date:   Sun, 23 Dec 2018 15:13:11 +0000
From:   Pawel Laszczak <pawell@...ence.com>
To:     <devicetree@...r.kernel.org>
CC:     <gregkh@...uxfoundation.org>, <mark.rutland@....com>,
        <linux-usb@...r.kernel.org>, <hdegoede@...hat.com>,
        <heikki.krogerus@...ux.intel.com>, <andy.shevchenko@...il.com>,
        <robh+dt@...nel.org>, <rogerq@...com>,
        <linux-kernel@...r.kernel.org>, <adouglas@...ence.com>,
        <jbergsagel@...com>, <nsekhar@...com>, <nm@...com>,
        <sureshp@...ence.com>, <peter.chen@....com>, <pjez@...ence.com>,
        <kurahul@...ence.com>, Pawel Laszczak <pawell@...ence.com>
Subject: [PATCH v2 4/5] usb:common Simplify usb_decode_get_set_descriptor function.

Patch moves switch responsible for decoding descriptor type
outside snprintf. It's little improves code readability.

Signed-off-by: Pawel Laszczak <pawell@...ence.com>
---
 drivers/usb/common/debug.c | 111 +++++++++++++++++++------------------
 1 file changed, 57 insertions(+), 54 deletions(-)

diff --git a/drivers/usb/common/debug.c b/drivers/usb/common/debug.c
index 77e565a38f29..c15fa066339c 100644
--- a/drivers/usb/common/debug.c
+++ b/drivers/usb/common/debug.c
@@ -104,62 +104,65 @@ static void usb_decode_get_set_descriptor(__u8 bRequestType, __u8 bRequest,
 					  __u16 wValue, __u16 wIndex,
 					  __u16 wLength, char *str)
 {
+	char *s;
+
+	switch (wValue >> 8) {
+	case USB_DT_DEVICE:
+		s = "Device";
+		break;
+	case USB_DT_CONFIG:
+		s = "Configuration";
+		break;
+	case USB_DT_STRING:
+		s = "String";
+		break;
+	case USB_DT_INTERFACE:
+		s = "Interface";
+		break;
+	case USB_DT_ENDPOINT:
+		s = "Endpoint";
+		break;
+	case USB_DT_DEVICE_QUALIFIER:
+		s = "Device Qualifier";
+		break;
+	case USB_DT_OTHER_SPEED_CONFIG:
+		s = "Other Speed Config";
+		break;
+	case USB_DT_INTERFACE_POWER:
+		s = "Interface Power";
+		break;
+	case USB_DT_OTG:
+		s = "OTG";
+		break;
+	case USB_DT_DEBUG:
+		s = "Debug";
+		break;
+	case USB_DT_INTERFACE_ASSOCIATION:
+		s = "Interface Association";
+		break;
+	case USB_DT_BOS:
+		s = "BOS";
+		break;
+	case USB_DT_DEVICE_CAPABILITY:
+		s = "Device Capability";
+		break;
+	case USB_DT_PIPE_USAGE:
+		s = "Pipe Usage";
+		break;
+	case USB_DT_SS_ENDPOINT_COMP:
+		s = "SS Endpoint Companion";
+		break;
+	case USB_DT_SSP_ISOC_ENDPOINT_COMP:
+		s = "SSP Isochronous Endpoint Companion";
+		break;
+	default:
+		s = "UNKNOWN";
+		break;
+	}
+
 	sprintf(str, "%s %s Descriptor(Index = %d, Length = %d)",
 		bRequest == USB_REQ_GET_DESCRIPTOR ? "Get" : "Set",
-		({ char *s;
-			switch (wValue >> 8) {
-			case USB_DT_DEVICE:
-				s = "Device";
-				break;
-			case USB_DT_CONFIG:
-				s = "Configuration";
-				break;
-			case USB_DT_STRING:
-				s = "String";
-				break;
-			case USB_DT_INTERFACE:
-				s = "Interface";
-				break;
-			case USB_DT_ENDPOINT:
-				s = "Endpoint";
-				break;
-			case USB_DT_DEVICE_QUALIFIER:
-				s = "Device Qualifier";
-				break;
-			case USB_DT_OTHER_SPEED_CONFIG:
-				s = "Other Speed Config";
-				break;
-			case USB_DT_INTERFACE_POWER:
-				s = "Interface Power";
-				break;
-			case USB_DT_OTG:
-				s = "OTG";
-				break;
-			case USB_DT_DEBUG:
-				s = "Debug";
-				break;
-			case USB_DT_INTERFACE_ASSOCIATION:
-				s = "Interface Association";
-				break;
-			case USB_DT_BOS:
-				s = "BOS";
-				break;
-			case USB_DT_DEVICE_CAPABILITY:
-				s = "Device Capability";
-				break;
-			case USB_DT_PIPE_USAGE:
-				s = "Pipe Usage";
-				break;
-			case USB_DT_SS_ENDPOINT_COMP:
-				s = "SS Endpoint Companion";
-				break;
-			case USB_DT_SSP_ISOC_ENDPOINT_COMP:
-				s = "SSP Isochronous Endpoint Companion";
-				break;
-			default:
-				s = "UNKNOWN";
-				break;
-			} s; }), wValue & 0xff, wLength);
+		s, wValue & 0xff, wLength);
 }
 
 static void usb_decode_get_configuration(__u16 wLength, char *str)
-- 
2.17.1