linux-kernel - [PATCH 09/14] RFC: usb/host/fotg210: Add function: output_buf_tds

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Message-Id: <1442847678-7970-10-git-send-email-peter.senna@gmail.com>
Date:	Mon, 21 Sep 2015 17:01:13 +0200
From:	Peter Senna Tschudin <peter.senna@...il.com>
To:	balbi@...com, stern@...land.harvard.edu,
	sergei.shtylyov@...entembedded.com, standby24x7@...il.com,
	pmladek@...e.cz, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org, gregkh@...uxfoundation.org
Cc:	Peter Senna Tschudin <peter.senna@...il.com>
Subject: [PATCH 09/14] RFC: usb/host/fotg210: Add function: output_buf_tds_dir()

checkpatch complains about too many leading tabs because the switch
statement starts after 6 tabs.

fill_periodic_buffer() -> for() -> do -> switch() -> if() ->
list_for_each_entry() and finally the last switch().

This patch moves the list_for_each_entry() and the last switch() to a
new inline function named output_buf_tds_dir(). This change makes the
code easier to read and calm down checkpatch. This patch changes it to:

fill_periodic_buffer() -> for() -> do -> switch() -> if() ->
output_buf_tds_dir()

Signed-off-by: Peter Senna Tschudin <peter.senna@...il.com>
---
 drivers/usb/host/fotg210-hcd.c | 64 ++++++++++++++++++++++--------------------
 1 file changed, 33 insertions(+), 31 deletions(-)

diff --git a/drivers/usb/host/fotg210-hcd.c b/drivers/usb/host/fotg210-hcd.c
index 82cd5da..13cca41 100644
--- a/drivers/usb/host/fotg210-hcd.c
+++ b/drivers/usb/host/fotg210-hcd.c
@@ -497,6 +497,36 @@ static ssize_t fill_async_buffer(struct debug_buffer *buf)
 	return strlen(buf->output_buf);
 }
 
+/* count tds, get ep direction */
+static inline unsigned output_buf_tds_dir(char *buf,
+					  struct fotg210_hcd *fotg210,
+					  struct fotg210_qh_hw *hw,
+					  struct fotg210_qh *qh, unsigned size)
+{
+	u32 scratch = hc32_to_cpup(fotg210, &hw->hw_info1);
+	struct fotg210_qtd *qtd;
+	char *type = "";
+	unsigned temp = 0;
+
+	/* count tds, get ep direction */
+	list_for_each_entry(qtd, &qh->qtd_list, qtd_list) {
+		temp++;
+		switch (0x03 & (hc32_to_cpu(fotg210, qtd->hw_token) >> 8)) {
+		case 0:
+			type = "out";
+			continue;
+		case 1:
+			type = "in";
+			continue;
+		}
+	}
+
+	return scnprintf(buf, size, "(%c%d ep%d%s [%d/%d] q%d p%d)",
+			 speed_char(scratch), scratch & 0x007f,
+			 (scratch >> 8) & 0x000f, type, qh->usecs,
+			 qh->c_usecs, temp, 0x7ff & (scratch >> 16));
+}
+
 #define DBG_SCHED_LIMIT 64
 static ssize_t fill_periodic_buffer(struct debug_buffer *buf)
 {
@@ -568,37 +598,9 @@ static ssize_t fill_periodic_buffer(struct debug_buffer *buf)
 				}
 				/* show more info the first time around */
 				if (temp == seen_count) {
-					u32 scratch = hc32_to_cpup(fotg210,
-								&hw->hw_info1);
-					struct fotg210_qtd *qtd;
-					char *type = "";
-
-					/* count tds, get ep direction */
-					temp = 0;
-					list_for_each_entry(qtd,
-							&p.qh->qtd_list,
-							qtd_list) {
-						temp++;
-						switch (0x03 & (hc32_to_cpu(
-							fotg210,
-							qtd->hw_token) >> 8)) {
-						case 0:
-							type = "out";
-							continue;
-						case 1:
-							type = "in";
-							continue;
-						}
-					}
-
-					temp = scnprintf(next, size,
-						"(%c%d ep%d%s [%d/%d] q%d p%d)",
-						speed_char(scratch),
-						scratch & 0x007f,
-						(scratch >> 8) & 0x000f, type,
-						p.qh->usecs, p.qh->c_usecs,
-						temp,
-						0x7ff & (scratch >> 16));
+					temp = output_buf_tds_dir(next,
+								  fotg210, hw,
+								  p.qh, size);
 
 					if (seen_count < DBG_SCHED_LIMIT)
 						seen[seen_count++].qh = p.qh;
-- 
2.1.0

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