linux-kernel - [PATCH v2] usb: storage: use usb_store_dbg instead of US

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Message-ID: <20160217184237.GA125188@printesoi1.mtv.corp.google.com>
Date:	Wed, 17 Feb 2016 10:42:37 -0800
From:	Victor Dodon <printesoi@...omium.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Matthew Dharm <mdharm-usb@...-eyed-alien.net>,
	linux-usb@...r.kernel.org, usb-storage@...ts.one-eyed-alien.net,
	Gwendal Grignou <gwendal@...omium.org>
Subject: [PATCH v2] usb: storage: use usb_store_dbg instead of US_DEBUGPX

The US_DEBUGPX macro uses printk without specifying a kernel log level, so
the default kernel log level is used, which may not match LOGLEVEL_DEBUG
used in usb_stor_dbg. Remove the macro and use usb_store_dbg instead.

Signed-off-by: Victor Dodon <printesoi@...omium.org>
--
Changes in v2:
  - Completely remove the macro instead of using printk_emit
  - Change all uses of US_DEBUGPX to usb_stor_dbg
---
 drivers/usb/storage/debug.c  | 12 ++++--------
 drivers/usb/storage/debug.h  |  3 ---
 drivers/usb/storage/sddr09.c | 18 +++++++++---------
 3 files changed, 13 insertions(+), 20 deletions(-)

diff --git a/drivers/usb/storage/debug.c b/drivers/usb/storage/debug.c
index 57bf3ad..5a12c03 100644
--- a/drivers/usb/storage/debug.c
+++ b/drivers/usb/storage/debug.c
@@ -57,7 +57,6 @@
 void usb_stor_show_command(const struct us_data *us, struct scsi_cmnd *srb)
 {
 	char *what = NULL;
-	int i;
 
 	switch (srb->cmnd[0]) {
 	case TEST_UNIT_READY: what = "TEST_UNIT_READY"; break;
@@ -153,10 +152,8 @@ void usb_stor_show_command(const struct us_data *us, struct scsi_cmnd *srb)
 	default: what = "(unknown command)"; break;
 	}
 	usb_stor_dbg(us, "Command %s (%d bytes)\n", what, srb->cmd_len);
-	usb_stor_dbg(us, "bytes: ");
-	for (i = 0; i < srb->cmd_len && i < 16; i++)
-		US_DEBUGPX(" %02x", srb->cmnd[i]);
-	US_DEBUGPX("\n");
+	usb_stor_dbg(us, "bytes: %*ph\n", min_t(int, srb->cmd_len, 16),
+		     (const unsigned char *)srb->cmnd);
 }
 
 void usb_stor_show_sense(const struct us_data *us,
@@ -174,11 +171,10 @@ void usb_stor_show_sense(const struct us_data *us,
 	if (what == NULL)
 		what = "(unknown ASC/ASCQ)";
 
-	usb_stor_dbg(us, "%s: ", keystr);
 	if (fmt)
-		US_DEBUGPX("%s (%s%x)\n", what, fmt, ascq);
+		usb_stor_dbg(us, "%s: %s (%s%x)\n", keystr, what, fmt, ascq);
 	else
-		US_DEBUGPX("%s\n", what);
+		usb_stor_dbg(us, "%s: %s\n", keystr, what);
 }
 
 void usb_stor_dbg(const struct us_data *us, const char *fmt, ...)
diff --git a/drivers/usb/storage/debug.h b/drivers/usb/storage/debug.h
index f525203..6b365ce 100644
--- a/drivers/usb/storage/debug.h
+++ b/drivers/usb/storage/debug.h
@@ -53,7 +53,6 @@ void usb_stor_show_sense(const struct us_data *us, unsigned char key,
 __printf(2, 3) void usb_stor_dbg(const struct us_data *us,
 				 const char *fmt, ...);
 
-#define US_DEBUGPX(fmt, ...)	printk(fmt, ##__VA_ARGS__)
 #define US_DEBUG(x)		x
 #else
 __printf(2, 3)
@@ -63,8 +62,6 @@ static inline void _usb_stor_dbg(const struct us_data *us,
 }
 #define usb_stor_dbg(us, fmt, ...)				\
 	do { if (0) _usb_stor_dbg(us, fmt, ##__VA_ARGS__); } while (0)
-#define US_DEBUGPX(fmt, ...)					\
-	do { if (0) printk(fmt, ##__VA_ARGS__); } while (0)
 #define US_DEBUG(x)
 #endif
 
diff --git a/drivers/usb/storage/sddr09.c b/drivers/usb/storage/sddr09.c
index b746036..79224fc 100644
--- a/drivers/usb/storage/sddr09.c
+++ b/drivers/usb/storage/sddr09.c
@@ -1102,24 +1102,24 @@ static int
 sddr09_get_wp(struct us_data *us, struct sddr09_card_info *info) {
 	int result;
 	unsigned char status;
+	const char *wp_fmt;
 
 	result = sddr09_read_status(us, &status);
 	if (result) {
 		usb_stor_dbg(us, "read_status fails\n");
 		return result;
 	}
-	usb_stor_dbg(us, "status 0x%02X", status);
 	if ((status & 0x80) == 0) {
 		info->flags |= SDDR09_WP;	/* write protected */
-		US_DEBUGPX(" WP");
+		wp_fmt = " WP";
+	} else {
+		wp_fmt = "";
 	}
-	if (status & 0x40)
-		US_DEBUGPX(" Ready");
-	if (status & LUNBITS)
-		US_DEBUGPX(" Suspended");
-	if (status & 0x1)
-		US_DEBUGPX(" Error");
-	US_DEBUGPX("\n");
+	usb_stor_dbg(us, "status 0x%02X%s%s%s%s\n", status, wp_fmt,
+		     status & 0x40 ? " Ready" : "",
+		     status & LUNBITS ? " Suspended" : "",
+		     status & 0x01 ? " Error" : "");
+
 	return 0;
 }
 
-- 
2.7.0.rc3.207.g0ac5344