From 09dae7fc57a010288875ef46a44e30d16cedd232 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sun, 31 Mar 2013 01:37:13 -0400
Subject: [PATCH] usb-storage: switch to ->show_info()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
 drivers/usb/storage/scsiglue.c | 42 ++++++++++++----------------------
 1 file changed, 14 insertions(+), 28 deletions(-)

diff --git a/drivers/usb/storage/scsiglue.c b/drivers/usb/storage/scsiglue.c
index 92f35abee92d..615c66eaedeb 100644
--- a/drivers/usb/storage/scsiglue.c
+++ b/drivers/usb/storage/scsiglue.c
@@ -438,22 +438,21 @@ void usb_stor_report_bus_reset(struct us_data *us)
  * /proc/scsi/ functions
  ***********************************************************************/
 
+static int write_info(struct Scsi_Host *host, char *buffer, int length)
+{
+	/* if someone is sending us data, just throw it away */
+	return length;
+}
+
 /* we use this macro to help us write into the buffer */
 #undef SPRINTF
-#define SPRINTF(args...) \
-	do { if (pos < buffer+length) pos += sprintf(pos, ## args); } while (0)
+#define SPRINTF(args...) seq_printf(m, ## args)
 
-static int proc_info (struct Scsi_Host *host, char *buffer,
-		char **start, off_t offset, int length, int inout)
+static int show_info (struct seq_file *m, struct Scsi_Host *host)
 {
 	struct us_data *us = host_to_us(host);
-	char *pos = buffer;
 	const char *string;
 
-	/* if someone is sending us data, just throw it away */
-	if (inout)
-		return length;
-
 	/* print the controller name */
 	SPRINTF("   Host scsi%d: usb-storage\n", host->host_no);
 
@@ -483,28 +482,14 @@ static int proc_info (struct Scsi_Host *host, char *buffer,
 	SPRINTF("    Transport: %s\n", us->transport_name);
 
 	/* show the device flags */
-	if (pos < buffer + length) {
-		pos += sprintf(pos, "       Quirks:");
+	SPRINTF("       Quirks:");
 
 #define US_FLAG(name, value) \
-	if (us->fflags & value) pos += sprintf(pos, " " #name);
+	if (us->fflags & value) seq_printf(m, " " #name);
 US_DO_ALL_FLAGS
 #undef US_FLAG
-
-		*(pos++) = '\n';
-	}
-
-	/*
-	 * Calculate start of next buffer, and return value.
-	 */
-	*start = buffer + offset;
-
-	if ((pos - buffer) < offset)
-		return (0);
-	else if ((pos - buffer - offset) < length)
-		return (pos - buffer - offset);
-	else
-		return (length);
+	seq_putc(m, '\n');
+	return 0;
 }
 
 /***********************************************************************
@@ -549,7 +534,8 @@ struct scsi_host_template usb_stor_host_template = {
 	/* basic userland interface stuff */
 	.name =				"usb-storage",
 	.proc_name =			"usb-storage",
-	.proc_info =			proc_info,
+	.show_info =			show_info,
+	.write_info =			write_info,
 	.info =				host_info,
 
 	/* command interface -- queued only */
-- 
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