scsi: Implement ch_printk()

Update the ch driver to use dev_printk() variants instead of
plain printk(); this will prefix logging messages with the
appropriate device.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>

1 files changed, 9 insertions, 5 deletions

diff --git a/drivers/scsi/ch.c b/drivers/scsi/ch.c
index 7e952cadbcf1..ef5ae0d03616 100644
--- a/drivers/scsi/ch.c
+++ b/drivers/scsi/ch.c
@@ -84,15 +84,19 @@ static const char * vendor_labels[CH_TYPES-4] = {
 };
 // module_param_string_array(vendor_labels, NULL, 0444);
 
+#define ch_printk(prefix, ch, fmt, a...) \
+        sdev_printk(prefix, (ch)->device, "[%s] " fmt, \
+                    (ch)->name, ##a)
+
 #define DPRINTK(fmt, arg...)                                            \
 do {                                                                    \
         if (debug)                                                      \
-                printk(KERN_DEBUG "%s: " fmt, ch->name, ##arg);         \
+                ch_printk(KERN_DEBUG, ch, fmt, ##arg);                  \
 } while (0)
 #define VPRINTK(level, fmt, arg...)                                     \
 do {                                                                    \
         if (verbose)                                                    \
-                printk(level "%s: " fmt, ch->name, ##arg);              \
+                ch_printk(level, ch, fmt, ##arg);                       \
 } while (0)
 
 /* ------------------------------------------------------------------- */
@@ -196,7 +200,7 @@ ch_do_scsi(scsi_changer *ch, unsigned char *cmd,
                 __scsi_print_command(cmd);
         }
 
-        result = scsi_execute_req(ch->device, cmd, direction, buffer,
+        result = scsi_execute_req(ch->device, cmd, direction, buffer,
                                   buflength, &sshdr, timeout * HZ,
                                   MAX_RETRIES, NULL);
 
@@ -924,8 +928,8 @@ static int ch_probe(struct device *dev)
                                   MKDEV(SCSI_CHANGER_MAJOR, ch->minor), ch,
                                   "s%s", ch->name);
         if (IS_ERR(class_dev)) {
-                printk(KERN_WARNING "ch%d: device_create failed\n",
-                       ch->minor);
+                sdev_printk(KERN_WARNING, sd, "ch%d: device_create failed\n",
+                            ch->minor);
                 ret = PTR_ERR(class_dev);
                 goto remove_idr;
         }