pktcdvd: add struct pktcdvd_device.name to pr_err logging where possible

Add a new pkt_err macro to prefix the name to the logging output.  Convert
pr_err where there is a non-null struct pktcdvd_device.

Includes improvements from Andy Shevchenko.
Signed-off-by: Joe Perches <joe@perches.com>
Cc: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/block/pktcdvd.c

@@ -71,6 +71,9 @@
 
 #define DRIVER_NAME	"pktcdvd"
 
+#define pkt_err(pd, fmt, ...)						\
+	pr_err("%s: " fmt, pd->name, ##__VA_ARGS__)
+
 #define pkt_dbg(level, pd, fmt, ...)					\
 do {									\
 	if (level == 2 && PACKET_DEBUG >= 2)				\
@@ -938,7 +941,7 @@ static int pkt_set_segment_merging(struct pktcdvd_device *pd, struct request_que
 		set_bit(PACKET_MERGE_SEGS, &pd->flags);
 		return 0;
 	} else {
-		pr_err("cdrom max_phys_segments too small\n");
+		pkt_err(pd, "cdrom max_phys_segments too small\n");
 		return -EIO;
 	}
 }
@@ -1743,7 +1746,7 @@ static noinline_for_stack int pkt_set_write_settings(struct pktcdvd_device *pd)
 		/*
 		 * paranoia
 		 */
-		pr_err("write mode wrong %d\n", wp->data_block_type);
+		pkt_err(pd, "write mode wrong %d\n", wp->data_block_type);
 		return 1;
 	}
 	wp->packet_size = cpu_to_be32(pd->settings.size >> 2);
@@ -1787,7 +1790,7 @@ static int pkt_writable_track(struct pktcdvd_device *pd, track_information *ti)
 	if (ti->rt == 1 && ti->blank == 0)
 		return 1;
 
-	pr_err("bad state %d-%d-%d\n", ti->rt, ti->blank, ti->packet);
+	pkt_err(pd, "bad state %d-%d-%d\n", ti->rt, ti->blank, ti->packet);
 	return 0;
 }
 
@@ -1820,7 +1823,7 @@ static int pkt_writable_disc(struct pktcdvd_device *pd, disc_information *di)
 	}
 
 	if (di->disc_type != 0x20 && di->disc_type != 0) {
-		pr_err("wrong disc type (%x)\n", di->disc_type);
+		pkt_err(pd, "wrong disc type (%x)\n", di->disc_type);
 		return 0;
 	}
 
@@ -1830,7 +1833,7 @@ static int pkt_writable_disc(struct pktcdvd_device *pd, disc_information *di)
 	}
 
 	if (di->border_status == PACKET_SESSION_RESERVED) {
-		pr_err("can't write to last track (reserved)\n");
+		pkt_err(pd, "can't write to last track (reserved)\n");
 		return 0;
 	}
 
@@ -1855,7 +1858,7 @@ static noinline_for_stack int pkt_probe_settings(struct pktcdvd_device *pd)
 	memset(&ti, 0, sizeof(track_information));
 
 	if ((ret = pkt_get_disc_info(pd, &di))) {
-		pr_err("failed get_disc\n");
+		pkt_err(pd, "failed get_disc\n");
 		return ret;
 	}
 
@@ -1866,12 +1869,12 @@ static noinline_for_stack int pkt_probe_settings(struct pktcdvd_device *pd)
 
 	track = 1; /* (di.last_track_msb << 8) | di.last_track_lsb; */
 	if ((ret = pkt_get_track_info(pd, track, 1, &ti))) {
-		pr_err("failed get_track\n");
+		pkt_err(pd, "failed get_track\n");
 		return ret;
 	}
 
 	if (!pkt_writable_track(pd, &ti)) {
-		pr_err("can't write to this track\n");
+		pkt_err(pd, "can't write to this track\n");
 		return -EROFS;
 	}
 
@@ -1885,7 +1888,7 @@ static noinline_for_stack int pkt_probe_settings(struct pktcdvd_device *pd)
 		return -ENXIO;
 	}
 	if (pd->settings.size > PACKET_MAX_SECTORS) {
-		pr_err("packet size is too big\n");
+		pkt_err(pd, "packet size is too big\n");
 		return -EROFS;
 	}
 	pd->settings.fp = ti.fp;
@@ -1927,7 +1930,7 @@ static noinline_for_stack int pkt_probe_settings(struct pktcdvd_device *pd)
 			pd->settings.block_mode = PACKET_BLOCK_MODE2;
 			break;
 		default:
-			pr_err("unknown data mode\n");
+			pkt_err(pd, "unknown data mode\n");
 			return -EROFS;
 	}
 	return 0;
@@ -1961,7 +1964,7 @@ static noinline_for_stack int pkt_write_caching(struct pktcdvd_device *pd,
 	cgc.buflen = cgc.cmd[8] = 2 + ((buf[0] << 8) | (buf[1] & 0xff));
 	ret = pkt_mode_select(pd, &cgc);
 	if (ret) {
-		pr_err("write caching control failed\n");
+		pkt_err(pd, "write caching control failed\n");
 		pkt_dump_sense(&cgc);
 	} else if (!ret && set)
 		pr_notice("enabled write caching on %s\n", pd->name);
@@ -2200,7 +2203,7 @@ static int pkt_open_dev(struct pktcdvd_device *pd, fmode_t write)
 		goto out;
 
 	if ((ret = pkt_get_last_written(pd, &lba))) {
-		pr_err("pkt_get_last_written failed\n");
+		pkt_err(pd, "pkt_get_last_written failed\n");
 		goto out_putdev;
 	}
 
@@ -2230,7 +2233,7 @@ static int pkt_open_dev(struct pktcdvd_device *pd, fmode_t write)
 
 	if (write) {
 		if (!pkt_grow_pktlist(pd, CONFIG_CDROM_PKTCDVD_BUFFERS)) {
-			pr_err("not enough memory for buffers\n");
+			pkt_err(pd, "not enough memory for buffers\n");
 			ret = -ENOMEM;
 			goto out_putdev;
 		}
@@ -2352,7 +2355,7 @@ static void pkt_make_request(struct request_queue *q, struct bio *bio)
 
 	pd = q->queuedata;
 	if (!pd) {
-		pr_err("%s incorrect request queue\n",
+		pkt_err(pd, "%s incorrect request queue\n",
 			bdevname(bio->bi_bdev, b));
 		goto end_io;
 	}
@@ -2381,7 +2384,7 @@ static void pkt_make_request(struct request_queue *q, struct bio *bio)
 	}
 
 	if (!bio->bi_size || (bio->bi_size % CD_FRAMESIZE)) {
-		pr_err("wrong bio size\n");
+		pkt_err(pd, "wrong bio size\n");
 		goto end_io;
 	}
 
@@ -2602,7 +2605,7 @@ static int pkt_new_dev(struct pktcdvd_device *pd, dev_t dev)
 	struct block_device *bdev;
 
 	if (pd->pkt_dev == dev) {
-		pr_err("recursive setup not allowed\n");
+		pkt_err(pd, "recursive setup not allowed\n");
 		return -EBUSY;
 	}
 	for (i = 0; i < MAX_WRITERS; i++) {
@@ -2610,11 +2613,12 @@ static int pkt_new_dev(struct pktcdvd_device *pd, dev_t dev)
 		if (!pd2)
 			continue;
 		if (pd2->bdev->bd_dev == dev) {
-			pr_err("%s already setup\n", bdevname(pd2->bdev, b));
+			pkt_err(pd, "%s already setup\n",
+				bdevname(pd2->bdev, b));
 			return -EBUSY;
 		}
 		if (pd2->pkt_dev == dev) {
-			pr_err("can't chain pktcdvd devices\n");
+			pkt_err(pd, "can't chain pktcdvd devices\n");
 			return -EBUSY;
 		}
 	}
@@ -2637,7 +2641,7 @@ static int pkt_new_dev(struct pktcdvd_device *pd, dev_t dev)
 	atomic_set(&pd->cdrw.pending_bios, 0);
 	pd->cdrw.thread = kthread_run(kcdrwd, pd, "%s", pd->name);
 	if (IS_ERR(pd->cdrw.thread)) {
-		pr_err("can't start kernel thread\n");
+		pkt_err(pd, "can't start kernel thread\n");
 		ret = -ENOMEM;
 		goto out_mem;
 	}