[PATCH 1/2] ide: add ide_dump_identify() debug helper

[Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>]

* Add ide_dump_identify() debug helper for dumping raw identify data in
  the hdparm friendly format (== the identify data can be extracted from
  dmesg output and passed to hdparm --Istdin).

* Dump identify data in ide-probe.c::do_identify() if DEBUG is enabled.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
---
 drivers/ide/ide-probe.c |    4 ++++
 include/linux/ide.h     |    5 +++++
 2 files changed, 9 insertions(+)

Index: b/drivers/ide/ide-probe.c
===================================================================
--- a/drivers/ide/ide-probe.c
+++ b/drivers/ide/ide-probe.c
@@ -129,6 +129,10 @@ static inline void do_identify (ide_driv
 
 	drive->id_read = 1;
 	local_irq_enable();
+#ifdef DEBUG
+	printk(KERN_INFO "%s: dumping identify data\n", drive->name);
+	ide_dump_identify((u8 *)id);
+#endif
 	ide_fix_driveid(id);
 
 #if defined (CONFIG_SCSI_EATA_PIO) || defined (CONFIG_SCSI_EATA)
Index: b/include/linux/ide.h
===================================================================
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -1291,6 +1291,11 @@ extern struct bus_type ide_bus_type;
 #define ide_id_has_flush_cache_ext(id)	\
 	(((id)->cfs_enable_2 & 0x2400) == 0x2400)
 
+static inline void ide_dump_identify(u8 *id)
+{
+	print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 16, 2, id, 512, 0);
+}
+
 static inline int hwif_to_node(ide_hwif_t *hwif)
 {
 	struct pci_dev *dev = hwif->pci_dev;