ide: add a driver-wide debugging macro

Add __ide_debug_log() debugging macro which is controlled by drive->debug_mask.
The macro has to have the macro DRV_NAME defined in each driver before use.
Also, add different debugging levels depending on the functionality debugged.

Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

1 files changed, 20 insertions, 0 deletions

diff --git a/include/linux/ide.h b/include/linux/ide.h
index fcd98e1d1863..02c4c642e6a5 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -927,6 +927,26 @@ static inline void ide_proc_unregister_driver(ide_drive_t *drive, ide_driver_t *
 #define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) return 0;
 #endif
 
+enum {
+        /* enter/exit functions */
+        IDE_DBG_FUNC =                  (1 << 0),
+        /* sense key/asc handling */
+        IDE_DBG_SENSE =                 (1 << 1),
+        /* packet commands handling */
+        IDE_DBG_PC =                    (1 << 2),
+        /* request handling */
+        IDE_DBG_RQ =                    (1 << 3),
+        /* driver probing/setup */
+        IDE_DBG_PROBE =                 (1 << 4),
+};
+
+/* DRV_NAME has to be defined in the driver before using the macro below */
+#define __ide_debug_log(lvl, fmt, args...)                      \
+{                                                               \
+        if (unlikely(drive->debug_mask & lvl))                  \
+                printk(KERN_INFO DRV_NAME ": " fmt, ## args);   \
+}
+
 /*
  * Power Management step value (rq->pm->pm_step).
  *