From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 14994] Random Panic/Freeze due to BUG: unable to handle kernel
NULL pointer dereference at 00000024(?)
Date: Sun, 11 Apr 2010 11:09:51 GMT
Message-ID: <201004111109.o3BB9pff021216@demeter.kernel.org>
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To: linux-ide@vger.kernel.org
https://bugzilla.kernel.org/show_bug.cgi?id=14994
Borislav Petkov changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |bbpetkov@yahoo.de
--- Comment #4 from Borislav Petkov 2010-04-11 11:09:38 ---
Hi,
can you send me the whole dmesg with the oops, also your kernel config.
Also, you could try reproducing the bug after having enabled ide-cd
debugging. For that, you'll need to apply the following patchlet and
rebuild your kernel:
diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index 64207df..4713094 100644
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -1707,6 +1707,8 @@ static int ide_cd_probe(ide_drive_t *drive)
struct gendisk *g;
struct request_sense sense;
+ drive->debug_mask = 0xffffffff;
+
ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x",
drive->driver_req, drive->media);
@@ -1716,7 +1718,6 @@ static int ide_cd_probe(ide_drive_t *drive)
if (drive->media != ide_cdrom && drive->media != ide_optical)
goto failed;
- drive->debug_mask = debug_mask;
drive->irq_handler = cdrom_newpc_intr;
info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
diff --git a/drivers/ide/ide-cd.h b/drivers/ide/ide-cd.h
index 93a3cf1..613542a 100644
--- a/drivers/ide/ide-cd.h
+++ b/drivers/ide/ide-cd.h
@@ -8,7 +8,7 @@
#include
#include
-#define IDECD_DEBUG_LOG 0
+#define IDECD_DEBUG_LOG 1
#if IDECD_DEBUG_LOG
#define ide_debug_log(lvl, fmt, args...) __ide_debug_log(lvl, fmt, ## args)
--
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