Bug 6272

Summary:	oops in Assertion failed! qc != NULL,drivers/scsi/libata-core.c,ata_pio_block,line=3216
Product:	IO/Storage	Reporter:	James Courtier-Dutton (James)
Component:	Serial ATA	Assignee:	Tejun Heo (htejun)
Status:	CLOSED CODE_FIX
Severity:	blocking	CC:	James, protasnb
Priority:	P2
Hardware:	i386
OS:	Linux
Kernel Version:	Linux version 2.6.15-gentoo-r7 (root@localhost) (gcc version 3.4	Subsystem:
Regression:	---	Bisected commit-id:
Attachments:	Extract from dmesg.

Description James Courtier-Dutton 2006-03-22 16:18:55 UTC

Most recent kernel where this bug did not occur: Still happens.
Distribution: Linux version 2.6.15-gentoo-r7 (root@localhost) (gcc version 3.4.5
(Gentoo 3.4.5-r1, ssp-3.4.5-1.0, pie-8.7.9)) #1 SMP PREEMPT Tue Mar 14 23:04:58
GMT 2006
Hardware Environment: Pentium 4
Software Environment: Linux 2.6.15-gentoo-r7
Problem Description: 

After using
hdparm -S60 /dev/sda
on a SATA disk, the drive will eventually go to sleep.
When one goes to wake it up, it sometimes works, and sometimes does not.
When it fails, one gets an oops
see attachment for extract from kern.log (dmesg)

Steps to reproduce:
hdparm -S60 /dev/sda
wait for the HD to go to sleep.
Try to access the HD.
Repeat until failure.

Comment 1 James Courtier-Dutton 2006-03-22 16:20:08 UTC

Created attachment 7643 [details]
Extract from dmesg.

Extract from dmesg showing the error messages from the libata.

Comment 2 Natalie Protasevich 2007-07-08 17:19:13 UTC

James,
There were multiple fixes to libata. Have you tried latest kernel? Thanks.

Comment 3 Tejun Heo 2007-07-09 11:26:25 UTC

This is definitely fixed now.  Closing.