mbox series

[RFC,0/6] Fix a deadlock in the SCSI power management code

Message ID 20200831025357.32700-1-bvanassche@acm.org
Headers show
Series Fix a deadlock in the SCSI power management code | expand

Message

Bart Van Assche Aug. 31, 2020, 2:53 a.m. UTC 
Recently Martin Kepplinger reported a problem with the SCSI runtime PM
code. Alan Stern root-caused the reported deadlock. This patch series is
an attempt to fix that deadlock. These patches compile but have not yet
been tested.

Bart Van Assche (6):
  ide: Do not set the RQF_PREEMPT flag for sense requests
  scsi: Remove an incorrect comment
  scsi: Pass a request queue pointer to __scsi_execute()
  scsi_transport_spi: Make spi_execute() accept a request queue pointer
  scsi_transport_spi: Freeze request queues instead of quiescing
  block, scsi, ide: Only submit power management requests in state
    RPM_SUSPENDED

 block/blk-core.c                  |   6 +-
 block/blk-mq-debugfs.c            |   1 -
 block/blk-mq.c                    |   4 +-
 drivers/ide/ide-atapi.c           |   1 -
 drivers/ide/ide-io.c              |   3 +-
 drivers/ide/ide-pm.c              |   2 +-
 drivers/scsi/scsi_lib.c           |  61 ++++++++-------
 drivers/scsi/scsi_priv.h          |   2 +
 drivers/scsi/scsi_transport_spi.c | 123 +++++++++++++++++-------------
 include/linux/blk-mq.h            |   4 +-
 include/linux/blkdev.h            |   6 +-
 include/scsi/scsi_device.h        |  16 ++--
 12 files changed, 120 insertions(+), 109 deletions(-)

Comments

Bart Van Assche Sept. 1, 2020, 3:55 a.m. UTC | #1 
On 2020-08-31 02:09, Martin Kepplinger wrote:
> Tested-by: Martin Kepplinger <martin.kepplinger@puri.sm>

Thanks for having tested this patch series!

Bart.