Hi Martin, The SCSI runtime suspend and SPI domain validation mechanisms both use scsi_device_quiesce(). scsi_device_quiesce() restricts blk_queue_enter() to BLK_MQ_REQ_PREEMPT requests. There is a conflict between the requirements of runtime suspend and SCSI domain validation: no requests must be sent to runtime suspended devices that are in the state RPM_SUSPENDED while BLK_MQ_REQ_PREEMPT requests must be processed during SCSI domain validation. This conflict is resolved by reworking the SCSI domain validation implementation. Hybernation, runtime suspend and SCSI domain validation have been retested. Please consider this patch series for kernel v5.11. Thanks, Bart. Changes between v3 and v4: - Instead of creating a second request queue for SPI DV, set RQF_PM. Changes between v2 and v3: - Inlined scsi_mq_alloc_queue() into scsi_alloc_sdev() as requested by Christoph. Changes between v1 and v2: - Rebased this patch series on top of kernel v5.10-rc1. Alan Stern (1): block: Do not accept any requests while suspended Bart Van Assche (8): block: Fix a race in the runtime power management code block: Introduce BLK_MQ_REQ_PM ide: Do not set the RQF_PREEMPT flag for sense requests ide: Mark power management requests with RQF_PM instead of RQF_PREEMPT scsi: Do not wait for a request in scsi_eh_lock_door() scsi_transport_spi: Set RQF_PM for domain validation commands scsi: Only process PM requests if rpm_status != RPM_ACTIVE block: Remove RQF_PREEMPT and BLK_MQ_REQ_PREEMPT block/blk-core.c | 12 ++++++------ block/blk-mq-debugfs.c | 1 - block/blk-mq.c | 4 ++-- block/blk-pm.c | 15 +++++++++------ block/blk-pm.h | 14 +++++++++----- drivers/ide/ide-atapi.c | 1 - drivers/ide/ide-io.c | 7 +------ drivers/ide/ide-pm.c | 2 +- drivers/scsi/scsi_error.c | 7 ++++++- drivers/scsi/scsi_lib.c | 27 ++++++++++++++------------- drivers/scsi/scsi_transport_spi.c | 27 +++++++++++++++++++-------- include/linux/blk-mq.h | 4 ++-- include/linux/blkdev.h | 6 +----- 13 files changed, 70 insertions(+), 57 deletions(-)
