Commit a7a20d10 "[SCSI] sd: limit the scope of the async probe domain" introduces a boot regression by moving sd probe work off of the global async queue. Using a local async domain hides the probe work from being synchronized by wait_for_device_probe()->async_synchronize_full(). Fix this by teaching async_synchronize_full() to flush all async work regardless of domain, and take the opportunity to convert scsi scanning to async_schedule(). This enables wait_for_device_probe() to flush scsi scanning work. Changes since v1: http://marc.info/?l=linux-scsi&m=133793153025832&w=2 1/ Tested to fix the boot hang that Meelis reported with v1. Reworked async_synchronize_full() to walk through all the active domains, otherwise we spin on !list_empty(async_domains) and prevent the async context from running. 2/ Added the ability for domains to opt-out of global syncing as requested by Arjan, but also needed for domains that don't want to worry about list corruption when the domain goes out of scope (stack-allocated domains). --- Dan Williams (4): async: introduce 'async_domain' type async: make async_synchronize_full() flush all work regardless of domain scsi: queue async scan work to an async_schedule domain scsi: cleanup usages of scsi_complete_async_scans drivers/regulator/core.c | 2 + drivers/scsi/libsas/sas_ata.c | 2 + drivers/scsi/scsi.c | 4 ++ drivers/scsi/scsi_priv.h | 3 +- drivers/scsi/scsi_scan.c | 24 +++---------- drivers/scsi/scsi_wait_scan.c | 15 +++----- include/linux/async.h | 36 +++++++++++++++++-- include/scsi/scsi_scan.h | 11 ------ kernel/async.c | 76 +++++++++++++++++++++++++++++++---------- kernel/power/hibernate.c | 8 ---- kernel/power/user.c | 2 - 11 files changed, 107 insertions(+), 76 deletions(-) delete mode 100644 include/scsi/scsi_scan.h -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
