From: Bart Van Assche <bvanass...@acm.org> [ Upstream commit cfefd9f8240a7b9fdd96fcd54cb029870b6d8d88 ]
Disable runtime power management during domain validation. Since a later patch removes RQF_PREEMPT, set RQF_PM for domain validation commands such that these are executed in the quiesced SCSI device state. Link: https://lore.kernel.org/r/20201209052951.16136-6-bvanass...@acm.org Cc: Alan Stern <st...@rowland.harvard.edu> Cc: James Bottomley <james.bottom...@hansenpartnership.com> Cc: Woody Suwalski <terraluna...@gmail.com> Cc: Can Guo <c...@codeaurora.org> Cc: Stanley Chu <stanley....@mediatek.com> Cc: Ming Lei <ming....@redhat.com> Cc: Rafael J. Wysocki <rafael.j.wyso...@intel.com> Cc: Stan Johnson <user...@yahoo.com> Reviewed-by: Christoph Hellwig <h...@lst.de> Reviewed-by: Jens Axboe <ax...@kernel.dk> Reviewed-by: Hannes Reinecke <h...@suse.de> Signed-off-by: Bart Van Assche <bvanass...@acm.org> Signed-off-by: Martin K. Petersen <martin.peter...@oracle.com> Signed-off-by: Sasha Levin <sas...@kernel.org> --- drivers/scsi/scsi_transport_spi.c | 27 +++++++++++++++++++-------- 1 file changed, 19 insertions(+), 8 deletions(-) diff --git a/drivers/scsi/scsi_transport_spi.c b/drivers/scsi/scsi_transport_spi.c index 69213842e63e0..efb9c3d902133 100644 --- a/drivers/scsi/scsi_transport_spi.c +++ b/drivers/scsi/scsi_transport_spi.c @@ -130,12 +130,16 @@ static int spi_execute(struct scsi_device *sdev, const void *cmd, sshdr = &sshdr_tmp; for(i = 0; i < DV_RETRIES; i++) { + /* + * The purpose of the RQF_PM flag below is to bypass the + * SDEV_QUIESCE state. + */ result = scsi_execute(sdev, cmd, dir, buffer, bufflen, sense, sshdr, DV_TIMEOUT, /* retries */ 1, REQ_FAILFAST_DEV | REQ_FAILFAST_TRANSPORT | REQ_FAILFAST_DRIVER, - 0, NULL); + RQF_PM, NULL); if (driver_byte(result) != DRIVER_SENSE || sshdr->sense_key != UNIT_ATTENTION) break; @@ -1018,23 +1022,26 @@ spi_dv_device(struct scsi_device *sdev) */ lock_system_sleep(); + if (scsi_autopm_get_device(sdev)) + goto unlock_system_sleep; + if (unlikely(spi_dv_in_progress(starget))) - goto unlock; + goto put_autopm; if (unlikely(scsi_device_get(sdev))) - goto unlock; + goto put_autopm; spi_dv_in_progress(starget) = 1; buffer = kzalloc(len, GFP_KERNEL); if (unlikely(!buffer)) - goto out_put; + goto put_sdev; /* We need to verify that the actual device will quiesce; the * later target quiesce is just a nice to have */ if (unlikely(scsi_device_quiesce(sdev))) - goto out_free; + goto free_buffer; scsi_target_quiesce(starget); @@ -1054,12 +1061,16 @@ spi_dv_device(struct scsi_device *sdev) spi_initial_dv(starget) = 1; - out_free: +free_buffer: kfree(buffer); - out_put: + +put_sdev: spi_dv_in_progress(starget) = 0; scsi_device_put(sdev); -unlock: +put_autopm: + scsi_autopm_put_device(sdev); + +unlock_system_sleep: unlock_system_sleep(); } EXPORT_SYMBOL(spi_dv_device); -- 2.27.0
