From: Bart Van Assche bvanassche@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-bvanassche@acm.org Cc: Alan Stern stern@rowland.harvard.edu Cc: James Bottomley James.Bottomley@HansenPartnership.com Cc: Woody Suwalski terraluna977@gmail.com Cc: Can Guo cang@codeaurora.org Cc: Stanley Chu stanley.chu@mediatek.com Cc: Ming Lei ming.lei@redhat.com Cc: Rafael J. Wysocki rafael.j.wysocki@intel.com Cc: Stan Johnson userm57@yahoo.com Reviewed-by: Christoph Hellwig hch@lst.de Reviewed-by: Jens Axboe axboe@kernel.dk Reviewed-by: Hannes Reinecke hare@suse.de Signed-off-by: Bart Van Assche bvanassche@acm.org Signed-off-by: Martin K. Petersen martin.petersen@oracle.com Signed-off-by: Sasha Levin sashal@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 69213842e63e..efb9c3d90213 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);