From 4927f1fcf9afc0043a4a88c98cb7cb6caec11ff1 Mon Sep 17 00:00:00 2001 From: Jack Wang Date: Thu, 5 Nov 2015 12:32:29 +0100 Subject: isci: remove SCSI host before detaching from SAS transport commit cff549e4860f ("scsi: proper state checking and module refcount handling in scsi_device_get") , the reference count of scsi device was changed, which could lead to when rmmod with at least on drive attached, SCSI error handle will run into infinite loop, and lockup the system. Fix it by remove scsi host first, this way scsi core will not send commands down after detaching SAS transport. This is a follow up fix for Benjamin's fix for pm80xx. See also: http://www.spinics.net/lists/linux-scsi/msg90088.html Signed-off-by: Jack Wang Reviewed-by: Christoph Hellwig Signed-off-by: Martin K. Petersen --- drivers/scsi/isci/init.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/scsi/isci') diff --git a/drivers/scsi/isci/init.c b/drivers/scsi/isci/init.c index 0dfcabe3ca7c..9e0d069f987b 100644 --- a/drivers/scsi/isci/init.c +++ b/drivers/scsi/isci/init.c @@ -272,11 +272,11 @@ static void isci_unregister(struct isci_host *isci_host) if (!isci_host) return; + shost = to_shost(isci_host); + scsi_remove_host(shost); sas_unregister_ha(&isci_host->sas_ha); - shost = to_shost(isci_host); sas_remove_host(shost); - scsi_remove_host(shost); scsi_host_put(shost); } -- cgit From 64d513ac31bd02a3c9b69ef04444f36c196f9a9d Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Thu, 8 Oct 2015 09:28:04 +0100 Subject: scsi: use host wide tags by default This patch changes the !blk-mq path to the same defaults as the blk-mq I/O path by always enabling block tagging, and always using host wide tags. We've had blk-mq available for a few releases so bugs with this mode should have been ironed out, and this ensures we get better coverage of over tagging setup over different configs. Signed-off-by: Christoph Hellwig Acked-by: Jens Axboe Reviewed-by: Hannes Reinecke Signed-off-by: James Bottomley --- drivers/scsi/isci/init.c | 1 - 1 file changed, 1 deletion(-) (limited to 'drivers/scsi/isci') diff --git a/drivers/scsi/isci/init.c b/drivers/scsi/isci/init.c index 0dfcabe3ca7c..2f973df72d9b 100644 --- a/drivers/scsi/isci/init.c +++ b/drivers/scsi/isci/init.c @@ -170,7 +170,6 @@ static struct scsi_host_template isci_sht = { .target_destroy = sas_target_destroy, .ioctl = sas_ioctl, .shost_attrs = isci_host_attrs, - .use_blk_tags = 1, .track_queue_depth = 1, }; -- cgit