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linux/drivers/scsi/libsas
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chenxiang b728b7e24f scsi: libsas: initialize sas_phy status according to response of DISCOVER 
[ Upstream commit affc67788f ]

The status of SAS PHY is in sas_phy->enabled. There is an issue that the
status of a remote SAS PHY may be initialized incorrectly: if disable
remote SAS PHY through sysfs interface (such as echo 0 >
/sys/class/sas_phy/phy-1:0:0/enable), then reboot the system, and we
will find the status of remote SAS PHY which is disabled before is
1 (cat /sys/class/sas_phy/phy-1:0:0/enable). But actually the status of
remote SAS PHY is disabled and the device attached is not found.

In SAS protocol, NEGOTIATED LOGICAL LINK RATE field of DISCOVER response
is 0x1 when remote SAS PHY is disabled. So initialize sas_phy->enabled
according to the value of NEGOTIATED LOGICAL LINK RATE field.

Signed-off-by: chenxiang <chenxiang66@hisilicon.com>
Reviewed-by: John Garry <john.garry@huawei.com>
Signed-off-by: Jason Yan <yanaijie@huawei.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2018-04-12 12:32:18 +02:00
..
Kconfig scsi: scsi_transport_sas: switch to bsg-lib for SMP passthrough 2017-08-29 21:51:45 -04:00
Makefile Merge branch 'trivial' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6 2011-03-20 18:14:55 -07:00
sas_ata.c scsi: libsas: Annotate fall-through in a switch statement 2017-08-25 17:08:08 -04:00
sas_discover.c libsas: Fix Kernel Crash in smp_execute_task 2015-03-06 20:51:29 -08:00
sas_dump.c [SCSI] libsas: suspend / resume support 2012-08-24 13:10:23 +04:00
sas_dump.h [SCSI] libsas: convert to standard kernel debugging 2011-01-24 12:05:38 -06:00
sas_event.c scsi: sas: scsi_queue_work can fail, so make callers aware 2017-06-27 21:28:04 -04:00
sas_expander.c scsi: libsas: initialize sas_phy status according to response of DISCOVER 2018-04-12 12:32:18 +02:00
sas_host_smp.c scsi: scsi_transport_sas: switch to bsg-lib for SMP passthrough 2017-08-29 21:51:45 -04:00
sas_init.c scsi: sas: remove sas_domain_release_transport 2017-04-04 20:16:38 -04:00
sas_internal.h scsi: scsi_transport_sas: switch to bsg-lib for SMP passthrough 2017-08-29 21:51:45 -04:00
sas_phy.c [SCSI] libsas: suspend / resume support 2012-08-24 13:10:23 +04:00
sas_port.c [SCSI] sas: unify the pointlessly separated enums sas_dev_type and sas_device_type 2013-05-10 07:47:52 -07:00
sas_scsi_host.c scsi: libsas: Disable asynchronous aborts for SATA devices 2018-01-23 19:58:18 +01:00
sas_task.c scsi: Add export.h for EXPORT_SYMBOL/THIS_MODULE as required 2011-10-31 19:31:23 -04:00