This is a note to let you know that I've just added the patch titled
scsi: libsas: initialize sas_phy status according to response of DISCOVER
to the 4.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: scsi-libsas-initialize-sas_phy-status-according-to-response-of-discover.patch and it can be found in the queue-4.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.
From foo@baz Mon Apr 9 10:16:32 CEST 2018
From: chenxiang chenxiang66@hisilicon.com Date: Thu, 4 Jan 2018 21:04:33 +0800 Subject: scsi: libsas: initialize sas_phy status according to response of DISCOVER
From: chenxiang chenxiang66@hisilicon.com
[ Upstream commit affc67788fe5dfffad5cda3d461db5cf2b2ff2b0 ]
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 --- drivers/scsi/libsas/sas_expander.c | 1 + 1 file changed, 1 insertion(+)
--- a/drivers/scsi/libsas/sas_expander.c +++ b/drivers/scsi/libsas/sas_expander.c @@ -293,6 +293,7 @@ static void sas_set_ex_phy(struct domain phy->phy->minimum_linkrate = dr->pmin_linkrate; phy->phy->maximum_linkrate = dr->pmax_linkrate; phy->phy->negotiated_linkrate = phy->linkrate; + phy->phy->enabled = (phy->linkrate != SAS_PHY_DISABLED);
skip: if (new_phy)
Patches currently in stable-queue which might be from chenxiang66@hisilicon.com are
queue-4.15/scsi-libsas-initialize-sas_phy-status-according-to-response-of-discover.patch queue-4.15/scsi-libsas-fix-error-when-getting-phy-events.patch queue-4.15/scsi-libsas-fix-memory-leak-in-sas_smp_get_phy_events.patch