4.15-stable review patch.  If anyone has any objections, please let me know.


From: Shivasharan S <shivasharan.srikanteshw...@broadcom.com>

[ Upstream commit f3f7920b3910171b2999c7dc2335eb9f583e44f2 ]

Issue - Driver returns DID_NO_CONNECT when unload is in progress,
indicated using instance->unload flag. In case of dynamic unload of
driver, this flag is set before calling scsi_remove_host(). While doing
manual driver unload, user will see lots of prints for Sync Cache
command with DID_NO_CONNECT status.

Fix - Set the instance->unload flag after scsi_remove_host(). Allow
device removal process to be completed and do not block any command
before that.  SCSI commands (like SYNC_CACHE) are received (as part of
scsi_remove_host) by driver during unload will be submitted further down
to the drives.

Signed-off-by: Sumit Saxena <sumit.sax...@broadcom.com>
Signed-off-by: Shivasharan S <shivasharan.srikanteshw...@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.peter...@oracle.com>
Signed-off-by: Sasha Levin <alexander.le...@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
 drivers/scsi/megaraid/megaraid_sas_base.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/scsi/megaraid/megaraid_sas_base.c
+++ b/drivers/scsi/megaraid/megaraid_sas_base.c
@@ -6822,7 +6822,6 @@ static void megasas_detach_one(struct pc
        u32 pd_seq_map_sz;
        instance = pci_get_drvdata(pdev);
-       instance->unload = 1;
        host = instance->host;
        fusion = instance->ctrl_context;
@@ -6833,6 +6832,7 @@ static void megasas_detach_one(struct pc
        if (instance->fw_crash_state != UNAVAILABLE)
+       instance->unload = 1;
        if (megasas_wait_for_adapter_operational(instance))
                goto skip_firing_dcmds;

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