4.15-stable review patch. If anyone has any objections, please let me know.
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From: Shivasharan S shivasharan.srikanteshwara@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.saxena@broadcom.com Signed-off-by: Shivasharan S shivasharan.srikanteshwara@broadcom.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/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) megasas_free_host_crash_buffer(instance); scsi_remove_host(instance->host); + instance->unload = 1;
if (megasas_wait_for_adapter_operational(instance)) goto skip_firing_dcmds;