Patch "scsi: megaraid_sas: unload flag should be set after scsi_remove_host is called" has been added to the 4.15-stable tree

This is a note to let you know that I've just added the patch titled

scsi: megaraid_sas: unload flag should be set after scsi_remove_host is called

to the 4.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
scsi-megaraid_sas-unload-flag-should-be-set-after-scsi_remove_host-is-called.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 <[email protected]> know about it.

From: Shivasharan S <[email protected]>
Date: Fri, 5 Jan 2018 05:27:41 -0800
Subject: scsi: megaraid_sas: unload flag should be set after scsi_remove_host is called

From: Shivasharan S <[email protected]>

[ 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.

---
 drivers/scsi/megaraid/megaraid_sas_base.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -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;

Patches currently in stable-queue which might be from [email protected] are

queue-4.15/scsi-megaraid_sas-error-handling-for-invalid-ldcount-provided-by-firmware-in-raid-map.patch queue-4.15/scsi-megaraid_sas-unload-flag-should-be-set-after-scsi_remove_host-is-called.patch