Patch "scsi: aacraid: Fix hang in kdump" has been added to the 4.15-stable tree

Patch "scsi: aacraid: Fix hang in kdump" has been added to the 4.15-stable tree

[gregkh]

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

    scsi: aacraid: Fix hang in kdump

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-aacraid-fix-hang-in-kdump.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 c5313ae8e4e037bfaf5e56cb8d6efdb8e92ce437 Mon Sep 17 00:00:00 2001
From: Raghava Aditya Renukunta <RaghavaAditya.Renukunta@microsemi.com>
Date: Tue, 26 Dec 2017 20:34:24 -0800
Subject: scsi: aacraid: Fix hang in kdump

From: Raghava Aditya Renukunta <RaghavaAditya.Renukunta@microsemi.com>

commit c5313ae8e4e037bfaf5e56cb8d6efdb8e92ce437 upstream.

Driver attempts to perform a device scan and device add after coming out
of reset. At times when the kdump kernel loads and it tries to perform
eh recovery, the device scan hangs since its commands are blocked because
of the eh recovery. This should have shown up in normal eh recovery path
(Should have been obvious)

Remove the code that performs scanning.I can live without the rescanning
support in the stable kernels but a hanging kdump/eh recovery needs to be
fixed.

Fixes: a2d0321dd532901e (scsi: aacraid: Reload offlined drives after controller reset)
Reported-by: Douglas Miller <dougmill@linux.vnet.ibm.com>
Tested-by: Guilherme G. Piccoli <gpiccoli@linux.vnet.ibm.com>
Fixes: a2d0321dd532901e (scsi: aacraid: Reload offlined drives after controller reset)
Signed-off-by: Raghava Aditya Renukunta <RaghavaAditya.Renukunta@microsemi.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/scsi/aacraid/aachba.c  |    1 -
 drivers/scsi/aacraid/commsup.c |    9 +--------
 2 files changed, 1 insertion(+), 9 deletions(-)

--- a/drivers/scsi/aacraid/aachba.c
+++ b/drivers/scsi/aacraid/aachba.c
@@ -918,7 +918,6 @@ static void setinqstr(struct aac_dev *de
 		char *cname = kmemdup(sup_adap_info->adapter_type_text,
 				sizeof(sup_adap_info->adapter_type_text),
 								GFP_ATOMIC);
-
 		if (!cname)
 			return;
 
--- a/drivers/scsi/aacraid/commsup.c
+++ b/drivers/scsi/aacraid/commsup.c
@@ -1643,14 +1643,7 @@ static int _aac_reset_adapter(struct aac
 out:
 	aac->in_reset = 0;
 	scsi_unblock_requests(host);
-	/*
-	 * Issue bus rescan to catch any configuration that might have
-	 * occurred
-	 */
-	if (!retval) {
-		dev_info(&aac->pdev->dev, "Issuing bus rescan\n");
-		scsi_scan_host(host);
-	}
+
 	if (jafo) {
 		spin_lock_irq(host->host_lock);
 	}


Patches currently in stable-queue which might be from RaghavaAditya.Renukunta@microsemi.com are

queue-4.15/scsi-aacraid-fix-udev-inquiry-race-condition.patch
queue-4.15/scsi-aacraid-fix-hang-in-kdump.patch