This is a note to let you know that I've just added the patch titled
SCSI: megaraid_sas: megaraid_sas driver init fails in kdump kernel
to the 3.4-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-megaraid_sas-driver-init-fails-in-kdump-kernel.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 6431f5d7c6025f8b007af06ea090de308f7e6881 Mon Sep 17 00:00:00 2001
From: "Sumit.Saxena@xxxxxxx" <Sumit.Saxena@xxxxxxx>
Date: Tue, 16 Jul 2013 02:26:05 +0530
Subject: SCSI: megaraid_sas: megaraid_sas driver init fails in kdump kernel
From: "Sumit.Saxena@xxxxxxx" <Sumit.Saxena@xxxxxxx>
commit 6431f5d7c6025f8b007af06ea090de308f7e6881 upstream.
Problem: When Hardware IOMMU is on, megaraid_sas driver initialization fails
in kdump kernel with LSI MegaRAID controller(device id-0x73).
Actually this issue needs fix in firmware, but for firmware running in field,
this driver fix is proposed to resolve the issue. At firmware initialization
time, if firmware does not come to ready state, driver will reset the adapter
and retry for firmware transition to ready state unconditionally(not only
executed for kdump kernel).
Signed-off-by: Sumit Saxena <sumit.saxena@xxxxxxx>
Signed-off-by: Kashyap Desai <kashyap.desai@xxxxxxx>
Signed-off-by: James Bottomley <JBottomley@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/scsi/megaraid/megaraid_sas_base.c | 20 +++++++++++++++-----
1 file changed, 15 insertions(+), 5 deletions(-)
--- a/drivers/scsi/megaraid/megaraid_sas_base.c
+++ b/drivers/scsi/megaraid/megaraid_sas_base.c
@@ -3493,11 +3493,21 @@ static int megasas_init_fw(struct megasa
break;
}
- /*
- * We expect the FW state to be READY
- */
- if (megasas_transition_to_ready(instance, 0))
- goto fail_ready_state;
+ if (megasas_transition_to_ready(instance, 0)) {
+ atomic_set(&instance->fw_reset_no_pci_access, 1);
+ instance->instancet->adp_reset
+ (instance, instance->reg_set);
+ atomic_set(&instance->fw_reset_no_pci_access, 0);
+ dev_info(&instance->pdev->dev,
+ "megasas: FW restarted successfully from %s!\n",
+ __func__);
+
+ /*waitting for about 30 second before retry*/
+ ssleep(30);
+
+ if (megasas_transition_to_ready(instance, 0))
+ goto fail_ready_state;
+ }
/* Check if MSI-X is supported while in ready state */
msix_enable = (instance->instancet->read_fw_status_reg(reg_set) &
Patches currently in stable-queue which might be from Sumit.Saxena@xxxxxxx are
queue-3.4/scsi-megaraid_sas-megaraid_sas-driver-init-fails-in-kdump-kernel.patch
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