Patch "scsi: qedi: Fix firmware halt over suspend and resume" has been added to the 6.1-stable tree

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

    scsi: qedi: Fix firmware halt over suspend and resume

to the 6.1-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-qedi-fix-firmware-halt-over-suspend-and-resume.patch
and it can be found in the queue-6.1 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.


>From 1516ee035df32115197cd93ae3619dba7b020986 Mon Sep 17 00:00:00 2001
From: Nilesh Javali <njavali@xxxxxxxxxxx>
Date: Mon, 7 Aug 2023 15:07:25 +0530
Subject: scsi: qedi: Fix firmware halt over suspend and resume

From: Nilesh Javali <njavali@xxxxxxxxxxx>

commit 1516ee035df32115197cd93ae3619dba7b020986 upstream.

While performing certain power-off sequences, PCI drivers are called to
suspend and resume their underlying devices through PCI PM (power
management) interface. However the hardware does not support PCI PM
suspend/resume operations so system wide suspend/resume leads to bad MFW
(management firmware) state which causes various follow-up errors in driver
when communicating with the device/firmware.

To fix this driver implements PCI PM suspend handler to indicate
unsupported operation to the PCI subsystem explicitly, thus avoiding system
to go into suspended/standby mode.

Fixes: ace7f46ba5fd ("scsi: qedi: Add QLogic FastLinQ offload iSCSI driver framework.")
Signed-off-by: Nilesh Javali <njavali@xxxxxxxxxxx>
Link: https://lore.kernel.org/r/20230807093725.46829-2-njavali@xxxxxxxxxxx
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/scsi/qedi/qedi_main.c |   18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

--- a/drivers/scsi/qedi/qedi_main.c
+++ b/drivers/scsi/qedi/qedi_main.c
@@ -69,6 +69,7 @@ static struct nvm_iscsi_block *qedi_get_
 static void qedi_recovery_handler(struct work_struct *work);
 static void qedi_schedule_hw_err_handler(void *dev,
 					 enum qed_hw_err_type err_type);
+static int qedi_suspend(struct pci_dev *pdev, pm_message_t state);
 
 static int qedi_iscsi_event_cb(void *context, u8 fw_event_code, void *fw_handle)
 {
@@ -2510,6 +2511,22 @@ static void qedi_shutdown(struct pci_dev
 	__qedi_remove(pdev, QEDI_MODE_SHUTDOWN);
 }
 
+static int qedi_suspend(struct pci_dev *pdev, pm_message_t state)
+{
+	struct qedi_ctx *qedi;
+
+	if (!pdev) {
+		QEDI_ERR(NULL, "pdev is NULL.\n");
+		return -ENODEV;
+	}
+
+	qedi = pci_get_drvdata(pdev);
+
+	QEDI_ERR(&qedi->dbg_ctx, "%s: Device does not support suspend operation\n", __func__);
+
+	return -EPERM;
+}
+
 static int __qedi_probe(struct pci_dev *pdev, int mode)
 {
 	struct qedi_ctx *qedi;
@@ -2868,6 +2885,7 @@ static struct pci_driver qedi_pci_driver
 	.remove = qedi_remove,
 	.shutdown = qedi_shutdown,
 	.err_handler = &qedi_err_handler,
+	.suspend = qedi_suspend,
 };
 
 static int __init qedi_init(void)


Patches currently in stable-queue which might be from njavali@xxxxxxxxxxx are

queue-6.1/scsi-qedf-fix-firmware-halt-over-suspend-and-resume.patch
queue-6.1/scsi-qedi-fix-firmware-halt-over-suspend-and-resume.patch



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