FAILED: patch "[PATCH] crypto: qat - add shutdown handler to qat_4xxx" failed to apply to 6.6-stable tree

The patch below does not apply to the 6.6-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.6.y
git checkout FETCH_HEAD
git cherry-pick -x 845bc952024dbf482c7434daeac66f764642d52d
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<[email protected]>' --in-reply-to '2025062041-tarnish-puma-e164@gregkh' --subject-prefix 'PATCH 6.6.y' HEAD^..

Possible dependencies:

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 845bc952024dbf482c7434daeac66f764642d52d Mon Sep 17 00:00:00 2001
From: Giovanni Cabiddu <[email protected]>
Date: Wed, 26 Mar 2025 15:59:46 +0000
Subject: [PATCH] crypto: qat - add shutdown handler to qat_4xxx

During a warm reset via kexec, the system bypasses the driver removal sequence, meaning that the remove() callback is not invoked. If a QAT device is not shutdown properly, the device driver will fail to load in a newly rebooted kernel.

This might result in output like the following after the kexec reboot:

    4xxx 0000:01:00.0: Failed to power up the device
    4xxx 0000:01:00.0: Failed to initialize device
    4xxx 0000:01:00.0: Resetting device qat_dev0
    4xxx 0000:01:00.0: probe with driver 4xxx failed with error -14

Implement the shutdown() handler that hooks into the reboot notifier list. This brings down the QAT device and ensures it is shut down properly.

index 5537a9991e4e..1ac415ef3c31 100644
@@ -188,11 +188,19 @@ static void adf_remove(struct pci_dev *pdev)
 	adf_cleanup_accel(accel_dev);
 }
 
+static void adf_shutdown(struct pci_dev *pdev)
+{
+	struct adf_accel_dev *accel_dev = adf_devmgr_pci_to_accel_dev(pdev);
+
+	adf_dev_down(accel_dev);
+}
+
 static struct pci_driver adf_driver = {
 	.id_table = adf_pci_tbl,
 	.name = ADF_4XXX_DEVICE_NAME,
 	.probe = adf_probe,
 	.remove = adf_remove,
+	.shutdown = adf_shutdown,
 	.sriov_configure = adf_sriov_configure,
 	.err_handler = &adf_err_handler,
 };