From: "Wachowski, Karol" <karol.wachowski@intel.com>
Date: Tue, 2 Apr 2024 12:49:24 +0200
Subject: [PATCH] accel/ivpu: Fix PCI D0 state entry in resume
References: bsc#1012628
Patch-mainline: 6.8.7
Git-commit: 3534eacbf101f6e66105f03d869a03893407c384

commit 3534eacbf101f6e66105f03d869a03893407c384 upstream.

In case of failed power up we end up left in PCI D3hot
state making it impossible to access NPU registers on retry.
Enter D0 state on retry before proceeding with power up sequence.

Fixes: 28083ff18d3f ("accel/ivpu: Fix DevTLB errors on suspend/resume and recovery")
Cc: <stable@vger.kernel.org> # v6.8+
Signed-off-by: Wachowski, Karol <karol.wachowski@intel.com>
Signed-off-by: Jacek Lawrynowicz <jacek.lawrynowicz@linux.intel.com>
Reviewed-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240402104929.941186-4-jacek.lawrynowicz@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/accel/ivpu/ivpu_pm.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/accel/ivpu/ivpu_pm.c b/drivers/accel/ivpu/ivpu_pm.c
index 5f738542..2b73c20e 100644
--- a/drivers/accel/ivpu/ivpu_pm.c
+++ b/drivers/accel/ivpu/ivpu_pm.c
@@ -74,10 +74,10 @@ static int ivpu_resume(struct ivpu_device *vdev)
 {
 	int ret;
 
-	pci_set_power_state(to_pci_dev(vdev->drm.dev), PCI_D0);
+retry:
 	pci_restore_state(to_pci_dev(vdev->drm.dev));
+	pci_set_power_state(to_pci_dev(vdev->drm.dev), PCI_D0);
 
-retry:
 	ret = ivpu_hw_power_up(vdev);
 	if (ret) {
 		ivpu_err(vdev, "Failed to power up HW: %d\n", ret);
-- 
2.44.0