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From: Guchun Chen <guchun.chen@amd.com>
To: <amd-gfx@lists.freedesktop.org>, <christian.koenig@amd.com>,
	<xinhui.pan@amd.com>, <alexander.deucher@amd.com>,
	<andrey.grodzovsky@amd.com>
Cc: Guchun Chen <guchun.chen@amd.com>
Subject: [PATCH] drm/amdgpu: add missed write lock for pci detected state pci_channel_io_normal
Date: Fri, 1 Oct 2021 10:00:00 +0800	[thread overview]
Message-ID: <20211001020000.14501-1-guchun.chen@amd.com> (raw)

When a PCI error state pci_channel_io_normal is detectd, it will
report PCI_ERS_RESULT_CAN_RECOVER status to PCI driver, and PCI driver
will continue the execution of PCI resume callback report_resume by
pci_walk_bridge, and the callback will go into amdgpu_pci_resume
finally, where write lock is releasd unconditionally without acquiring
such lock.

Fixes: c9a6b82f45e2("drm/amdgpu: Implement DPC recovery")
Signed-off-by: Guchun Chen <guchun.chen@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index bb5ad2b6ca13..12f822d51de2 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -5370,6 +5370,7 @@ pci_ers_result_t amdgpu_pci_error_detected(struct pci_dev *pdev, pci_channel_sta
 
 	switch (state) {
 	case pci_channel_io_normal:
+		amdgpu_device_lock_adev(adev, NULL);
 		return PCI_ERS_RESULT_CAN_RECOVER;
 	/* Fatal error, prepare for slot reset */
 	case pci_channel_io_frozen:
-- 
2.17.1


             reply	other threads:[~2021-10-01  2:00 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-01  2:00 Guchun Chen [this message]
2021-10-01  2:21 ` [PATCH] drm/amdgpu: add missed write lock for pci detected state pci_channel_io_normal Andrey Grodzovsky
2021-10-01  8:21   ` Chen, Guchun
2021-10-01 14:28     ` Andrey Grodzovsky
2021-10-01 15:21       ` Chen, Guchun
2021-10-02 15:20         ` Chen, Guchun

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