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From: Alex Deucher <alexdeucher@gmail.com>
To: amd-gfx@lists.freedesktop.org
Cc: Alex Deucher <alexander.deucher@amd.com>
Subject: [PATCH] drm/amdgpu: return an error for hw access in INFO ioctl when in reset
Date: Fri, 26 Jun 2020 10:04:23 -0400	[thread overview]
Message-ID: <20200626140423.1425349-1-alexander.deucher@amd.com> (raw)

When the GPU is in reset, accessing the hw is unreliable and could
interfere with the reset.  Return an error in those cases.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
index 341d072edd95..fd51d6554ee2 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
@@ -684,6 +684,9 @@ static int amdgpu_info_ioctl(struct drm_device *dev, void *data, struct drm_file
 		if (info->read_mmr_reg.count > 128)
 			return -EINVAL;
 
+		if (adev->in_gpu_reset)
+			return -EPERM;
+
 		regs = kmalloc_array(info->read_mmr_reg.count, sizeof(*regs), GFP_KERNEL);
 		if (!regs)
 			return -ENOMEM;
@@ -854,6 +857,9 @@ static int amdgpu_info_ioctl(struct drm_device *dev, void *data, struct drm_file
 		if (!adev->pm.dpm_enabled)
 			return -ENOENT;
 
+		if (adev->in_gpu_reset)
+			return -EPERM;
+
 		switch (info->sensor_info.type) {
 		case AMDGPU_INFO_SENSOR_GFX_SCLK:
 			/* get sclk in Mhz */
-- 
2.25.4

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             reply	other threads:[~2020-06-26 14:04 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-26 14:04 Alex Deucher [this message]
2020-07-01  5:33 ` [PATCH] drm/amdgpu: return an error for hw access in INFO ioctl when in reset Alex Deucher
2020-07-01  8:20   ` Christian König
2020-07-01 14:34     ` Li, Dennis
2020-07-03  6:05       ` Felix Kuehling
2020-07-03  7:50         ` Christian König

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