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From: Amber Lin <Amber.Lin@amd.com>
To: amd-gfx@lists.freedesktop.org
Cc: Amber Lin <Amber.Lin@amd.com>, mukul.joshi@amd.com
Subject: [PATCH] drm/amdkfd: Avoid null pointer in SMI event
Date: Tue, 30 Mar 2021 17:02:36 -0400	[thread overview]
Message-ID: <20210330210236.23732-1-Amber.Lin@amd.com> (raw)

Power Management IP is initialized/enabled before KFD init. When a
thermal throttling happens before kfd_smi_init is done, calling the KFD
SMI update function causes a stack dump by referring a NULL pointer (
smi_clients list). Check if kfd_init is completed before calling the
function.

Signed-off-by: Amber Lin <Amber.Lin@amd.com>
---
 drivers/gpu/drm/amd/amdkfd/kfd_device.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device.c b/drivers/gpu/drm/amd/amdkfd/kfd_device.c
index 72c893fff61a..3cd46d7190b3 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_device.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_device.c
@@ -1297,7 +1297,7 @@ void kfd_dec_compute_active(struct kfd_dev *kfd)
 
 void kgd2kfd_smi_event_throttle(struct kfd_dev *kfd, uint32_t throttle_bitmask)
 {
-	if (kfd)
+	if (kfd && kfd->init_complete)
 		kfd_smi_event_update_thermal_throttling(kfd, throttle_bitmask);
 }
 
-- 
2.17.1

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             reply	other threads:[~2021-03-30 21:03 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-30 21:02 Amber Lin [this message]
2021-04-01 18:52 ` [PATCH] drm/amdkfd: Avoid null pointer in SMI event Joshi, Mukul

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