From: Ming Qian ming.qian@nxp.com
[ Upstream commit a621cc4bed97e49f5a8019f5215dec7e208a7c4d ]
In reset vpu core, driver will wait for a response event, but if there are still some events unhandled, they will be handled first, driver may acquire core lock for that. So if we do reset in core lock, it may led to reset timeout.
Fixes: 9f599f351e86a ("media: amphion: add vpu core driver") Signed-off-by: Ming Qian ming.qian@nxp.com Signed-off-by: Hans Verkuil hverkuil-cisco@xs4all.nl Signed-off-by: Mauro Carvalho Chehab mchehab@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/media/platform/amphion/vpu_core.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/media/platform/amphion/vpu_core.c b/drivers/media/platform/amphion/vpu_core.c index 68ad183925fd..51a764713159 100644 --- a/drivers/media/platform/amphion/vpu_core.c +++ b/drivers/media/platform/amphion/vpu_core.c @@ -455,8 +455,13 @@ int vpu_inst_unregister(struct vpu_inst *inst) } vpu_core_check_hang(core); if (core->state == VPU_CORE_HANG && !core->instance_mask) { + int err; + dev_info(core->dev, "reset hang core\n"); - if (!vpu_core_sw_reset(core)) { + mutex_unlock(&core->lock); + err = vpu_core_sw_reset(core); + mutex_lock(&core->lock); + if (!err) { core->state = VPU_CORE_ACTIVE; core->hang_mask = 0; }