Refactor spinlock_irq(&sdev->ipc_lock) sequence in irq_handler to avoid race conditions for acquiring hw_semaphore.
Signed-off-by: Venkata Prasad Potturu venkataprasad.potturu@amd.com --- sound/soc/sof/amd/acp-ipc.c | 4 +--- sound/soc/sof/amd/acp.c | 3 +++ 2 files changed, 4 insertions(+), 3 deletions(-)
diff --git a/sound/soc/sof/amd/acp-ipc.c b/sound/soc/sof/amd/acp-ipc.c index fcb54f545fea..2743f07a5e08 100644 --- a/sound/soc/sof/amd/acp-ipc.c +++ b/sound/soc/sof/amd/acp-ipc.c @@ -3,7 +3,7 @@ // This file is provided under a dual BSD/GPLv2 license. When using or // redistributing this file, you may do so under either license. // -// Copyright(c) 2021 Advanced Micro Devices, Inc. +// Copyright(c) 2021, 2023 Advanced Micro Devices, Inc. // // Authors: Balakishore Pati Balakishore.pati@amd.com // Ajit Kumar Pandey AjitKumar.Pandey@amd.com @@ -188,13 +188,11 @@ irqreturn_t acp_sof_ipc_irq_thread(int irq, void *context)
dsp_ack = snd_sof_dsp_read(sdev, ACP_DSP_BAR, ACP_SCRATCH_REG_0 + dsp_ack_write); if (dsp_ack) { - spin_lock_irq(&sdev->ipc_lock); /* handle immediate reply from DSP core */ acp_dsp_ipc_get_reply(sdev); snd_sof_ipc_reply(sdev, 0); /* set the done bit */ acp_dsp_ipc_dsp_done(sdev); - spin_unlock_irq(&sdev->ipc_lock); ipc_irq = true; }
diff --git a/sound/soc/sof/amd/acp.c b/sound/soc/sof/amd/acp.c index 603ea5fc0d0d..7860724c4d2d 100644 --- a/sound/soc/sof/amd/acp.c +++ b/sound/soc/sof/amd/acp.c @@ -343,11 +343,13 @@ static irqreturn_t acp_irq_thread(int irq, void *context) const struct sof_amd_acp_desc *desc = get_chip_info(sdev->pdata); unsigned int count = ACP_HW_SEM_RETRY_COUNT;
+ spin_lock_irq(&sdev->ipc_lock); while (snd_sof_dsp_read(sdev, ACP_DSP_BAR, desc->hw_semaphore_offset)) { /* Wait until acquired HW Semaphore lock or timeout */ count--; if (!count) { dev_err(sdev->dev, "%s: Failed to acquire HW lock\n", __func__); + spin_unlock_irq(&sdev->ipc_lock); return IRQ_NONE; } } @@ -356,6 +358,7 @@ static irqreturn_t acp_irq_thread(int irq, void *context) /* Unlock or Release HW Semaphore */ snd_sof_dsp_write(sdev, ACP_DSP_BAR, desc->hw_semaphore_offset, 0x0);
+ spin_unlock_irq(&sdev->ipc_lock); return IRQ_HANDLED; };