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fix(uhci): rx fsm race condition

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Closes https://github.com/espressif/esp-idf/issues/18746
This commit is contained in:
Hu Rui
2026-07-08 17:08:08 +08:00
parent 6fa5704eda
commit c73094392f
1 changed files with 3 additions and 2 deletions
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5
components/esp_driver_uart/src/uhci.c
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@@ -176,7 +176,7 @@ static bool uhci_gdma_rx_callback_done(gdma_channel_handle_t dma_chan, gdma_even
gdma_stop(uhci_ctrl->rx_dir.dma_chan);
gdma_reset(uhci_ctrl->rx_dir.dma_chan);
uhci_ctrl->rx_dir.rx_fsm = UHCI_RX_FSM_ENABLE;
atomic_store(&uhci_ctrl->rx_dir.rx_fsm, UHCI_RX_FSM_ENABLE);
uhci_ctrl->rx_dir.node_index = 0;
}
@@ -378,10 +378,11 @@ esp_err_t uhci_receive(uhci_controller_handle_t uhci_ctrl, uint8_t *read_buffer,
ESP_RETURN_ON_ERROR(esp_cache_msync(mount_configs[0].buffer, usable_size, ESP_CACHE_MSYNC_FLAG_DIR_M2C), TAG, "cache sync failed");
}
atomic_store(&uhci_ctrl->rx_dir.rx_fsm, UHCI_RX_FSM_RUN);
gdma_reset(uhci_ctrl->rx_dir.dma_chan);
gdma_start(uhci_ctrl->rx_dir.dma_chan, gdma_link_get_head_addr(uhci_ctrl->rx_dir.dma_link));
atomic_store(&uhci_ctrl->rx_dir.rx_fsm, UHCI_RX_FSM_RUN);
return ESP_OK;
}