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modem: backends: isr: notify remaining RX bytes #97132

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Merged
merged 1 commit into from
Oct 9, 2025
+8 −2
Merged

modem: backends: isr: notify remaining RX bytes #97132

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10 changes: 8 additions & 2 deletions subsys/modem/backends/modem_backend_uart_isr.c
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Original file line number Diff line number Diff line change
Expand Up @@ -207,6 +207,8 @@ static int modem_backend_uart_isr_receive(void *data, uint8_t *buf, size_t size)
read_bytes += ring_buf_get(&backend->isr.receive_rdb[receive_rdb_unused], buf, size);

if (ring_buf_is_empty(&backend->isr.receive_rdb[receive_rdb_unused]) == false) {
/* More data available in the buffer */
k_work_schedule(&backend->receive_ready_work, K_NO_WAIT);
return (int)read_bytes;
}

Expand All @@ -218,8 +220,12 @@ static int modem_backend_uart_isr_receive(void *data, uint8_t *buf, size_t size)
/* Read data from previously used buffer */
receive_rdb_unused = (backend->isr.receive_rdb_used == 1) ? 0 : 1;

read_bytes += ring_buf_get(&backend->isr.receive_rdb[receive_rdb_unused],
&buf[read_bytes], (size - read_bytes));
read_bytes += ring_buf_get(&backend->isr.receive_rdb[receive_rdb_unused], &buf[read_bytes],
(size - read_bytes));
if (ring_buf_is_empty(&backend->isr.receive_rdb[receive_rdb_unused]) == false) {
/* More data available in the buffer */
k_work_schedule(&backend->receive_ready_work, K_NO_WAIT);
}

return (int)read_bytes;
}
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