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platform: stm32: fix SPI DMA timeout underflow #3116

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platform: stm32: fix SPI DMA timeout underflow #3116

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ca24fef
platform: stm32: fix SPI DMA timeout underflow
morleman1 Jun 1, 2026
d284e42
platform: stm32: fix SPI DMA timeout underflow
morleman1 Jun 2, 2026
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9 changes: 5 additions & 4 deletions drivers/platform/stm32/stm32_spi.c
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Original file line number Diff line number Diff line change
Expand Up @@ -672,16 +672,17 @@ int32_t stm32_spi_transfer_dma(struct no_os_spi_desc* desc,
sdesc->stm32_spi_dma_done = false;
stm32_config_dma_and_start(desc, msgs, len, stm32_spi_dma_callback, desc);
timeout = msgs->bytes_number;
while (timeout--) {
while (timeout > 0) {
no_os_mdelay(1);
if (sdesc->stm32_spi_dma_done)
break;
timeout--;
};

/* need some cleanup here? */
if (timeout == 0)
if (!sdesc->stm32_spi_dma_done) {
/* need some cleanup here? */
return -ETIME;

}
return 0;
}

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6 changes: 3 additions & 3 deletions drivers/platform/stm32/stm32_xspi.c
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Original file line number Diff line number Diff line change
Expand Up @@ -693,14 +693,14 @@ static int32_t stm32_xspi_transfer_dma(struct no_os_spi_desc *desc,
return ret;

timeout = msgs->bytes_number;
while (timeout--) {
while (timeout > 0) {
no_os_mdelay(1);
if (sdesc->stm32_xspi_dma_done)
break;
timeout--;
};

/* need some cleanup here? */
if (timeout == 0) {
if (!sdesc->stm32_xspi_dma_done) {
no_os_dma_xfer_abort(sdesc->dma_desc, sdesc->dma_ch);
return -ETIME;
}
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