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spi: rzv2h-rspi: Fix DMA transfer error handling for signal interruption

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wait_event_interruptible_timeout() can return a negative error code when
interrupted by a signal. The original code treated all non-zero return
values as success, which would incorrectly synchronize DMA channels and
return 0 instead of propagating the interruption error.

Fixes: fa08b56686 ("spi: rzv2h-rspi: add support for DMA mode")
Signed-off-by: Felix Gu <ustc.gu@gmail.com>
Reviewed-by: Cosmin Tanislav <cosmin-gabriel.tanislav.xa@renesas.com>
Tested-by: Cosmin Tanislav <cosmin-gabriel.tanislav.xa@renesas.com>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://patch.msgid.link/20260627-rspi-v1-1-170c93ee14da@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Felix Gu 2026-06-27 00:02:29 +08:00 committed by Mark Brown
parent eeda4e1e6d
commit 7fc2c3dcae
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1 changed files with 2 additions and 2 deletions
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4
drivers/spi/spi-rzv2h-rspi.c
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@ -365,14 +365,14 @@ static int rzv2h_rspi_transfer_dma(struct rzv2h_rspi_priv *rspi,
rzv2h_rspi_clear_all_irqs(rspi);
ret = wait_event_interruptible_timeout(rspi->wait, rspi->dma_callbacked, HZ);
if (ret) {
if (ret > 0) {
dmaengine_synchronize(rspi->controller->dma_tx);
dmaengine_synchronize(rspi->controller->dma_rx);
ret = 0;
} else {
dmaengine_terminate_sync(rspi->controller->dma_tx);
dmaengine_terminate_sync(rspi->controller->dma_rx);
ret = -ETIMEDOUT;
ret = ret ?: -ETIMEDOUT;
}
enable_irq(rspi->irq_rx);