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Subject[PATCH 03/30] spi: dw: Initialize n_bytes before the memory barrier
Date
Since n_bytes field of the DW SPI private data is also utilized by the
IRQ handler, we need to make sure it' initialization is done before the
memory barrier.

Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
---
drivers/spi/spi-dw-core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/spi/spi-dw-core.c b/drivers/spi/spi-dw-core.c
index 8b3ce5a0378a..1af74362461d 100644
--- a/drivers/spi/spi-dw-core.c
+++ b/drivers/spi/spi-dw-core.c
@@ -299,6 +299,7 @@ static int dw_spi_transfer_one(struct spi_controller *master,

dws->dma_mapped = 0;
spin_lock_irqsave(&dws->buf_lock, flags);
+ dws->n_bytes = DIV_ROUND_UP(transfer->bits_per_word, BITS_PER_BYTE);
dws->tx = (void *)transfer->tx_buf;
dws->tx_end = dws->tx + transfer->len;
dws->rx = transfer->rx_buf;
@@ -323,7 +324,6 @@ static int dw_spi_transfer_one(struct spi_controller *master,
}

transfer->effective_speed_hz = dws->max_freq / chip->clk_div;
- dws->n_bytes = DIV_ROUND_UP(transfer->bits_per_word, BITS_PER_BYTE);

cr0 = dws->update_cr0(master, spi, transfer);
dw_writel(dws, DW_SPI_CTRLR0, cr0);
--
2.27.0
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