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spi: dw: Initialize n_bytes before the memory barrier

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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>
Link: https://lore.kernel.org/r/20200920112914.26501-4-Sergey.Semin@baikalelectronics.ru
Signed-off-by: Mark Brown <broonie@kernel.org>
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Serge Semin 2020-09-20 14:28:47 +03:00 committed by Mark Brown
parent 07918df724
commit 8225c1c9a0
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GPG key ID: 24D68B725D5487D0
1 changed files with 1 additions and 1 deletions
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2
drivers/spi/spi-dw-core.c
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@ -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);