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spi: au1550: t->{tx,rx}_dma checks

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There are no more peripheral drivers that set t->tx_dma or t->rx_dma so
these will always == 0. Therefore, we can remove these checks since
they are always true.

Signed-off-by: David Lechner <dlechner@baylibre.com>
Link: https://msgid.link/r/20240328-spi-more-tx-rx-buf-cleanup-v1-1-9ec1ceedf08c@baylibre.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
David Lechner 2024-03-28 15:51:45 -05:00 committed by Mark Brown
parent a5bef84422
commit c2064672f1
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 10 additions and 19 deletions
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29
drivers/spi/spi-au1550.c
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@ -314,11 +314,8 @@ static int au1550_spi_dma_txrxb(struct spi_device *spi, struct spi_transfer *t)
hw->tx = t->tx_buf;
hw->rx = t->rx_buf;
dma_tx_addr = t->tx_dma;
dma_rx_addr = t->rx_dma;
/*
* check if buffers are already dma mapped, map them otherwise:
* - first map the TX buffer, so cache data gets written to memory
* - then map the RX buffer, so that cache entries (with
* soon-to-be-stale data) get removed
@ -326,23 +323,17 @@ static int au1550_spi_dma_txrxb(struct spi_device *spi, struct spi_transfer *t)
* use temp rx buffer (preallocated or realloc to fit) for rx dma
*/
if (t->tx_buf) {
if (t->tx_dma == 0) { /* if DMA_ADDR_INVALID, map it */
dma_tx_addr = dma_map_single(hw->dev,
(void *)t->tx_buf,
t->len, DMA_TO_DEVICE);
if (dma_mapping_error(hw->dev, dma_tx_addr))
dev_err(hw->dev, "tx dma map error\n");
}
dma_tx_addr = dma_map_single(hw->dev, (void *)t->tx_buf,
t->len, DMA_TO_DEVICE);
if (dma_mapping_error(hw->dev, dma_tx_addr))
dev_err(hw->dev, "tx dma map error\n");
}
if (t->rx_buf) {
if (t->rx_dma == 0) { /* if DMA_ADDR_INVALID, map it */
dma_rx_addr = dma_map_single(hw->dev,
(void *)t->rx_buf,
t->len, DMA_FROM_DEVICE);
if (dma_mapping_error(hw->dev, dma_rx_addr))
dev_err(hw->dev, "rx dma map error\n");
}
dma_rx_addr = dma_map_single(hw->dev, (void *)t->rx_buf,
t->len, DMA_FROM_DEVICE);
if (dma_mapping_error(hw->dev, dma_rx_addr))
dev_err(hw->dev, "rx dma map error\n");
} else {
if (t->len > hw->dma_rx_tmpbuf_size) {
int ret;
@ -398,10 +389,10 @@ static int au1550_spi_dma_txrxb(struct spi_device *spi, struct spi_transfer *t)
DMA_FROM_DEVICE);
}
/* unmap buffers if mapped above */
if (t->rx_buf && t->rx_dma == 0)
if (t->rx_buf)
dma_unmap_single(hw->dev, dma_rx_addr, t->len,
DMA_FROM_DEVICE);
if (t->tx_buf && t->tx_dma == 0)
if (t->tx_buf)
dma_unmap_single(hw->dev, dma_tx_addr, t->len,
DMA_TO_DEVICE);