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Subject[PATCH] wilc1000: Remove misleading USE_SPI_DMA macro
Date
The USE_SPI_DMA macro name suggests that it could be set to 1 to
control whether or not SPI DMA should be used. However, that's not
what it does. If set to 1, it'll set the SPI messages'
"is_dma_mapped" flag to true, even though the tx/rx buffers aren't
actually DMA mapped by the driver. In other words, setting this flag
to 1 will break the driver.

Best to clean up this confusion by removing the macro altogether.
There is no need to explicitly initialize "is_dma_mapped" because the
message is cleared to zero anyhow, so "is_dma_mapped" is set to false
by default.

Signed-off-by: David Mosberger-Tang <davidm@egauge.net>
---
drivers/net/wireless/microchip/wilc1000/spi.c | 5 -----
1 file changed, 5 deletions(-)

diff --git a/drivers/net/wireless/microchip/wilc1000/spi.c b/drivers/net/wireless/microchip/wilc1000/spi.c
index 640850f989dd..1856525b9834 100644
--- a/drivers/net/wireless/microchip/wilc1000/spi.c
+++ b/drivers/net/wireless/microchip/wilc1000/spi.c
@@ -99,8 +99,6 @@ static int wilc_spi_reset(struct wilc *wilc);
#define DATA_PKT_LOG_SZ DATA_PKT_LOG_SZ_MAX
#define DATA_PKT_SZ (1 << DATA_PKT_LOG_SZ)

-#define USE_SPI_DMA 0
-
#define WILC_SPI_COMMAND_STAT_SUCCESS 0
#define WILC_GET_RESP_HDR_START(h) (((h) >> 4) & 0xf)

@@ -240,7 +238,6 @@ static int wilc_spi_tx(struct wilc *wilc, u8 *b, u32 len)
memset(&msg, 0, sizeof(msg));
spi_message_init(&msg);
msg.spi = spi;
- msg.is_dma_mapped = USE_SPI_DMA;
spi_message_add_tail(&tr, &msg);

ret = spi_sync(spi, &msg);
@@ -284,7 +281,6 @@ static int wilc_spi_rx(struct wilc *wilc, u8 *rb, u32 rlen)
memset(&msg, 0, sizeof(msg));
spi_message_init(&msg);
msg.spi = spi;
- msg.is_dma_mapped = USE_SPI_DMA;
spi_message_add_tail(&tr, &msg);

ret = spi_sync(spi, &msg);
@@ -323,7 +319,6 @@ static int wilc_spi_tx_rx(struct wilc *wilc, u8 *wb, u8 *rb, u32 rlen)
memset(&msg, 0, sizeof(msg));
spi_message_init(&msg);
msg.spi = spi;
- msg.is_dma_mapped = USE_SPI_DMA;

spi_message_add_tail(&tr, &msg);
ret = spi_sync(spi, &msg);
--
2.25.1
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