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spi: spi-pic32: Fix issue with uninitialized dma_slave_config 

Depending on the DMA driver being used, the struct dma_slave_config may
need to be initialized to zero for the unused data.

For example, we have three DMA drivers using src_port_window_size and
dst_port_window_size. If these are left uninitialized, it can cause DMA
failures.

For spi-pic32, this is probably not currently an issue but is still good to
fix though.

Fixes: 1bcb9f8ceb ("spi: spi-pic32: Add PIC32 SPI master driver")
Cc: Purna Chandra Mandal <purna.mandal@microchip.com>
Cc: Peter Ujfalusi <peter.ujfalusi@gmail.com>
Cc: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Link: https://lore.kernel.org/r/20210810081727.19491-2-tony@atomide.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Tony Lindgren 2021-08-10 11:17:27 +03:00 committed by Mark Brown
parent 209ab223ad
commit 976c1de1de
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1 changed files with 1 additions and 0 deletions
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drivers/spi/spi-pic32.c
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@ -361,6 +361,7 @@ static int pic32_spi_dma_config(struct pic32_spi *pic32s, u32 dma_width)
struct dma_slave_config cfg;
int ret;
memset(&cfg, 0, sizeof(cfg));
cfg.device_fc = true;
cfg.src_addr = pic32s->dma_base + buf_offset;
cfg.dst_addr = pic32s->dma_base + buf_offset;