spi: zynqmp_qspi: Change flush cache to invalidate cache

Before DMA read, ideally cache should be invalidated, so that data from
memory will be updated to cache after DMA is completed. But
flush_dcache_range is being used which is incorrect. Change
flush_dcache_range to invalidate_dcache_range.

Signed-off-by: Ashok Reddy Soma <ashok.reddy.soma@amd.com>
Signed-off-by: Venkatesh Yadav Abbarapu <venkatesh.abbarapu@amd.com>
Link: https://lore.kernel.org/r/20230915031759.28889-2-venkatesh.abbarapu@amd.com
Signed-off-by: Michal Simek <michal.simek@amd.com>

diff --git a/drivers/spi/zynqmp_gqspi.c b/drivers/spi/zynqmp_gqspi.c
index c4aee279aa42aad053fa7182d55af87ed08c863f..a506d152275e792446b5fd135774740b223e686f 100644 (file)
--- a/drivers/spi/zynqmp_gqspi.c
+++ b/drivers/spi/zynqmp_gqspi.c
@@ -690,7 +690,7 @@ static int zynqmp_qspi_start_dma(struct zynqmp_qspi_priv *priv,
                writel(GQSPI_DMA_DST_I_STS_MASK, &dma_regs->dmaier);
                addr = (unsigned long)buf;
                size = roundup(priv->len, GQSPI_DMA_ALIGN);
-               flush_dcache_range(addr, addr + size);
+               invalidate_dcache_range(addr, addr + size);
 
                while (priv->len) {
                        zynqmp_qspi_calc_exp(priv, &gen_fifo_cmd);