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| author | Tony Lindgren <tony@atomide.com> | 2021-08-10 11:16:43 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-09-22 11:47:54 +0200 |
| commit | 8dedc73c5edbcf909434783f5195beec3fe85bec (patch) | |
| tree | 53028b64936a4df504a5ea3f8c32255901c7f572 /drivers | |
| parent | 92680bc8f0b2f0c90590cab16505e1892b700ed7 (diff) | |
| download | linux-stable-8dedc73c5edbcf909434783f5195beec3fe85bec.tar.gz linux-stable-8dedc73c5edbcf909434783f5195beec3fe85bec.tar.bz2 linux-stable-8dedc73c5edbcf909434783f5195beec3fe85bec.zip | |
mmc: dw_mmc: Fix issue with uninitialized dma_slave_config
[ Upstream commit c3ff0189d3bc9c03845fe37472c140f0fefd0c79 ]
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 dw_mmc, this is probably not currently an issue but is still good to
fix though.
Fixes: 3fc7eaef44db ("mmc: dw_mmc: Add external dma interface support")
Cc: Shawn Lin <shawn.lin@rock-chips.com>
Cc: Jaehoon Chung <jh80.chung@samsung.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/20210810081644.19353-2-tony@atomide.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mmc/host/dw_mmc.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c index 8e09586f880f..e3991df078ef 100644 --- a/drivers/mmc/host/dw_mmc.c +++ b/drivers/mmc/host/dw_mmc.c @@ -808,6 +808,7 @@ static int dw_mci_edmac_start_dma(struct dw_mci *host, int ret = 0; /* Set external dma config: burst size, burst width */ + memset(&cfg, 0, sizeof(cfg)); cfg.dst_addr = host->phy_regs + fifo_offset; cfg.src_addr = cfg.dst_addr; cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; |