On 19-10-21, 13:07, Tim Gardner wrote:
> Coverity complains of an uninitialized variable:
>
> 5. uninit_use_in_call: Using uninitialized value config.dst_per when calling axi_chan_config_write. [show details]
> 6. uninit_use_in_call: Using uninitialized value config.hs_sel_src when calling axi_chan_config_write. [show details]
> CID 121164 (#1-3 of 3): Uninitialized scalar variable (UNINIT)
> 7. uninit_use_in_call: Using uninitialized value config.src_per when calling axi_chan_config_write. [show details]
> 418 axi_chan_config_write(chan, &config);
>
> Fix this by clearing the structure which should at least be benign in axi_chan_config_write(). Also fix
> what looks like a cut-n-paste error when initializing config.hs_sel_dst.
Eugeniy?
>
> Fixes: 824351668a413 ("dmaengine: dw-axi-dmac: support DMAX_NUM_CHANNELS > 8")
> Cc: Eugeniy Paltsev <Eugeniy.Paltsev@xxxxxxxxxxxx>
> Cc: Vinod Koul <vkoul@xxxxxxxxxx>
> Cc: dmaengine@xxxxxxxxxxxxxxx
> Cc: linux-kernel@xxxxxxxxxxxxxxx
> Signed-off-by: Tim Gardner <tim.gardner@xxxxxxxxxxxxx>
> ---
> drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c b/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
> index 79572ec532ef..f47116e77ea1 100644
> --- a/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
> +++ b/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
> @@ -386,12 +386,13 @@ static void axi_chan_block_xfer_start(struct axi_dma_chan *chan,
>
> axi_dma_enable(chan->chip);
>
> + memset(&config, 0, sizeof(config));
pls init config while defining instead
struct axi_dma_chan_config config = {};
> config.dst_multblk_type = DWAXIDMAC_MBLK_TYPE_LL;
> config.src_multblk_type = DWAXIDMAC_MBLK_TYPE_LL;
> config.tt_fc = DWAXIDMAC_TT_FC_MEM_TO_MEM_DMAC;
> config.prior = priority;
> config.hs_sel_dst = DWAXIDMAC_HS_SEL_HW;
> - config.hs_sel_dst = DWAXIDMAC_HS_SEL_HW;
> + config.hs_sel_src = DWAXIDMAC_HS_SEL_HW;
> switch (chan->direction) {
> case DMA_MEM_TO_DEV:
> dw_axi_dma_set_byte_halfword(chan, true);
> --
> 2.33.1
--
~Vinod
