dmaengine: dw-axi-dmac: Fix uninitialized variable in axi_chan_block_xfer_start()

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 initializing the structure to 0 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.

Fixes: 8243516 ("dmaengine: dw-axi-dmac: support DMAX_NUM_CHANNELS > 8")
Cc: Eugeniy Paltsev <[email protected]>
Cc: Vinod Koul <[email protected]>
Cc: [email protected]
Cc: [email protected]
Signed-off-by: Tim Gardner <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Vinod Koul <[email protected]>

Author: rtg-canonical

drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c

@@ -373,7 +373,7 @@ static void axi_chan_block_xfer_start(struct axi_dma_chan *chan,
 				      struct axi_dma_desc *first)
 {
 	u32 priority = chan->chip->dw->hdata->priority[chan->id];
-	struct axi_dma_chan_config config;
+	struct axi_dma_chan_config config = {};
 	u32 irq_mask;
 	u8 lms = 0; /* Select AXI0 master for LLI fetching */
 
@@ -391,7 +391,7 @@ static void axi_chan_block_xfer_start(struct axi_dma_chan *chan,
 	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);