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path: root/drivers/dma/stm32-dma.c
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Diffstat (limited to 'drivers/dma/stm32-dma.c')
-rw-r--r--drivers/dma/stm32-dma.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/dma/stm32-dma.c b/drivers/dma/stm32-dma.c
index 72d83cd9ed6b..90857d08a1a7 100644
--- a/drivers/dma/stm32-dma.c
+++ b/drivers/dma/stm32-dma.c
@@ -1246,8 +1246,8 @@ static struct dma_async_tx_descriptor *stm32_dma_prep_dma_memcpy(
enum dma_slave_buswidth max_width;
struct stm32_dma_desc *desc;
size_t xfer_count, offset;
- u32 num_sgs, best_burst, dma_burst, threshold;
- int i;
+ u32 num_sgs, best_burst, threshold;
+ int dma_burst, i;
num_sgs = DIV_ROUND_UP(len, STM32_DMA_ALIGNED_MAX_DATA_ITEMS);
desc = kzalloc(struct_size(desc, sg_req, num_sgs), GFP_NOWAIT);
@@ -1266,6 +1266,10 @@ static struct dma_async_tx_descriptor *stm32_dma_prep_dma_memcpy(
best_burst = stm32_dma_get_best_burst(len, STM32_DMA_MAX_BURST,
threshold, max_width);
dma_burst = stm32_dma_get_burst(chan, best_burst);
+ if (dma_burst < 0) {
+ kfree(desc);
+ return NULL;
+ }
stm32_dma_clear_reg(&desc->sg_req[i].chan_reg);
desc->sg_req[i].chan_reg.dma_scr =