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drivers: dma_mcux_lpc: Fix potential NULL pointer dereferences

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Dereference variables after NULL checking.

Signed-off-by: Jacob Siverskog <jacob@teenage.engineering>
This commit is contained in:
Jacob Siverskog 2023-06-06 16:10:37 +02:00 committed by Anas Nashif
parent d17d28aa58
commit 9a26ab44fb
1 changed files with 11 additions and 5 deletions
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16
drivers/dma/dma_mcux_lpc.c
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@ -259,25 +259,31 @@ static int dma_mcux_lpc_queue_descriptors(struct channel_data *data,
static int dma_mcux_lpc_configure(const struct device *dev, uint32_t channel,
struct dma_config *config)
{
const struct dma_mcux_lpc_config *dev_config = dev->config;
const struct dma_mcux_lpc_config *dev_config;
dma_handle_t *p_handle;
uint32_t xfer_config = 0U;
struct channel_data *data;
struct dma_mcux_lpc_dma_data *dma_data = dev->data;
struct dma_block_config *block_config = config->head_block;
struct dma_mcux_lpc_dma_data *dma_data;
struct dma_block_config *block_config;
uint32_t virtual_channel;
uint32_t total_dma_channels;
uint8_t otrig_index;
uint8_t src_inc, dst_inc;
bool is_periph = true;
uint8_t width = MIN(config->source_data_size, config->dest_data_size);
uint32_t max_xfer = NXP_LPC_DMA_MAX_XFER * width;
uint8_t width;
uint32_t max_xfer;
uint8_t reload = 0;
if (NULL == dev || NULL == config) {
return -EINVAL;
}
dev_config = dev->config;
dma_data = dev->data;
block_config = config->head_block;
width = MIN(config->source_data_size, config->dest_data_size);
max_xfer = NXP_LPC_DMA_MAX_XFER * width;
/*
* Check if circular mode is requested.
*/