diff options
Diffstat (limited to 'drivers/net/wireless/ath/ath11k/dbring.c')
| -rw-r--r-- | drivers/net/wireless/ath/ath11k/dbring.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ath11k/dbring.c b/drivers/net/wireless/ath/ath11k/dbring.c index de220a10bce3..eda67ebfc4c2 100644 --- a/drivers/net/wireless/ath/ath11k/dbring.c +++ b/drivers/net/wireless/ath/ath11k/dbring.c @@ -6,6 +6,35 @@ #include "core.h" #include "debug.h" +#define ATH11K_DB_MAGIC_VALUE 0xdeadbeaf + +int ath11k_dbring_validate_buffer(struct ath11k *ar, void *buffer, u32 size) +{ + u32 *temp; + int idx; + + size = size >> 2; + + for (idx = 0, temp = buffer; idx < size; idx++, temp++) { + if (*temp == ATH11K_DB_MAGIC_VALUE) + return -EINVAL; + } + + return 0; +} + +static void ath11k_dbring_fill_magic_value(struct ath11k *ar, + void *buffer, u32 size) +{ + u32 *temp; + int idx; + + size = size >> 2; + + for (idx = 0, temp = buffer; idx < size; idx++, temp++) + *temp++ = ATH11K_DB_MAGIC_VALUE; +} + static int ath11k_dbring_bufs_replenish(struct ath11k *ar, struct ath11k_dbring *ring, struct ath11k_dbring_element *buff) @@ -26,6 +55,7 @@ static int ath11k_dbring_bufs_replenish(struct ath11k *ar, ptr_unaligned = buff->payload; ptr_aligned = PTR_ALIGN(ptr_unaligned, ring->buf_align); + ath11k_dbring_fill_magic_value(ar, ptr_aligned, ring->buf_sz); paddr = dma_map_single(ab->dev, ptr_aligned, ring->buf_sz, DMA_FROM_DEVICE); |