diff options
Diffstat (limited to 'include/asm-arm/arch-iop13xx/adma.h')
| -rw-r--r-- | include/asm-arm/arch-iop13xx/adma.h | 18 |
1 files changed, 7 insertions, 11 deletions
diff --git a/include/asm-arm/arch-iop13xx/adma.h b/include/asm-arm/arch-iop13xx/adma.h index 90d14ee564f5..ef4f5da2029f 100644 --- a/include/asm-arm/arch-iop13xx/adma.h +++ b/include/asm-arm/arch-iop13xx/adma.h @@ -198,17 +198,13 @@ iop_chan_memset_slot_count(size_t len, int *slots_per_op) static inline int iop_chan_xor_slot_count(size_t len, int src_cnt, int *slots_per_op) { - int num_slots; - /* slots_to_find = 1 for basic descriptor + 1 per 4 sources above 1 - * (1 source => 8 bytes) (1 slot => 32 bytes) - */ - num_slots = 1 + (((src_cnt - 1) << 3) >> 5); - if (((src_cnt - 1) << 3) & 0x1f) - num_slots++; - - *slots_per_op = num_slots; - - return num_slots; + static const char slot_count_table[] = { 1, 2, 2, 2, + 2, 3, 3, 3, + 3, 4, 4, 4, + 4, 5, 5, 5, + }; + *slots_per_op = slot_count_table[src_cnt - 1]; + return *slots_per_op; } #define ADMA_MAX_BYTE_COUNT (16 * 1024 * 1024) |