dmaengine: ste_dma40: Remove home-brew MAX() macro

The current implementation of the DMA40's local MAX() macro evaluates
its arguments more times than is necessary and it not type checked.
This patch strips replaces it with a new, more efficient constant.

Cc: Dan Williams <djbw@fb.com>
Cc: Per Forlin <per.forlin@stericsson.com>
Cc: Rabin Vincent <rabin@rab.in>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Reported-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 4 insertions, 3 deletions

diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c
index 63495f6a36f9..367ef15a3cd8 100644
--- a/drivers/dma/ste_dma40.c
+++ b/drivers/dma/ste_dma40.c
@@ -53,8 +53,6 @@
 #define D40_ALLOC_PHY           (1 << 30)
 #define D40_ALLOC_LOG_FREE      0
 
-#define MAX(a, b) (((a) < (b)) ? (b) : (a))
-
 /* Reserved event lines for memcpy only. */
 #define DB8500_DMA_MEMCPY_EV_0  51
 #define DB8500_DMA_MEMCPY_EV_1  56
@@ -216,6 +214,9 @@ static u32 d40_backup_regs_chan[] = {
         D40_CHAN_REG_SDLNK,
 };
 
+#define BACKUP_REGS_SZ_MAX ((BACKUP_REGS_SZ_V4A > BACKUP_REGS_SZ_V4B) ? \
+                             BACKUP_REGS_SZ_V4A : BACKUP_REGS_SZ_V4B)
+
 /**
  * struct d40_interrupt_lookup - lookup table for interrupt handler
  *
@@ -579,7 +580,7 @@ struct d40_base {
         resource_size_t                   lcpa_size;
         struct kmem_cache                *desc_slab;
         u32                               reg_val_backup[BACKUP_REGS_SZ];
-        u32                               reg_val_backup_v4[MAX(BACKUP_REGS_SZ_V4A, BACKUP_REGS_SZ_V4B)];
+        u32                               reg_val_backup_v4[BACKUP_REGS_SZ_MAX];
         u32                              *reg_val_backup_chan;
         u16                               gcc_pwr_off_mask;
         bool                              initialized;