sfc: Remove redundant memory barriers between MMIOs

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>

1 files changed, 0 insertions, 5 deletions

diff --git a/drivers/net/sfc/io.h b/drivers/net/sfc/io.h
index 0764e84ecc41..896b31e8606d 100644
--- a/drivers/net/sfc/io.h
+++ b/drivers/net/sfc/io.h
@@ -96,13 +96,11 @@ static inline void efx_writeo(struct efx_nic *efx, efx_oword_t *value,
         spin_lock_irqsave(&efx->biu_lock, flags);
 #ifdef EFX_USE_QWORD_IO
         _efx_writeq(efx, value->u64[0], reg + 0);
-        wmb();
         _efx_writeq(efx, value->u64[1], reg + 8);
 #else
         _efx_writed(efx, value->u32[0], reg + 0);
         _efx_writed(efx, value->u32[1], reg + 4);
         _efx_writed(efx, value->u32[2], reg + 8);
-        wmb();
         _efx_writed(efx, value->u32[3], reg + 12);
 #endif
         mmiowb();
@@ -125,7 +123,6 @@ static inline void efx_sram_writeq(struct efx_nic *efx, void __iomem *membase,
         __raw_writeq((__force u64)value->u64[0], membase + addr);
 #else
         __raw_writel((__force u32)value->u32[0], membase + addr);
-        wmb();
         __raw_writel((__force u32)value->u32[1], membase + addr + 4);
 #endif
         mmiowb();
@@ -152,7 +149,6 @@ static inline void efx_reado(struct efx_nic *efx, efx_oword_t *value,
 
         spin_lock_irqsave(&efx->biu_lock, flags);
         value->u32[0] = _efx_readd(efx, reg + 0);
-        rmb();
         value->u32[1] = _efx_readd(efx, reg + 4);
         value->u32[2] = _efx_readd(efx, reg + 8);
         value->u32[3] = _efx_readd(efx, reg + 12);
@@ -175,7 +171,6 @@ static inline void efx_sram_readq(struct efx_nic *efx, void __iomem *membase,
         value->u64[0] = (__force __le64)__raw_readq(membase + addr);
 #else
         value->u32[0] = (__force __le32)__raw_readl(membase + addr);
-        rmb();
         value->u32[1] = (__force __le32)__raw_readl(membase + addr + 4);
 #endif
         spin_unlock_irqrestore(&efx->biu_lock, flags);