pcnet32: Remove pointless memory barriers
These two memory barriers in performance-critical paths are not needed
on x86. Even if some other architecture does buffer PCI I/O space
writes, the existing memory-mapped I/O barriers are unlikely to be what
is needed.
Signed-off-by: John Dykstra <john.dykstra1@gmail.com>
Acked-by: Don Fry <pcnet32@verizon.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/pcnet32.c b/drivers/net/pcnet32.c
index e5e8c59..1c35e1d 100644
--- a/drivers/net/pcnet32.c
+++ b/drivers/net/pcnet32.c
@@ -1405,7 +1405,7 @@
/* Set interrupt enable. */
lp->a.write_csr(ioaddr, CSR0, CSR0_INTEN);
- mmiowb();
+
spin_unlock_irqrestore(&lp->lock, flags);
}
return work_done;
@@ -2597,7 +2597,7 @@
val = lp->a.read_csr(ioaddr, CSR3);
val |= 0x5f00;
lp->a.write_csr(ioaddr, CSR3, val);
- mmiowb();
+
__napi_schedule(&lp->napi);
break;
}