[TG3]: Add mailbox read method

This patch adds the mailbox read method and also adds an inline function
tw32_mailbox_f() for mailbox writes that require read flush.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/net/tg3.h b/drivers/net/tg3.h
index 394acddd53b3..c398b8478d62 100644
--- a/drivers/net/tg3.h
+++ b/drivers/net/tg3.h
@@ -2051,6 +2051,7 @@ struct tg3 {
 
         u32                             (*read32) (struct tg3 *, u32);
         void                            (*write32) (struct tg3 *, u32, u32);
+        u32                             (*read32_mbox) (struct tg3 *, u32);
         void                            (*write32_mbox) (struct tg3 *, u32,
                                                          u32);
         void __iomem                    *regs;