MCS7830 USB-Ether: change register define

ChangeLog:
- rename register, add comment

Signed-off-by: Andreas Mohr <andi@lisas.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/net/usb/mcs7830.c b/drivers/net/usb/mcs7830.c
index cb164d6c9b51..36a029218e3d 100644
--- a/drivers/net/usb/mcs7830.c
+++ b/drivers/net/usb/mcs7830.c
@@ -85,6 +85,7 @@ enum {
            HIF_REG_PHY_CMD2_PEND_FLAG_BIT       = 0x80,
            HIF_REG_PHY_CMD2_READY_FLAG_BIT      = 0x40,
         HIF_REG_CONFIG                          = 0x0e,
+        /* hmm, spec sez: "R/W", "Except bit 3" (likely TXENABLE). */
            HIF_REG_CONFIG_CFG                   = 0x80,
            HIF_REG_CONFIG_SPEED100              = 0x40,
            HIF_REG_CONFIG_FULLDUPLEX_ENABLE     = 0x20,
@@ -94,7 +95,7 @@ enum {
            HIF_REG_CONFIG_ALLMULTICAST          = 0x02,
            HIF_REG_CONFIG_PROMISCUOUS           = 0x01,
         HIF_REG_ETHERNET_ADDR                   = 0x0f,
-        HIF_REG_22                              = 0x15,
+        HIF_REG_FRAME_DROP_COUNTER              = 0x15, /* 0..ff; reset: 0 */
         HIF_REG_PAUSE_THRESHOLD                 = 0x16,
            HIF_REG_PAUSE_THRESHOLD_DEFAULT      = 0,
 };
@@ -334,7 +335,7 @@ static int mcs7830_get_rev(struct usbnet *dev)
 {
         u8 dummy[2];
         int ret;
-        ret = mcs7830_get_reg(dev, HIF_REG_22, 2, dummy);
+        ret = mcs7830_get_reg(dev, HIF_REG_FRAME_DROP_COUNTER, 2, dummy);
         if (ret > 0)
                 return 2; /* Rev C or later */
         return 1; /* earlier revision */