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dm9601: fix phy/eeprom write routine 

Use correct bit positions in DM_SHARED_CTRL register for writes.

Michael Planes recently encountered a 'KY-RS9600 USB-LAN converter', which
came with a driver CD containing a Linux driver. This driver turns out to
be a copy of dm9601.c with symbols renamed and my copyright stripped.
That aside, it did contain 1 functional change in dm_write_shared_word(),
and after checking the datasheet the original value was indeed wrong
(read versus write bits).

On Michaels HW, this change bumps receive speed from ~30KB/s to ~900KB/s.
On other devices the difference is less spectacular, but still significant
(~30%).

Reported-by: Michael Planes <michael.planes@free.fr>
CC: stable@kernel.org
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Peter Korsgaard 2010-05-03 10:01:26 +00:00 committed by David S. Miller
parent 19937d0482
commit e9162ab161
1 changed files with 1 additions and 1 deletions
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2
drivers/net/usb/dm9601.c
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@ -240,7 +240,7 @@ static int dm_write_shared_word(struct usbnet *dev, int phy, u8 reg, __le16 valu
goto out;
dm_write_reg(dev, DM_SHARED_ADDR, phy ? (reg | 0x40) : reg);
dm_write_reg(dev, DM_SHARED_CTRL, phy ? 0x1c : 0x14);
dm_write_reg(dev, DM_SHARED_CTRL, phy ? 0x1a : 0x12);
for (i = 0; i < DM_TIMEOUT; i++) {
u8 tmp;