dm9601: fix phy/eeprom write routine
commit523bdd72c535f23103b6cc5d410ffa057af2c7f7
authorPeter Korsgaard <jacmet@sunsite.dk>
Mon, 3 May 2010 10:01:26 +0000 (3 10:01 +0000)
committerGreg Kroah-Hartman <gregkh@suse.de>
Wed, 12 May 2010 22:02:43 +0000 (12 15:02 -0700)
tree487847495d158f5404c2d5b3c1364884f5736a38
parent4bb6362e180555652885d52000fc156936b6ffe9
dm9601: fix phy/eeprom write routine

commit e9162ab1610531d6ea6c1833daeb2613e44275e8 upstream.

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>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/net/usb/dm9601.c