From: Greg KH on
2.6.33-stable review patch. If anyone has any objections, please let us know.


From: Peter Korsgaard <jacmet(a)>

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

Reported-by: Michael Planes <michael.planes(a)>
Signed-off-by: Peter Korsgaard <jacmet(a)>
Signed-off-by: David S. Miller <davem(a)>
Signed-off-by: Greg Kroah-Hartman <gregkh(a)>

drivers/net/usb/dm9601.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/usb/dm9601.c
+++ b/drivers/net/usb/dm9601.c
@@ -238,7 +238,7 @@ static int dm_write_shared_word(struct u
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;

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