tree 3af15b058a217f2411329711511870b736485386
parent e8164f64caff68d4e878e1719d88d145faa75f1d
author Anand Gadiyar <gadiyar@ti.com> 1219330260 +0530
committer Greg Kroah-Hartman <gregkh@suse.de> 1219339594 -0700

MUSB: Fix index register corruption seen with g_ether and Windows host

If Indexed Mode register accesses are enabled, the ep0_rxstate()
function calls musb_g_ep0_giveback() before writing to the CSR
register. When control returns to this ep0_rxstate, the index
register contents are over-written. This causes the CSR register
write to fail.

Fixed by writing the correct value into the index register before
writing to the CSR.

This was observed only in ep0_rxstate() with g_ether loaded and
the device connected to a MS Windows host PC. Anticipatively fixed
ep0_txstate() as well.

Signed-off-by: Anand Gadiyar <gadiyar@ti.com>
Acked-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>