diff options
| author | Felipe Balbi <balbi@ti.com> | 2011-06-27 15:57:46 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-07-01 14:31:09 -0700 |
| commit | e4e5b136eb6f2d3aa10dca108a1b787dc92d67df (patch) | |
| tree | 17f45af2d69eed5da822b425d033b6a24af39423 | |
| parent | fc0b721f27beb5464d9fb5e521f5cd68127dd14e (diff) | |
usb: musb: be careful when using different fifo_modes
if we have more endpoints configured than
enabled on fifo_mode, then we need to be
careful on save/restore context operations,
otherwise we will try to access uninitialized
__iomem pointer.
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | drivers/usb/musb/musb_core.c | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c index c71b0372786e..b1faed7806f5 100644 --- a/drivers/usb/musb/musb_core.c +++ b/drivers/usb/musb/musb_core.c @@ -2214,7 +2214,16 @@ static void musb_save_context(struct musb *musb) musb->context.devctl = musb_readb(musb_base, MUSB_DEVCTL); for (i = 0; i < musb->config->num_eps; ++i) { - epio = musb->endpoints[i].regs; + struct musb_hw_ep *hw_ep; + + hw_ep = &musb->endpoints[i]; + if (!hw_ep) + continue; + + epio = hw_ep->regs; + if (!epio) + continue; + musb->context.index_regs[i].txmaxp = musb_readw(epio, MUSB_TXMAXP); musb->context.index_regs[i].txcsr = @@ -2280,7 +2289,16 @@ static void musb_restore_context(struct musb *musb) musb_writeb(musb_base, MUSB_DEVCTL, musb->context.devctl); for (i = 0; i < musb->config->num_eps; ++i) { - epio = musb->endpoints[i].regs; + struct musb_hw_ep *hw_ep; + + hw_ep = &musb->endpoints[i]; + if (!hw_ep) + continue; + + epio = hw_ep->regs; + if (!epio) + continue; + musb_writew(epio, MUSB_TXMAXP, musb->context.index_regs[i].txmaxp); musb_writew(epio, MUSB_TXCSR, |