The patch below does not apply to the 3.10-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@xxxxxxxxxxxxxxx>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
>From eee3f15d5f1f4f0c283dd4db67dc1b874a2852d1 Mon Sep 17 00:00:00 2001
From: Felipe Balbi <balbi@xxxxxx>
Date: Tue, 25 Feb 2014 10:58:43 -0600
Subject: [PATCH] usb: musb: avoid NULL pointer dereference
instead of relying on the otg pointer, which
can be NULL in certain cases, we can use the
gadget and host pointers we already hold inside
struct musb.
Cc: <stable@xxxxxxxxxxxxxxx>
Tested-by: Tony Lindgren <tony@xxxxxxxxxxx>
Signed-off-by: Felipe Balbi <balbi@xxxxxx>
diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
index fc192ad9cc6a..6c1dd42e5894 100644
--- a/drivers/usb/musb/musb_core.c
+++ b/drivers/usb/musb/musb_core.c
@@ -438,7 +438,6 @@ void musb_hnp_stop(struct musb *musb)
static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb,
u8 devctl)
{
- struct usb_otg *otg = musb->xceiv->otg;
irqreturn_t handled = IRQ_NONE;
dev_dbg(musb->controller, "<== DevCtl=%02x, int_usb=0x%x\n", devctl,
@@ -653,7 +652,7 @@ static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb,
break;
case OTG_STATE_B_PERIPHERAL:
musb_g_suspend(musb);
- musb->is_active = otg->gadget->b_hnp_enable;
+ musb->is_active = musb->g.b_hnp_enable;
if (musb->is_active) {
musb->xceiv->state = OTG_STATE_B_WAIT_ACON;
dev_dbg(musb->controller, "HNP: Setting timer for b_ase0_brst\n");
@@ -669,7 +668,7 @@ static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb,
break;
case OTG_STATE_A_HOST:
musb->xceiv->state = OTG_STATE_A_SUSPEND;
- musb->is_active = otg->host->b_hnp_enable;
+ musb->is_active = musb->hcd->self.b_hnp_enable;
break;
case OTG_STATE_B_HOST:
/* Transition to B_PERIPHERAL, see 6.8.2.6 p 44 */
--
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