diff options
author | Paul Cercueil <paul@crapouillou.net> | 2022-10-26 21:26:53 +0300 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-11-09 14:39:13 +0300 |
commit | a6d45ea063f0a9272f62925c8150439af5640e74 (patch) | |
tree | a3bc834afb783a3df0ed7045b6876786131b15ee /drivers/usb/musb/musb_gadget.c | |
parent | 285f28bfed89a56ed619054f21125b0bd2f0d4d6 (diff) | |
download | linux-a6d45ea063f0a9272f62925c8150439af5640e74.tar.xz |
usb: musb: Allow running without CONFIG_USB_PHY
Modify the core so that musb->xceiv is never deferenced without being
checked first.
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Link: https://lore.kernel.org/r/20221026182657.146630-4-paul@crapouillou.net
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/musb/musb_gadget.c')
-rw-r--r-- | drivers/usb/musb/musb_gadget.c | 21 |
1 files changed, 13 insertions, 8 deletions
diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c index 9f5c531de387..66c8b32b16bb 100644 --- a/drivers/usb/musb/musb_gadget.c +++ b/drivers/usb/musb/musb_gadget.c @@ -1552,9 +1552,11 @@ static int musb_gadget_wakeup(struct usb_gadget *gadget) break; } - spin_unlock_irqrestore(&musb->lock, flags); - otg_start_srp(musb->xceiv->otg); - spin_lock_irqsave(&musb->lock, flags); + if (musb->xceiv) { + spin_unlock_irqrestore(&musb->lock, flags); + otg_start_srp(musb->xceiv->otg); + spin_lock_irqsave(&musb->lock, flags); + } /* Block idling for at least 1s */ musb_platform_try_idle(musb, @@ -1628,7 +1630,7 @@ static int musb_gadget_vbus_draw(struct usb_gadget *gadget, unsigned mA) { struct musb *musb = gadget_to_musb(gadget); - if (!musb->xceiv->set_power) + if (!musb->xceiv || !musb->xceiv->set_power) return -EOPNOTSUPP; return usb_phy_set_power(musb->xceiv, mA); } @@ -1834,7 +1836,6 @@ static int musb_gadget_start(struct usb_gadget *g, struct usb_gadget_driver *driver) { struct musb *musb = gadget_to_musb(g); - struct usb_otg *otg = musb->xceiv->otg; unsigned long flags; int retval = 0; @@ -1851,7 +1852,9 @@ static int musb_gadget_start(struct usb_gadget *g, spin_lock_irqsave(&musb->lock, flags); musb->is_active = 1; - otg_set_peripheral(otg, &musb->g); + if (musb->xceiv) + otg_set_peripheral(musb->xceiv->otg, &musb->g); + musb_set_state(musb, OTG_STATE_B_IDLE); spin_unlock_irqrestore(&musb->lock, flags); @@ -1861,7 +1864,7 @@ static int musb_gadget_start(struct usb_gadget *g, * handles power budgeting ... this way also * ensures HdrcStart is indirectly called. */ - if (musb->xceiv->last_event == USB_EVENT_ID) + if (musb->xceiv && musb->xceiv->last_event == USB_EVENT_ID) musb_platform_set_vbus(musb, 1); pm_runtime_mark_last_busy(musb->controller); @@ -1899,7 +1902,9 @@ static int musb_gadget_stop(struct usb_gadget *g) musb_set_state(musb, OTG_STATE_UNDEFINED); musb_stop(musb); - otg_set_peripheral(musb->xceiv->otg, NULL); + + if (musb->xceiv) + otg_set_peripheral(musb->xceiv->otg, NULL); musb->is_active = 0; musb->gadget_driver = NULL; |