From 5629d31955297ca47b9283c64fff70f2f34aa528 Mon Sep 17 00:00:00 2001 From: Jon Hunter Date: Wed, 5 Apr 2023 19:18:53 +0100 Subject: [PATCH] usb: gadget: tegra-xudc: Fix crash in vbus_draw Commit ac82b56bda5f ("usb: gadget: tegra-xudc: Add vbus_draw support") populated the vbus_draw callback for the Tegra XUDC driver. The function tegra_xudc_gadget_vbus_draw(), that was added by this commit, assumes that the pointer 'curr_usbphy' has been initialised, which is not always the case because this is only initialised when the USB role is updated. Fix this crash, by checking that the 'curr_usbphy' is valid before dereferencing. Fixes: ac82b56bda5f ("usb: gadget: tegra-xudc: Add vbus_draw support") Reviewed-by: Thierry Reding Signed-off-by: Jon Hunter Link: https://lore.kernel.org/r/20230405181854.42355-1-jonathanh@nvidia.com Signed-off-by: Greg Kroah-Hartman --- drivers/usb/gadget/udc/tegra-xudc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/usb/gadget/udc/tegra-xudc.c b/drivers/usb/gadget/udc/tegra-xudc.c index 2b71b33725f1..5bccd64847ff 100644 --- a/drivers/usb/gadget/udc/tegra-xudc.c +++ b/drivers/usb/gadget/udc/tegra-xudc.c @@ -2167,7 +2167,7 @@ static int tegra_xudc_gadget_vbus_draw(struct usb_gadget *gadget, dev_dbg(xudc->dev, "%s: %u mA\n", __func__, m_a); - if (xudc->curr_usbphy->chg_type == SDP_TYPE) + if (xudc->curr_usbphy && xudc->curr_usbphy->chg_type == SDP_TYPE) ret = usb_phy_set_power(xudc->curr_usbphy, m_a); return ret;