From: Jon Hunter <jonathanh@xxxxxxxxxx>
[ Upstream commit 5629d31955297ca47b9283c64fff70f2f34aa528 ]
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 <treding@xxxxxxxxxx>
Signed-off-by: Jon Hunter <jonathanh@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20230405181854.42355-1-jonathanh@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
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 cb4ddfa52cb0f..1cb4258077bd3 100644
--- a/drivers/usb/gadget/udc/tegra-xudc.c
+++ b/drivers/usb/gadget/udc/tegra-xudc.c
@@ -2154,7 +2154,7 @@ 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;
--
2.39.2
