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| author |  Jon Hunter <jonathanh@nvidia.com>
| 2023-04-05 19:18:53 +0100 |
|---|---|---|
| committer |  Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| 2023-04-20 10:02:55 +0200 |
| commit | 5629d31955297ca47b9283c64fff70f2f34aa528 (patch) | |
| tree | ba5cfa0fa4c40f64a243df65bab5bc3af54ed7cb /drivers/usb | |
| parent | Merge tag 'usb-serial-6.4-rc1' of https://git.kernel.org/pub/scm/linux/kernel... (diff) | |
| download | linux-5629d31955297ca47b9283c64fff70f2f34aa528.tar.gz linux-5629d31955297ca47b9283c64fff70f2f34aa528.tar.bz2 linux-5629d31955297ca47b9283c64fff70f2f34aa528.zip | |
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 <treding@nvidia.com>
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Link: https://lore.kernel.org/r/20230405181854.42355-1-jonathanh@nvidia.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/gadget/udc/tegra-xudc.c | 2 |
1 files changed, 1 insertions, 1 deletions
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; |