This is a note to let you know that I've just added the patch titled

xhci: tegra: Prevent error pointer dereference

to my usb git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git in the usb-testing branch.

The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)

The patch will be merged to the usb-next branch sometime soon, after it passes testing, and the merge window is open.

If you have any questions about this process, please let me know.

From 0326ccb5feac6eac35ba6254260e2774277cd976 Mon Sep 17 00:00:00 2001

From: Thierry Reding treding@nvidia.com Date: Wed, 20 Feb 2019 14:48:41 +0100 Subject: xhci: tegra: Prevent error pointer dereference

During initialization, the host and super-speed power domains will contain an ERR_PTR() encoded error code rather than being NULL. To avoid a crash, use a !IS_ERR_OR_NULL() condition during cleanup.

Signed-off-by: Thierry Reding treding@nvidia.com Fixes: 6494a9ad86de ("usb: xhci: tegra: Add genpd support") Cc: stable stable@vger.kernel.org Reviewed-by: Jon Hunter jonathanh@nvidia.com Acked-by: Mathias Nyman mathias.nyman@linux.intel.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/usb/host/xhci-tegra.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/host/xhci-tegra.c b/drivers/usb/host/xhci-tegra.c index 938ff06c0349..efb0cad8710e 100644 --- a/drivers/usb/host/xhci-tegra.c +++ b/drivers/usb/host/xhci-tegra.c @@ -941,9 +941,9 @@ static void tegra_xusb_powerdomain_remove(struct device *dev, device_link_del(tegra->genpd_dl_ss); if (tegra->genpd_dl_host) device_link_del(tegra->genpd_dl_host); - if (tegra->genpd_dev_ss) + if (!IS_ERR_OR_NULL(tegra->genpd_dev_ss)) dev_pm_domain_detach(tegra->genpd_dev_ss, true); - if (tegra->genpd_dev_host) + if (!IS_ERR_OR_NULL(tegra->genpd_dev_host)) dev_pm_domain_detach(tegra->genpd_dev_host, true); }