From: Vivek Gautam <gautam.vi...@samsung.com>
In 71c731a: usb: host: xhci: Fix Compliance Mode on SN65LVPE502CP Hardware
when extracting DMI strings (vendor or product_name) to mark them as quirk
we may get NULL pointer in case of non-x86 systems which won't define
CONFIG_DMI. Hence susbsequent strstr() calls crash while driver probing.
So, returning 'false' here in case we get a NULL vendor or product_name.
This is tested with ARM (exynos) system.
This patch should be backported to stable kernels as old as 3.6, that
contain the commit 71c731a296f1b08a3724bd1b514b64f1bda87a23 "usb: host:
xhci: Fix Compliance Mode on SN65LVPE502CP Hardware"
Signed-off-by: Vivek Gautam <gautam.vi...@samsung.com>
Signed-off-by: Sarah Sharp <sarah.a.sh...@linux.intel.com>
Reported-by: Sebastian Gottschall (DD-WRT) <s.gottsch...@dd-wrt.com>
Cc: sta...@vger.kernel.org
---
drivers/usb/host/xhci.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 52b04b0..8d7fcbb 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -471,6 +471,8 @@ static bool compliance_mode_recovery_timer_quirk_check(void)
dmi_product_name = dmi_get_system_info(DMI_PRODUCT_NAME);
dmi_sys_vendor = dmi_get_system_info(DMI_SYS_VENDOR);
+ if (!dmi_product_name || !dmi_sys_vendor)
+ return false;
if (!(strstr(dmi_sys_vendor, "Hewlett-Packard")))
return false;
--
1.7.9
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