lkml.org 
[lkml]   [2018]   [Nov]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 4.19 007/110] usb: dwc3: Fix NULL pointer exception in dwc3_pci_remove()
Date
4.19-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>

commit 7b412b04a0c7000293008231ce8413056abb1982 upstream.

In dwc3_pci_quirks() function, gpiod lookup table is only registered for
baytrail SOC. But in dwc3_pci_remove(), we try to unregistered it
without any checks. This leads to NULL pointer de-reference exception in
gpiod_remove_lookup_table() when unloading the module for non baytrail
SOCs. This patch fixes this issue.

Fixes: 5741022cbdf3 ("usb: dwc3: pci: Add GPIO lookup table on platforms
without ACPI GPIO resources")
Cc: <stable@vger.kernel.org>
Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/usb/dwc3/dwc3-pci.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/usb/dwc3/dwc3-pci.c
+++ b/drivers/usb/dwc3/dwc3-pci.c
@@ -283,8 +283,10 @@ err:
static void dwc3_pci_remove(struct pci_dev *pci)
{
struct dwc3_pci *dwc = pci_get_drvdata(pci);
+ struct pci_dev *pdev = dwc->pci;

- gpiod_remove_lookup_table(&platform_bytcr_gpios);
+ if (pdev->device == PCI_DEVICE_ID_INTEL_BYT)
+ gpiod_remove_lookup_table(&platform_bytcr_gpios);
#ifdef CONFIG_PM
cancel_work_sync(&dwc->wakeup_work);
#endif

\
 
 \ /
  Last update: 2018-11-29 15:41    [W:0.319 / U:4.960 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site