linux-kernel - [PATCH 4.19 045/131] usb: host: xhci-mtk: avoid runtime suspend when removing hcd

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20200629153502.2494656-46-sashal@kernel.org>
Date:   Mon, 29 Jun 2020 11:33:36 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Macpaul Lin <macpaul.lin@...iatek.com>,
        Chunfeng Yun <chunfeng.yun@...iatek.com>,
        Mathias Nyman <mathias.nyman@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: [PATCH 4.19 045/131] usb: host: xhci-mtk: avoid runtime suspend when removing hcd

From: Macpaul Lin <macpaul.lin@...iatek.com>

commit a24d5072e87457a14023ee1dd3fc8b1e76f899ef upstream.

When runtime suspend was enabled, runtime suspend might happen
when xhci is removing hcd. This might cause kernel panic when hcd
has been freed but runtime pm suspend related handle need to
reference it.

Signed-off-by: Macpaul Lin <macpaul.lin@...iatek.com>
Reviewed-by: Chunfeng Yun <chunfeng.yun@...iatek.com>
Cc: stable@...r.kernel.org
Signed-off-by: Mathias Nyman <mathias.nyman@...ux.intel.com>
Link: https://lore.kernel.org/r/20200624135949.22611-4-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/usb/host/xhci-mtk.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/host/xhci-mtk.c b/drivers/usb/host/xhci-mtk.c
index 60987c787e44f..2c3b31109e168 100644
--- a/drivers/usb/host/xhci-mtk.c
+++ b/drivers/usb/host/xhci-mtk.c
@@ -592,6 +592,9 @@ static int xhci_mtk_remove(struct platform_device *dev)
 	struct xhci_hcd	*xhci = hcd_to_xhci(hcd);
 	struct usb_hcd  *shared_hcd = xhci->shared_hcd;
 
+	pm_runtime_put_noidle(&dev->dev);
+	pm_runtime_disable(&dev->dev);
+
 	usb_remove_hcd(shared_hcd);
 	xhci->shared_hcd = NULL;
 	device_init_wakeup(&dev->dev, false);
@@ -602,8 +605,6 @@ static int xhci_mtk_remove(struct platform_device *dev)
 	xhci_mtk_sch_exit(mtk);
 	xhci_mtk_clks_disable(mtk);
 	xhci_mtk_ldos_disable(mtk);
-	pm_runtime_put_sync(&dev->dev);
-	pm_runtime_disable(&dev->dev);
 
 	return 0;
 }
-- 
2.25.1