This is a note to let you know that I've just added the patch titled
xhci: hisilicon: fix refercence leak in xhci_histb_probe
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
xhci-hisilicon-fix-refercence-leak-in-xhci_histb_probe.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 76255470ffa2795a44032e8b3c1ced11d81aa2db Mon Sep 17 00:00:00 2001
From: Zhang Qilong <zhangqilong3@xxxxxxxxxx>
Date: Fri, 6 Nov 2020 20:22:21 +0800
Subject: xhci: hisilicon: fix refercence leak in xhci_histb_probe
From: Zhang Qilong <zhangqilong3@xxxxxxxxxx>
commit 76255470ffa2795a44032e8b3c1ced11d81aa2db upstream.
pm_runtime_get_sync() will increment pm usage at first and it
will resume the device later. We should decrease the usage count
whetever it succeeded or failed(maybe runtime of the device has
error, or device is in inaccessible state, or other error state).
If we do not call put operation to decrease the reference, it will
result in reference leak in xhci_histb_probe. Moreover, this
device cannot enter the idle state and always stay busy or other
non-idle state later. So we fixed it by jumping to error handling
branch.
Fixes: c508f41da0788 ("xhci: hisilicon: support HiSilicon STB xHCI host controller")
Signed-off-by: Zhang Qilong <zhangqilong3@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20201106122221.2304528-1-zhangqilong3@xxxxxxxxxx
Cc: stable <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/host/xhci-histb.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/usb/host/xhci-histb.c
+++ b/drivers/usb/host/xhci-histb.c
@@ -241,7 +241,7 @@ static int xhci_histb_probe(struct platf
/* Initialize dma_mask and coherent_dma_mask to 32-bits */
ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
if (ret)
- return ret;
+ goto disable_pm;
hcd = usb_create_hcd(driver, dev, dev_name(dev));
if (!hcd) {
Patches currently in stable-queue which might be from zhangqilong3@xxxxxxxxxx are
queue-5.4/vfio-platform-fix-reference-leak-in-vfio_platform_op.patch
queue-5.4/xhci-hisilicon-fix-refercence-leak-in-xhci_histb_probe.patch
