diff options
| author | Marcel Ziswiler <marcel.ziswiler@toradex.com> | 2019-12-18 22:52:20 +0100 |
|---|---|---|
| committer | Marcel Ziswiler <marcel.ziswiler@toradex.com> | 2019-12-18 22:52:20 +0100 |
| commit | 1ddf624b0b268fdc0b80b1de618b98f8d117afea (patch) | |
| tree | 3d3218332bcb34cb0afa01d6ad996058a3dbcb77 /drivers/hid/usbhid/hiddev.c | |
| parent | 6b774eec1f9d3064e9b33634dfa99d5666d0a73a (diff) | |
| parent | bfb9e5c03076a446b1f4f6a523ddc8d723c907a6 (diff) | |
Merge tag 'v4.14.159' into 4.14-2.0.x-imx
This is the 4.14.159 stable release
Conflicts:
arch/arm/Kconfig.debug
arch/arm/boot/dts/imx7s.dtsi
arch/arm/mach-imx/cpuidle-imx6sx.c
drivers/crypto/caam/caamalg.c
drivers/crypto/mxs-dcp.c
drivers/dma/imx-sdma.c
drivers/input/keyboard/imx_keypad.c
drivers/net/can/flexcan.c
drivers/net/can/rx-offload.c
drivers/net/wireless/ath/ath10k/pci.c
drivers/pci/dwc/pci-imx6.c
drivers/spi/spi-fsl-lpspi.c
drivers/usb/dwc3/gadget.c
Diffstat (limited to 'drivers/hid/usbhid/hiddev.c')
| -rw-r--r-- | drivers/hid/usbhid/hiddev.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/hid/usbhid/hiddev.c b/drivers/hid/usbhid/hiddev.c index 89761551c15d..ce342fd0457e 100644 --- a/drivers/hid/usbhid/hiddev.c +++ b/drivers/hid/usbhid/hiddev.c @@ -297,6 +297,14 @@ static int hiddev_open(struct inode *inode, struct file *file) spin_unlock_irq(&list->hiddev->list_lock); mutex_lock(&hiddev->existancelock); + /* + * recheck exist with existance lock held to + * avoid opening a disconnected device + */ + if (!list->hiddev->exist) { + res = -ENODEV; + goto bail_unlock; + } if (!list->hiddev->open++) if (list->hiddev->exist) { struct hid_device *hid = hiddev->hid; @@ -313,6 +321,10 @@ bail_normal_power: hid_hw_power(hid, PM_HINT_NORMAL); bail_unlock: mutex_unlock(&hiddev->existancelock); + + spin_lock_irq(&list->hiddev->list_lock); + list_del(&list->node); + spin_unlock_irq(&list->hiddev->list_lock); bail: file->private_data = NULL; vfree(list); |