Commit 092563604217 ("HID: rmi: Disable scanning if the device is not a
wake source") introduced a regression for devices which use hid-rmi to
handle composite USB devices. The suspend or resume callbacks are not
checking that the device is a RMI device before calling rmi_read or
rmi_write. This results in dereferencing uninitialized variables on
non RMI devices. This patch checks that the RMI_DEVICE flag is set before
sending RMI commands to the device.
Reported-by: Rodrigo Gomes <rodrigo.toste.gomes@xxxxxxxxx>
Signed-off-by: Andrew Duggan <aduggan@xxxxxxxxxxxxx>
---
drivers/hid/hid-rmi.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/hid/hid-rmi.c b/drivers/hid/hid-rmi.c
index 67cd059..9cd2ca3 100644
--- a/drivers/hid/hid-rmi.c
+++ b/drivers/hid/hid-rmi.c
@@ -594,6 +594,9 @@ static int rmi_suspend(struct hid_device *hdev, pm_message_t message)
int ret;
u8 buf[RMI_F11_CTRL_REG_COUNT];
+ if (!(data->device_flags & RMI_DEVICE))
+ return 0;
+
ret = rmi_read_block(hdev, data->f11.control_base_addr, buf,
RMI_F11_CTRL_REG_COUNT);
if (ret)
@@ -613,6 +616,9 @@ static int rmi_post_reset(struct hid_device *hdev)
struct rmi_data *data = hid_get_drvdata(hdev);
int ret;
+ if (!(data->device_flags & RMI_DEVICE))
+ return 0;
+
ret = rmi_reset_attn_mode(hdev);
if (ret) {
hid_err(hdev, "can not set rmi mode\n");
@@ -640,6 +646,11 @@ static int rmi_post_reset(struct hid_device *hdev)
static int rmi_post_resume(struct hid_device *hdev)
{
+ struct rmi_data *data = hid_get_drvdata(hdev);
+
+ if (!(data->device_flags & RMI_DEVICE))
+ return 0;
+
return rmi_reset_attn_mode(hdev);
}
#endif /* CONFIG_PM */
--
2.5.0
--
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