Re: Resend [PATCH] hidp: Make hidp_get_raw_report abort if the session is terminating

From: Karl Relton <redacted>

After linux 3.2 the hid_destroy_device call in hidp_session cleaning up
invokes a hook to the power_supply code which in turn tries to read the
battery capacity. This read will trigger a call to hidp_get_raw_report
which is bound to fail because the device is being taken away - so rather
than wait for the 5 second timeout failure this change enables it to fail
straight away.

Signed-off-by: Karl Relton <redacted>
---
 net/bluetooth/hidp/core.c |    7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/net/bluetooth/hidp/core.c b/net/bluetooth/hidp/core.c
index b2bcbe2..a4c1bb0 100644
--- a/net/bluetooth/hidp/core.c
+++ b/net/bluetooth/hidp/core.c

@@ -311,6 +311,9 @@ static int hidp_get_raw_report(struct hid_device *hid,
        int numbered_reports = hid->report_enum[report_type].numbered;
        int ret;

+       if (atomic_read(&session->terminate))
+               return -EIO;
+
        switch (report_type) {
        case HID_FEATURE_REPORT:
                report_type = HIDP_TRANS_GET_REPORT | HIDP_DATA_RTYPE_FEATURE;

@@ -695,8 +698,10 @@ static int hidp_session(void *arg)
        set_current_state(TASK_INTERRUPTIBLE);
        while (!atomic_read(&session->terminate)) {
                if (ctrl_sk->sk_state != BT_CONNECTED ||
-                               intr_sk->sk_state != BT_CONNECTED)
+                               intr_sk->sk_state != BT_CONNECTED) {
+                       atomic_inc(&session->terminate);