Hello.
On 08/22/2013 08:38 PM, Rupesh Gujare wrote:
Currently we call oz_pd_destroy() from softirq context, where we
try to destroy relevant data structures, as well we kill a tasklet
which always result in following kernel warning.
[12279.262194] Attempt to kill tasklet from interrupt
[12279.262202] Attempt to kill tasklet from interrupt
This patch defers deallocation of data structures to work queue.
Signed-off-by: Rupesh Gujare <rupesh.gujare@xxxxxxxxx>
---
drivers/staging/ozwpan/ozpd.c | 28 +++++++++++++++++++++++-----
drivers/staging/ozwpan/ozpd.h | 1 +
2 files changed, 24 insertions(+), 5 deletions(-)
diff --git a/drivers/staging/ozwpan/ozpd.c b/drivers/staging/ozwpan/ozpd.c
index 2514d79..06004c8 100644
--- a/drivers/staging/ozwpan/ozpd.c
+++ b/drivers/staging/ozwpan/ozpd.c
[...]
@@ -259,6 +257,26 @@ void oz_pd_destroy(struct oz_pd *pd)
}
/*------------------------------------------------------------------------------
+ * Context: softirq or Process
+ */
+void oz_pd_destroy(struct oz_pd *pd)
+{
+ int ret;
+
+ if (hrtimer_active(&pd->timeout))
+ hrtimer_cancel(&pd->timeout);
+ if (hrtimer_active(&pd->heartbeat))
+ hrtimer_cancel(&pd->heartbeat);
+
+ memset(&pd->workitem, 0, sizeof(pd->workitem));
+ INIT_WORK(&pd->workitem, oz_pd_free);
Hm, memset(), then INIT_WORK()? Is memset() necessary?
+ ret = schedule_work(&pd->workitem);
+
Don't think empty line is needed here.
+ if (ret)
+ oz_pd_dbg(pd, ON, "failed to schedule workitem\n");
+}
+
+/*------------------------------------------------------------------------------
* Context: softirq-serialized
*/
int oz_services_start(struct oz_pd *pd, u16 apps, int resume)
diff --git a/drivers/staging/ozwpan/ozpd.h b/drivers/staging/ozwpan/ozpd.h
index 996ef65..12c7129 100644
--- a/drivers/staging/ozwpan/ozpd.h
+++ b/drivers/staging/ozwpan/ozpd.h
@@ -99,6 +99,7 @@ struct oz_pd {
u8 timeout_type;
struct tasklet_struct heartbeat_tasklet;
struct tasklet_struct timeout_tasklet;
+ struct work_struct workitem;
Er, other field names seem aligned, what about this one?
};
WBR, Sergei
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