Piteball
/
android_kernel_samsung_msm8976
mirror of https://github.com/team-infusion-developers/android_kernel_samsung_msm8976.git
1
1
Fork 0
Code Issues Projects Releases Wiki Activity

rps: Handle double list_add at __napi_schedule 

When enqueue_to_backlog() fails to check NAPI_STATE_SCHED state,
an ipi will be triggered adding the backlog queue to the list
while a packet added by RPS onto the core could add a new packet
which would add the NAPI backlog struct to the backlog queue.

Fix this race for double addition to list.

Change-Id: Ib9d088113622eb1638aacfb0bfb43c8258b6c55e
Acked-by: Sharat Masetty <smasetty@qti.qualcomm.com>
Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>
This commit is contained in:
Subash Abhinov Kasiviswanathan 2015-06-12 12:22:29 -06:00
parent 02d2dcb23f
commit ee2f1bdbef
1 changed files with 2 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
net/core/dev.c
View File

@ -3077,7 +3077,8 @@ static void rps_trigger_softirq(void *data)
{
struct softnet_data *sd = data;
____napi_schedule(sd, &sd->backlog);
if (!test_bit(NAPI_STATE_SCHED, &sd->backlog.state))
____napi_schedule(sd, &sd->backlog);
sd->received_rps++;
}