lisa/android_kernel_xiaomi_sm8350
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

qcacld-3.0: Print drv ops inactive thread call stack

Browse Source 
As part of the wlan driver handlers for kernel ndo events, an inactivity
timer (effectively a watchdog timer) is started. This allows us to catch
instances where drvier operations take much longer than expected. In
cases where this inactivity timer expires, print the stack trace of the
inactive thread to expedite debugging efforts.

Change-Id: I4427207a5cd7d232486ce453555765f7e0f4fe17
CRs-Fixed: 2160837
This commit is contained in:
Dustin Brown 2017-12-18 12:00:13 -08:00 committed by snandini
parent 4fea99d090
commit 45ed4bbeaa
1 changed files with 9 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
core/hdd/src/wlan_hdd_main.c
View File

@ -183,6 +183,7 @@ static struct attribute *attrs[] = {
#define MAX_OPS_NAME_STRING_SIZE 20
static qdf_timer_t hdd_drv_ops_inactivity_timer;
static struct task_struct *hdd_drv_ops_task;
static char drv_ops_string[MAX_OPS_NAME_STRING_SIZE];
/* the Android framework expects this param even though we don't use it */
@ -13215,6 +13216,7 @@ void hdd_start_driver_ops_timer(int drv_op)
break;
}
hdd_drv_ops_task = current;
qdf_timer_start(&hdd_drv_ops_inactivity_timer,
HDD_OPS_INACTIVITY_TIMEOUT);
}
@ -13240,6 +13242,13 @@ void hdd_drv_ops_inactivity_handler(void)
hdd_err("%s: %d Sec timer expired while in .%s",
__func__, HDD_OPS_INACTIVITY_TIMEOUT/1000, drv_ops_string);
if (hdd_drv_ops_task) {
printk("Call stack for \"%s\"\n", hdd_drv_ops_task->comm);
qdf_print_thread_trace(hdd_drv_ops_task);
} else {
hdd_err("hdd_drv_ops_task is null");
}
/* Driver shutdown is stuck, no recovery possible at this point */
if (0 == qdf_mem_cmp(&drv_ops_string[0], "shutdown",
sizeof("shutdown")))