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mei: use hbm idle state to prevent spurious resets

Forráskód böngészése 
When reset is caused by hbm protocol mismatch or timeout
we might end up in an endless reset loop and hbm protocol
will never sync

Cc: <stable@vger.kernel.org>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tomas Winkler
2014-01-08 20:19:22 +02:00
committed by Greg Kroah-Hartman
szülő 544f946014
commit 66ae460b13
4 fájl változott, egészen pontosan 43 új sor hozzáadva és 14 régi sor törölve
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25
drivers/misc/mei/interrupt.c
Fájl megtekintése

@@ -537,7 +537,6 @@ EXPORT_SYMBOL_GPL(mei_irq_write_handler);
*
* @work: pointer to the work_struct structure
*
* NOTE: This function is called by timer interrupt work
*/
void mei_timer(struct work_struct *work)
{
@@ -552,18 +551,24 @@ void mei_timer(struct work_struct *work)
mutex_lock(&dev->device_lock);
if (dev->dev_state != MEI_DEV_ENABLED) {
if (dev->dev_state == MEI_DEV_INIT_CLIENTS) {
if (dev->init_clients_timer) {
if (--dev->init_clients_timer == 0) {
dev_err(&dev->pdev->dev, "reset: init clients timeout hbm_state = %d.\n",
dev->hbm_state);
mei_reset(dev, 1);
}
/* Catch interrupt stalls during HBM init handshake */
if (dev->dev_state == MEI_DEV_INIT_CLIENTS &&
dev->hbm_state != MEI_HBM_IDLE) {
if (dev->init_clients_timer) {
if (--dev->init_clients_timer == 0) {
dev_err(&dev->pdev->dev, "timer: init clients timeout hbm_state = %d.\n",
dev->hbm_state);
mei_reset(dev, 1);
goto out;
}
}
goto out;
}
if (dev->dev_state != MEI_DEV_ENABLED)
goto out;
/*** connect/disconnect timeouts ***/
list_for_each_entry_safe(cl_pos, cl_next, &dev->file_list, link) {
if (cl_pos->timer_count) {