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mei: me: avoid link reset on shutdown

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Avoid lingering reset thread on driver shutdown.
If the firmware is down during a shutdown flow
do not initiate the link reset, simply disconnect
all clients and let shutdown flow finish

Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Link: https://lore.kernel.org/r/20220215080438.264876-2-tomas.winkler@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alexander Usyskin 2022-02-15 10:04:36 +02:00 committed by Greg Kroah-Hartman
parent ccdf6f806f
commit 685867f40c
2 changed files with 6 additions and 1 deletions
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1
drivers/misc/mei/client.c
View File

@ -2148,6 +2148,7 @@ void mei_cl_all_disconnect(struct mei_device *dev)
list_for_each_entry(cl, &dev->file_list, link) list_for_each_entry(cl, &dev->file_list, link)
mei_cl_set_disconnected(cl); mei_cl_set_disconnected(cl);
} }
EXPORT_SYMBOL_GPL(mei_cl_all_disconnect);
static struct mei_cl *mei_cl_dma_map_find(struct mei_device *dev, u8 buffer_id) static struct mei_cl *mei_cl_dma_map_find(struct mei_device *dev, u8 buffer_id)
{ {

6
drivers/misc/mei/hw-me.c
View File

@ -1257,7 +1257,11 @@ irqreturn_t mei_me_irq_thread_handler(int irq, void *dev_id)
/* check if ME wants a reset */ /* check if ME wants a reset */
if (!mei_hw_is_ready(dev) && dev->dev_state != MEI_DEV_RESETTING) { if (!mei_hw_is_ready(dev) && dev->dev_state != MEI_DEV_RESETTING) {
dev_warn(dev->dev, "FW not ready: resetting.\n"); dev_warn(dev->dev, "FW not ready: resetting.\n");
schedule_work(&dev->reset_work); if (dev->dev_state == MEI_DEV_POWERING_DOWN ||
dev->dev_state == MEI_DEV_POWER_DOWN)
mei_cl_all_disconnect(dev);
else if (dev->dev_state != MEI_DEV_DISABLED)
schedule_work(&dev->reset_work);
goto end; goto end;
} }