mei: exclude device from suspend direct complete optimization

MEI device performs link reset during system suspend sequence.
The link reset cannot be performed while device is in
runtime suspend state. The resume sequence is bypassed with
suspend direct complete optimization,so the optimization should be
disabled for mei devices.

Fixes:
 [  192.940537] Restarting tasks ...
 [  192.940610] PGI is not set
 [  192.940619] ------------[ cut here ]------------ [  192.940623]
 WARNING: CPU: 0
 me.c:653 mei_me_pg_exit_sync+0x351/0x360 [  192.940624] Modules
 linked
 in:
 [  192.940627] CPU: 0 PID: 1661 Comm: kworker/0:3 Not tainted
 4.13.0-rc2+
 #2 [  192.940628] Hardware name: Dell Inc. XPS 13 9343/0TM99H, BIOS
 A11
 12/08/2016 [  192.940630] Workqueue: pm pm_runtime_work <snip> [
 192.940642] Call Trace:
 [  192.940646]  ? pci_pme_active+0x1de/0x1f0 [  192.940649]  ?
 pci_restore_standard_config+0x50/0x50
 [  192.940651]  ? kfree+0x172/0x190
 [  192.940653]  ? kfree+0x172/0x190
 [  192.940655]  ? pci_restore_standard_config+0x50/0x50
 [  192.940663]  mei_me_pm_runtime_resume+0x3f/0xc0
 [  192.940665]  pci_pm_runtime_resume+0x7a/0xa0 [  192.940667]
 __rpm_callback+0xb9/0x1e0 [  192.940668]  ?
 preempt_count_add+0x6d/0xc0 [  192.940670]  rpm_callback+0x24/0x90 [
 192.940672]  ? pci_restore_standard_config+0x50/0x50
 [  192.940674]  rpm_resume+0x4e8/0x800 [  192.940676]
 pm_runtime_work+0x55/0xb0 [  192.940678]
 process_one_work+0x184/0x3e0 [  192.940680]
 worker_thread+0x4d/0x3a0 [ 192.940681]  ?
 preempt_count_sub+0x9b/0x100 [  192.940683]
 kthread+0x122/0x140 [  192.940684]  ? process_one_work+0x3e0/0x3e0 [
 192.940685]  ? __kthread_create_on_node+0x1a0/0x1a0
 [  192.940688]  ret_from_fork+0x27/0x40 [  192.940690] Code: 96 3a
 9e ff 48 8b 7d 98 e8 cd 21 58 00 83 bb bc 01 00 00
 04 0f 85 40 fe ff ff e9 41 fe ff ff 48 c7 c7 5f 04 99 96 e8 93 6b 9f
 ff <0f> ff e9 5d fd ff ff e8 33 fe 99 ff 0f 1f 00 0f 1f 44 00 00 55
 [  192.940719] ---[ end trace
 a86955597774ead8 ]--- [  192.942540] done.

Suggested-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reported-by: Dominik Brodowski <linux@dominikbrodowski.net>
Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/misc/mei/pci-me.c b/drivers/misc/mei/pci-me.c
index 8621a198a2ce3eae317e4007cd6c533b56cfecc4..bac33311f55a6d7a6699b362c39730fae9c4f107 100644 (file)
--- a/drivers/misc/mei/pci-me.c
+++ b/drivers/misc/mei/pci-me.c
@@ -215,6 +215,12 @@ static int mei_me_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 
        pci_set_drvdata(pdev, dev);
 
+       /*
+        * MEI requires to resume from runtime suspend mode
+        * in order to perform link reset flow upon system suspend.
+        */
+       pdev->dev_flags |= PCI_DEV_FLAGS_NEEDS_RESUME;
+
        /*
        * For not wake-able HW runtime pm framework
        * can't be used on pci device level.

diff --git a/drivers/misc/mei/pci-txe.c b/drivers/misc/mei/pci-txe.c
index f811cd52446852beecfedf02b7100f4bb6789169..e38a5f144373451fc87007ffc1cf4292059c5408 100644 (file)
--- a/drivers/misc/mei/pci-txe.c
+++ b/drivers/misc/mei/pci-txe.c
@@ -137,6 +137,12 @@ static int mei_txe_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 
        pci_set_drvdata(pdev, dev);
 
+       /*
+        * MEI requires to resume from runtime suspend mode
+        * in order to perform link reset flow upon system suspend.
+        */
+       pdev->dev_flags |= PCI_DEV_FLAGS_NEEDS_RESUME;
+
        /*
        * For not wake-able HW runtime pm framework
        * can't be used on pci device level.