Merge 4.4.159 into android-4.4

Changes in 4.4.159
	NFC: Fix possible memory corruption when handling SHDLC I-Frame commands
	NFC: Fix the number of pipes
	ASoC: cs4265: fix MMTLR Data switch control
	ALSA: bebob: use address returned by kmalloc() instead of kernel stack for streaming DMA mapping
	ALSA: emu10k1: fix possible info leak to userspace on SNDRV_EMU10K1_IOCTL_INFO
	platform/x86: alienware-wmi: Correct a memory leak
	xen/netfront: don't bug in case of too many frags
	xen/x86/vpmu: Zero struct pt_regs before calling into sample handling code
	ring-buffer: Allow for rescheduling when removing pages
	mm: shmem.c: Correctly annotate new inodes for lockdep
	gso_segment: Reset skb->mac_len after modifying network header
	ipv6: fix possible use-after-free in ip6_xmit()
	net/appletalk: fix minor pointer leak to userspace in SIOCFINDIPDDPRT
	net: hp100: fix always-true check for link up state
	neighbour: confirm neigh entries when ARP packet is received
	scsi: target: iscsi: Use hex2bin instead of a re-implementation
	ocfs2: fix ocfs2 read block panic
	drm/nouveau/drm/nouveau: Use pm_runtime_get_noresume() in connector_detect()
	tty: vt_ioctl: fix potential Spectre v1
	ext4: avoid divide by zero fault when deleting corrupted inline directories
	ext4: recalucate superblock checksum after updating free blocks/inodes
	ext4: fix online resize's handling of a too-small final block group
	ext4: fix online resizing for bigalloc file systems with a 1k block size
	ext4: don't mark mmp buffer head dirty
	arm64: Add trace_hardirqs_off annotation in ret_to_user
	HID: sony: Update device ids
	HID: sony: Support DS4 dongle
	iw_cxgb4: only allow 1 flush on user qps
	Linux 4.4.159

Change-Id: I98239ca60783ca69147f2f11034138fc22e2af65
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

1 files changed, 11 insertions, 9 deletions

diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.c b/drivers/gpu/drm/nouveau/nouveau_connector.c
index ababdaabe870..1855b475cc0b 100644
--- a/drivers/gpu/drm/nouveau/nouveau_connector.c
+++ b/drivers/gpu/drm/nouveau/nouveau_connector.c
@@ -253,12 +253,16 @@ nouveau_connector_detect(struct drm_connector *connector, bool force)
 		nv_connector->edid = NULL;
 	}
 
-	/* Outputs are only polled while runtime active, so acquiring a
-	 * runtime PM ref here is unnecessary (and would deadlock upon
-	 * runtime suspend because it waits for polling to finish).
+	/* Outputs are only polled while runtime active, so resuming the
+	 * device here is unnecessary (and would deadlock upon runtime suspend
+	 * because it waits for polling to finish). We do however, want to
+	 * prevent the autosuspend timer from elapsing during this operation
+	 * if possible.
 	 */
-	if (!drm_kms_helper_is_poll_worker()) {
-		ret = pm_runtime_get_sync(connector->dev->dev);
+	if (drm_kms_helper_is_poll_worker()) {
+		pm_runtime_get_noresume(dev->dev);
+	} else {
+		ret = pm_runtime_get_sync(dev->dev);
 		if (ret < 0 && ret != -EACCES)
 			return conn_status;
 	}
@@ -329,10 +333,8 @@ detect_analog:
 
  out:
 
-	if (!drm_kms_helper_is_poll_worker()) {
-		pm_runtime_mark_last_busy(connector->dev->dev);
-		pm_runtime_put_autosuspend(connector->dev->dev);
-	}
+	pm_runtime_mark_last_busy(dev->dev);
+	pm_runtime_put_autosuspend(dev->dev);
 
 	return conn_status;
 }