Merge tag 'v3.18.22' of git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable into linux-linaro-lsk-v3.18

Linux 3.18.22

* tag 'v3.18.22' of git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable: (178 commits)
  Linux 3.18.22
  net: call rcu_read_lock early in process_backlog
  lpfc: Fix scsi prep dma buf error.
  rds: fix an integer overflow test in rds_info_getsockopt()
  net/mlx4_core: Fix wrong index in propagating port change event to VFs
  netlink: don't hold mutex in rcu callback when releasing mmapd ring
  inet: frags: fix defragmented packet's IP header for af_packet
  bonding: correct the MAC address for "follow" fail_over_mac policy
  bonding: fix destruction of bond with devices different from arphrd_ether
  ipv6: lock socket in ip6_datagram_connect()
  isdn/gigaset: reset tty->receive_room when attaching ser_gigaset
  bridge: mdb: fix double add notification
  net: Fix skb csum races when peeking
  net: do not process device backlog during unregistration
  net: pktgen: fix race between pktgen_thread_worker() and kthread_stop()
  bridge: mdb: zero out the local br_ip variable before use
  net/tipc: initialize security state for new connection socket
  ip_tunnel: fix ipv4 pmtu check to honor inner ip header df
  net: graceful exit from netif_alloc_netdev_queues()
  ipv6: Make MLD packets to only be processed locally
  ...

1 files changed, 24 insertions, 0 deletions

diff --git a/drivers/ata/libata-transport.c b/drivers/ata/libata-transport.c
index e37413228228..fd29b7224082 100644
--- a/drivers/ata/libata-transport.c
+++ b/drivers/ata/libata-transport.c
@@ -559,6 +559,29 @@ show_ata_dev_gscr(struct device *dev,
 
 static DEVICE_ATTR(gscr, S_IRUGO, show_ata_dev_gscr, NULL);
 
+static ssize_t
+show_ata_dev_trim(struct device *dev,
+		  struct device_attribute *attr, char *buf)
+{
+	struct ata_device *ata_dev = transport_class_to_dev(dev);
+	unsigned char *mode;
+
+	if (!ata_id_has_trim(ata_dev->id))
+		mode = "unsupported";
+	else if (ata_dev->horkage & ATA_HORKAGE_NOTRIM)
+		mode = "forced_unsupported";
+	else if (ata_dev->horkage & ATA_HORKAGE_NO_NCQ_TRIM)
+			mode = "forced_unqueued";
+	else if (ata_fpdma_dsm_supported(ata_dev))
+		mode = "queued";
+	else
+		mode = "unqueued";
+
+	return snprintf(buf, 20, "%s\n", mode);
+}
+
+static DEVICE_ATTR(trim, S_IRUGO, show_ata_dev_trim, NULL);
+
 static DECLARE_TRANSPORT_CLASS(ata_dev_class,
 			       "ata_device", NULL, NULL, NULL);
 
@@ -732,6 +755,7 @@ struct scsi_transport_template *ata_attach_transport(void)
 	SETUP_DEV_ATTRIBUTE(ering);
 	SETUP_DEV_ATTRIBUTE(id);
 	SETUP_DEV_ATTRIBUTE(gscr);
+	SETUP_DEV_ATTRIBUTE(trim);
 	BUG_ON(count > ATA_DEV_ATTRS);
 	i->dev_attrs[count] = NULL;