diff --git a/Makefile b/Makefile
index 0e7874951ac5..f1aeb98f9ace 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 VERSION = 4
 PATCHLEVEL = 9
-SUBLEVEL = 150
+SUBLEVEL = 151
 EXTRAVERSION =
 NAME = Roaring Lionus
 
diff --git a/drivers/acpi/power.c b/drivers/acpi/power.c
index 3a6c9b741b23..4f4c34892086 100644
--- a/drivers/acpi/power.c
+++ b/drivers/acpi/power.c
@@ -131,6 +131,23 @@ void acpi_power_resources_list_free(struct list_head *list)
        }
 }
 
+static bool acpi_power_resource_is_dup(union acpi_object *package,
+                                      unsigned int start, unsigned int i)
+{
+       acpi_handle rhandle, dup;
+       unsigned int j;
+
+       /* The caller is expected to check the package element types */
+       rhandle = package->package.elements[i].reference.handle;
+       for (j = start; j < i; j++) {
+               dup = package->package.elements[j].reference.handle;
+               if (dup == rhandle)
+                       return true;
+       }
+
+       return false;
+}
+
 int acpi_extract_power_resources(union acpi_object *package, unsigned int 
start,
                                 struct list_head *list)
 {
@@ -150,6 +167,11 @@ int acpi_extract_power_resources(union acpi_object 
*package, unsigned int start,
                        err = -ENODEV;
                        break;
                }
+
+               /* Some ACPI tables contain duplicate power resource references 
*/
+               if (acpi_power_resource_is_dup(package, start, i))
+                       continue;
+
                err = acpi_add_power_resource(rhandle);
                if (err)
                        break;
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index ef3016a467a0..8a93ca4d6840 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -6346,7 +6346,6 @@ static ssize_t do_rbd_remove(struct bus_type *bus,
        struct list_head *tmp;
        int dev_id;
        char opt_buf[6];
-       bool already = false;
        bool force = false;
        int ret;
 
@@ -6379,13 +6378,13 @@ static ssize_t do_rbd_remove(struct bus_type *bus,
                spin_lock_irq(&rbd_dev->lock);
                if (rbd_dev->open_count && !force)
                        ret = -EBUSY;
-               else
-                       already = test_and_set_bit(RBD_DEV_FLAG_REMOVING,
-                                                       &rbd_dev->flags);
+               else if (test_and_set_bit(RBD_DEV_FLAG_REMOVING,
+                                         &rbd_dev->flags))
+                       ret = -EINPROGRESS;
                spin_unlock_irq(&rbd_dev->lock);
        }
        spin_unlock(&rbd_dev_list_lock);
-       if (ret < 0 || already)
+       if (ret)
                return ret;
 
        if (force) {
diff --git a/drivers/i2c/i2c-dev.c b/drivers/i2c/i2c-dev.c
index 6f638bbc922d..00e8e675cbeb 100644
--- a/drivers/i2c/i2c-dev.c
+++ b/drivers/i2c/i2c-dev.c
@@ -461,9 +461,15 @@ static long i2cdev_ioctl(struct file *file, unsigned int 
cmd, unsigned long arg)
                return i2cdev_ioctl_smbus(client, arg);
 
        case I2C_RETRIES:
+               if (arg > INT_MAX)
+                       return -EINVAL;
+
                client->adapter->retries = arg;
                break;
        case I2C_TIMEOUT:
+               if (arg > INT_MAX)
+                       return -EINVAL;
+
                /* For historical reasons, user-space sets the timeout
                 * value in units of 10 ms.
                 */
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index 6c0bb38c4089..8d4d46f3fd16 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -1828,6 +1828,13 @@ static const struct usb_device_id acm_ids[] = {
        .driver_info = IGNORE_DEVICE,
        },
 
+       { USB_DEVICE(0x1bc7, 0x0021), /* Telit 3G ACM only composition */
+       .driver_info = SEND_ZERO_PACKET,
+       },
+       { USB_DEVICE(0x1bc7, 0x0023), /* Telit 3G ACM + ECM composition */
+       .driver_info = SEND_ZERO_PACKET,
+       },
+
        /* control interfaces without any protocol set */
        { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
                USB_CDC_PROTO_NONE) },
diff --git a/drivers/usb/core/quirks.c b/drivers/usb/core/quirks.c
index cf378b1ed373..733479ddf8a7 100644
--- a/drivers/usb/core/quirks.c
+++ b/drivers/usb/core/quirks.c
@@ -240,7 +240,8 @@ static const struct usb_device_id usb_quirk_list[] = {
                        USB_QUIRK_LINEAR_UFRAME_INTR_BINTERVAL },
 
        /* Corsair K70 RGB */
-       { USB_DEVICE(0x1b1c, 0x1b13), .driver_info = USB_QUIRK_DELAY_INIT },
+       { USB_DEVICE(0x1b1c, 0x1b13), .driver_info = USB_QUIRK_DELAY_INIT |
+         USB_QUIRK_DELAY_CTRL_MSG },
 
        /* Corsair Strafe */
        { USB_DEVICE(0x1b1c, 0x1b15), .driver_info = USB_QUIRK_DELAY_INIT |
diff --git a/drivers/usb/storage/scsiglue.c b/drivers/usb/storage/scsiglue.c
index 344ec8631481..13f2c051dbf2 100644
--- a/drivers/usb/storage/scsiglue.c
+++ b/drivers/usb/storage/scsiglue.c
@@ -251,8 +251,12 @@ static int slave_configure(struct scsi_device *sdev)
                if (!(us->fflags & US_FL_NEEDS_CAP16))
                        sdev->try_rc_10_first = 1;
 
-               /* assume SPC3 or latter devices support sense size > 18 */
-               if (sdev->scsi_level > SCSI_SPC_2)
+               /*
+                * assume SPC3 or latter devices support sense size > 18
+                * unless US_FL_BAD_SENSE quirk is specified.
+                */
+               if (sdev->scsi_level > SCSI_SPC_2 &&
+                   !(us->fflags & US_FL_BAD_SENSE))
                        us->fflags |= US_FL_SANE_SENSE;
 
                /*
diff --git a/drivers/usb/storage/unusual_devs.h 
b/drivers/usb/storage/unusual_devs.h
index 0a86b3f3638e..c802aabcc58c 100644
--- a/drivers/usb/storage/unusual_devs.h
+++ b/drivers/usb/storage/unusual_devs.h
@@ -1284,6 +1284,18 @@ UNUSUAL_DEV( 0x090c, 0x1132, 0x0000, 0xffff,
                USB_SC_DEVICE, USB_PR_DEVICE, NULL,
                US_FL_FIX_CAPACITY ),
 
+/*
+ * Reported by Icenowy Zheng <[email protected]>
+ * The SMI SM3350 USB-UFS bridge controller will enter a wrong state
+ * that do not process read/write command if a long sense is requested,
+ * so force to use 18-byte sense.
+ */
+UNUSUAL_DEV(  0x090c, 0x3350, 0x0000, 0xffff,
+               "SMI",
+               "SM3350 UFS-to-USB-Mass-Storage bridge",
+               USB_SC_DEVICE, USB_PR_DEVICE, NULL,
+               US_FL_BAD_SENSE ),
+
 /*
  * Reported by Paul Hartman <[email protected]>
  * This card reader returns "Illegal Request, Logical Block Address
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 49eeed25f200..a3046b6523c8 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -1118,10 +1118,10 @@ cifs_push_mandatory_locks(struct cifsFileInfo *cfile)
 
        /*
         * Accessing maxBuf is racy with cifs_reconnect - need to store value
-        * and check it for zero before using.
+        * and check it before using.
         */
        max_buf = tcon->ses->server->maxBuf;
-       if (!max_buf) {
+       if (max_buf < (sizeof(struct smb_hdr) + sizeof(LOCKING_ANDX_RANGE))) {
                free_xid(xid);
                return -EINVAL;
        }
@@ -1456,10 +1456,10 @@ cifs_unlock_range(struct cifsFileInfo *cfile, struct 
file_lock *flock,
 
        /*
         * Accessing maxBuf is racy with cifs_reconnect - need to store value
-        * and check it for zero before using.
+        * and check it before using.
         */
        max_buf = tcon->ses->server->maxBuf;
-       if (!max_buf)
+       if (max_buf < (sizeof(struct smb_hdr) + sizeof(LOCKING_ANDX_RANGE)))
                return -EINVAL;
 
        max_num = (max_buf - sizeof(struct smb_hdr)) /
diff --git a/fs/cifs/smb2file.c b/fs/cifs/smb2file.c
index b2aff0c6f22c..b7885dc0d9bb 100644
--- a/fs/cifs/smb2file.c
+++ b/fs/cifs/smb2file.c
@@ -123,10 +123,10 @@ smb2_unlock_range(struct cifsFileInfo *cfile, struct 
file_lock *flock,
 
        /*
         * Accessing maxBuf is racy with cifs_reconnect - need to store value
-        * and check it for zero before using.
+        * and check it before using.
         */
        max_buf = tcon->ses->server->maxBuf;
-       if (!max_buf)
+       if (max_buf < sizeof(struct smb2_lock_element))
                return -EINVAL;
 
        max_num = max_buf / sizeof(struct smb2_lock_element);
diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c
index cc26d4138d70..de133eeebc8a 100644
--- a/fs/cifs/transport.c
+++ b/fs/cifs/transport.c
@@ -301,7 +301,7 @@ smb_send_rqst(struct TCP_Server_Info *server, struct 
smb_rqst *rqst)
        if (rc < 0 && rc != -EINTR)
                cifs_dbg(VFS, "Error %d sending data on socket to server\n",
                         rc);
-       else
+       else if (rc > 0)
                rc = 0;
 
        return rc;
diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c
index 1008384d5ed5..9a13f86fed62 100644
--- a/fs/ext4/inline.c
+++ b/fs/ext4/inline.c
@@ -1859,12 +1859,12 @@ int ext4_inline_data_fiemap(struct inode *inode,
        physical += (char *)ext4_raw_inode(&iloc) - iloc.bh->b_data;
        physical += offsetof(struct ext4_inode, i_block);
 
-       if (physical)
-               error = fiemap_fill_next_extent(fieinfo, start, physical,
-                                               inline_len, flags);
        brelse(iloc.bh);
 out:
        up_read(&EXT4_I(inode)->xattr_sem);
+       if (physical)
+               error = fiemap_fill_next_extent(fieinfo, start, physical,
+                                               inline_len, flags);
        return (error < 0 ? error : 0);
 }
 
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index f62eca8cbde0..4815be26b15f 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -2698,7 +2698,8 @@ static int ext4_writepages(struct address_space *mapping,
                 * We may need to convert up to one extent per block in
                 * the page and we may dirty the inode.
                 */
-               rsv_blocks = 1 + (PAGE_SIZE >> inode->i_blkbits);
+               rsv_blocks = 1 + ext4_chunk_trans_blocks(inode,
+                                               PAGE_SIZE >> inode->i_blkbits);
        }
 
        /*
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 6810234b0b27..a6c7ace9cfd1 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -4679,7 +4679,7 @@ static int ext4_commit_super(struct super_block *sb, int 
sync)
        ext4_superblock_csum_set(sb);
        if (sync)
                lock_buffer(sbh);
-       if (buffer_write_io_error(sbh)) {
+       if (buffer_write_io_error(sbh) || !buffer_uptodate(sbh)) {
                /*
                 * Oh, dear.  A previous attempt to write the
                 * superblock failed.  This could happen because the
diff --git a/include/linux/sunrpc/svc.h b/include/linux/sunrpc/svc.h
index 102c84dcc11a..63eed9ac8fd7 100644
--- a/include/linux/sunrpc/svc.h
+++ b/include/linux/sunrpc/svc.h
@@ -291,9 +291,12 @@ struct svc_rqst {
        struct svc_cacherep *   rq_cacherep;    /* cache info */
        struct task_struct      *rq_task;       /* service thread */
        spinlock_t              rq_lock;        /* per-request lock */
+       struct net              *rq_bc_net;     /* pointer to backchannel's
+                                                * net namespace
+                                                */
 };
 
-#define SVC_NET(svc_rqst)      (svc_rqst->rq_xprt->xpt_net)
+#define SVC_NET(rqst) (rqst->rq_xprt ? rqst->rq_xprt->xpt_net : 
rqst->rq_bc_net)
 
 /*
  * Rigorous type checking on sockaddr type conversions
diff --git a/mm/slab.c b/mm/slab.c
index 263dcda6897b..354a09deecff 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -682,8 +682,10 @@ static struct alien_cache *__alloc_alien_cache(int node, 
int entries,
        struct alien_cache *alc = NULL;
 
        alc = kmalloc_node(memsize, gfp, node);
-       init_arraycache(&alc->ac, entries, batch);
-       spin_lock_init(&alc->lock);
+       if (alc) {
+               init_arraycache(&alc->ac, entries, batch);
+               spin_lock_init(&alc->lock);
+       }
        return alc;
 }
 
diff --git a/mm/util.c b/mm/util.c
index 8c755d05d4e6..07f467206186 100644
--- a/mm/util.c
+++ b/mm/util.c
@@ -389,7 +389,7 @@ bool page_mapped(struct page *page)
                return true;
        if (PageHuge(page))
                return false;
-       for (i = 0; i < hpage_nr_pages(page); i++) {
+       for (i = 0; i < (1 << compound_order(page)); i++) {
                if (atomic_read(&page[i]._mapcount) >= 0)
                        return true;
        }
diff --git a/net/sunrpc/svc.c b/net/sunrpc/svc.c
index 272c34551979..eea18a124e4f 100644
--- a/net/sunrpc/svc.c
+++ b/net/sunrpc/svc.c
@@ -1137,6 +1137,8 @@ void svc_printk(struct svc_rqst *rqstp, const char *fmt, 
...)
 static __printf(2,3) void svc_printk(struct svc_rqst *rqstp, const char *fmt, 
...) {}
 #endif
 
+extern void svc_tcp_prep_reply_hdr(struct svc_rqst *);
+
 /*
  * Common routine for processing the RPC request.
  */
@@ -1166,7 +1168,8 @@ svc_process_common(struct svc_rqst *rqstp, struct kvec 
*argv, struct kvec *resv)
        clear_bit(RQ_DROPME, &rqstp->rq_flags);
 
        /* Setup reply header */
-       rqstp->rq_xprt->xpt_ops->xpo_prep_reply_hdr(rqstp);
+       if (rqstp->rq_prot == IPPROTO_TCP)
+               svc_tcp_prep_reply_hdr(rqstp);
 
        svc_putu32(resv, rqstp->rq_xid);
 
@@ -1312,7 +1315,7 @@ svc_process_common(struct svc_rqst *rqstp, struct kvec 
*argv, struct kvec *resv)
        return 0;
 
  close:
-       if (test_bit(XPT_TEMP, &rqstp->rq_xprt->xpt_flags))
+       if (rqstp->rq_xprt && test_bit(XPT_TEMP, &rqstp->rq_xprt->xpt_flags))
                svc_close_xprt(rqstp->rq_xprt);
        dprintk("svc: svc_process close\n");
        return 0;
@@ -1439,10 +1442,10 @@ bc_svc_process(struct svc_serv *serv, struct rpc_rqst 
*req,
        dprintk("svc: %s(%p)\n", __func__, req);
 
        /* Build the svc_rqst used by the common processing routine */
-       rqstp->rq_xprt = serv->sv_bc_xprt;
        rqstp->rq_xid = req->rq_xid;
        rqstp->rq_prot = req->rq_xprt->prot;
        rqstp->rq_server = serv;
+       rqstp->rq_bc_net = req->rq_xprt->xprt_net;
 
        rqstp->rq_addrlen = sizeof(req->rq_xprt->addr);
        memcpy(&rqstp->rq_addr, &req->rq_xprt->addr, rqstp->rq_addrlen);
diff --git a/net/sunrpc/svc_xprt.c b/net/sunrpc/svc_xprt.c
index 064f20bb845a..42ce3ed21637 100644
--- a/net/sunrpc/svc_xprt.c
+++ b/net/sunrpc/svc_xprt.c
@@ -510,10 +510,11 @@ static struct svc_xprt *svc_xprt_dequeue(struct svc_pool 
*pool)
  */
 void svc_reserve(struct svc_rqst *rqstp, int space)
 {
+       struct svc_xprt *xprt = rqstp->rq_xprt;
+
        space += rqstp->rq_res.head[0].iov_len;
 
-       if (space < rqstp->rq_reserved) {
-               struct svc_xprt *xprt = rqstp->rq_xprt;
+       if (xprt && space < rqstp->rq_reserved) {
                atomic_sub((rqstp->rq_reserved - space), &xprt->xpt_reserved);
                rqstp->rq_reserved = space;
 
diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c
index 33f599cb0936..fd7fbe91955e 100644
--- a/net/sunrpc/svcsock.c
+++ b/net/sunrpc/svcsock.c
@@ -1195,7 +1195,7 @@ static int svc_tcp_sendto(struct svc_rqst *rqstp)
 /*
  * Setup response header. TCP has a 4B record length field.
  */
-static void svc_tcp_prep_reply_hdr(struct svc_rqst *rqstp)
+void svc_tcp_prep_reply_hdr(struct svc_rqst *rqstp)
 {
        struct kvec *resv = &rqstp->rq_res.head[0];
 
diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index 0fd31cff483e..0fc05ebdf81a 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -4841,6 +4841,13 @@ static void alc280_fixup_hp_9480m(struct hda_codec 
*codec,
        }
 }
 
+static void alc_fixup_disable_mic_vref(struct hda_codec *codec,
+                                 const struct hda_fixup *fix, int action)
+{
+       if (action == HDA_FIXUP_ACT_PRE_PROBE)
+               snd_hda_codec_set_pin_target(codec, 0x19, PIN_VREFHIZ);
+}
+
 /* for hda_fixup_thinkpad_acpi() */
 #include "thinkpad_helper.c"
 
@@ -4947,6 +4954,7 @@ enum {
        ALC293_FIXUP_LENOVO_SPK_NOISE,
        ALC233_FIXUP_LENOVO_LINE2_MIC_HOTKEY,
        ALC255_FIXUP_DELL_SPK_NOISE,
+       ALC225_FIXUP_DISABLE_MIC_VREF,
        ALC225_FIXUP_DELL1_MIC_NO_PRESENCE,
        ALC295_FIXUP_DISABLE_DAC3,
        ALC280_FIXUP_HP_HEADSET_MIC,
@@ -5605,6 +5613,12 @@ static const struct hda_fixup alc269_fixups[] = {
                .chained = true,
                .chain_id = ALC255_FIXUP_DELL1_MIC_NO_PRESENCE
        },
+       [ALC225_FIXUP_DISABLE_MIC_VREF] = {
+               .type = HDA_FIXUP_FUNC,
+               .v.func = alc_fixup_disable_mic_vref,
+               .chained = true,
+               .chain_id = ALC269_FIXUP_DELL1_MIC_NO_PRESENCE
+       },
        [ALC225_FIXUP_DELL1_MIC_NO_PRESENCE] = {
                .type = HDA_FIXUP_VERBS,
                .v.verbs = (const struct hda_verb[]) {
@@ -5614,7 +5628,7 @@ static const struct hda_fixup alc269_fixups[] = {
                        {}
                },
                .chained = true,
-               .chain_id = ALC269_FIXUP_DELL1_MIC_NO_PRESENCE
+               .chain_id = ALC225_FIXUP_DISABLE_MIC_VREF
        },
        [ALC280_FIXUP_HP_HEADSET_MIC] = {
                .type = HDA_FIXUP_FUNC,

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