diff --git a/Makefile b/Makefile
index 8c56b60..c9803a7 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 VERSION = 2
 PATCHLEVEL = 6
 SUBLEVEL = 32
-EXTRAVERSION = .52+drm33.21
+EXTRAVERSION = .53+drm33.21
 NAME = Man-Eating Seals of Antiquity

 # *DOCUMENTATION*
diff --git a/arch/arm/plat-mxc/pwm.c b/arch/arm/plat-mxc/pwm.c
index 5cdbd60..1640486 100644
--- a/arch/arm/plat-mxc/pwm.c
+++ b/arch/arm/plat-mxc/pwm.c
@@ -31,6 +31,9 @@
 #define MX3_PWMSAR                0x0C    /* PWM Sample Register */
 #define MX3_PWMPR                 0x10    /* PWM Period Register */
 #define MX3_PWMCR_PRESCALER(x)    (((x - 1) & 0xFFF) << 4)
+#define MX3_PWMCR_DOZEEN                (1 << 24)
+#define MX3_PWMCR_WAITEN                (1 << 23)
+#define MX3_PWMCR_DBGEN			(1 << 22)
 #define MX3_PWMCR_CLKSRC_IPG_HIGH (2 << 16)
 #define MX3_PWMCR_CLKSRC_IPG      (1 << 16)
 #define MX3_PWMCR_EN              (1 << 0)
@@ -73,10 +76,21 @@ int pwm_config(struct pwm_device *pwm, int duty_ns, int period_ns)
 		do_div(c, period_ns);
 		duty_cycles = c;

+		/*
+		 * according to imx pwm RM, the real period value should be
+		 * PERIOD value in PWMPR plus 2.
+		 */
+		if (period_cycles > 2)
+			period_cycles -= 2;
+		else
+			period_cycles = 0;
+
 		writel(duty_cycles, pwm->mmio_base + MX3_PWMSAR);
 		writel(period_cycles, pwm->mmio_base + MX3_PWMPR);

-		cr = MX3_PWMCR_PRESCALER(prescale) | MX3_PWMCR_EN;
+		cr = MX3_PWMCR_PRESCALER(prescale) |
+			MX3_PWMCR_DOZEEN | MX3_PWMCR_WAITEN |
+			MX3_PWMCR_DBGEN | MX3_PWMCR_EN;

 		if (cpu_is_mx25())
 			cr |= MX3_PWMCR_CLKSRC_IPG;
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index 1c9fba6..e5c77d8 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -1981,7 +1981,7 @@ static int cfq_cic_link(struct cfq_data *cfqd, struct io_context *ioc,
 		}
 	}

-	if (ret)
+	if (ret && ret != -EEXIST)
 		printk(KERN_ERR "cfq: cic link failed!\n");

 	return ret;
@@ -1997,6 +1997,7 @@ cfq_get_io_context(struct cfq_data *cfqd, gfp_t gfp_mask)
 {
 	struct io_context *ioc = NULL;
 	struct cfq_io_context *cic;
+	int ret;

 	might_sleep_if(gfp_mask & __GFP_WAIT);

@@ -2004,6 +2005,7 @@ cfq_get_io_context(struct cfq_data *cfqd, gfp_t gfp_mask)
 	if (!ioc)
 		return NULL;

+retry:
 	cic = cfq_cic_lookup(cfqd, ioc);
 	if (cic)
 		goto out;
@@ -2012,7 +2014,12 @@ cfq_get_io_context(struct cfq_data *cfqd, gfp_t gfp_mask)
 	if (cic == NULL)
 		goto err;

-	if (cfq_cic_link(cfqd, ioc, cic, gfp_mask))
+	ret = cfq_cic_link(cfqd, ioc, cic, gfp_mask);
+	if (ret == -EEXIST) {
+		/* someone has linked cic to ioc already */
+		cfq_cic_free(cic);
+		goto retry;
+	} else if (ret)
 		goto err_free;

 out:
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index 705a589..68d800f 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -232,8 +232,12 @@ mmci_cmd_irq(struct mmci_host *host, struct mmc_command *cmd,
 	}

 	if (!cmd->data || cmd->error) {
-		if (host->data)
+		if (host->data) {
+			/* Terminate the DMA transfer */
+			if (dma_inprogress(host))
+				mmci_dma_data_error(host);
 			mmci_stop_data(host);
+		}
 		mmci_request_end(host, cmd->mrq);
 	} else if (!(cmd->data->flags & MMC_DATA_READ)) {
 		mmci_start_data(host, cmd->data);
diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index 54e716a..31be89b 100644
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -2472,6 +2472,9 @@ static void ath9k_sta_notify(struct ieee80211_hw *hw,
 	struct ath_wiphy *aphy = hw->priv;
 	struct ath_softc *sc = aphy->sc;

+	if (!(sc->sc_flags & SC_OP_TXAGGR))
+		return;
+
 	switch (cmd) {
 	case STA_NOTIFY_ADD:
 		ath_node_attach(sc, sta);
diff --git a/drivers/scsi/mpt2sas/mpt2sas_scsih.c b/drivers/scsi/mpt2sas/mpt2sas_scsih.c
index cb972b6..11253d9 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_scsih.c
+++ b/drivers/scsi/mpt2sas/mpt2sas_scsih.c
@@ -3145,7 +3145,7 @@ _scsih_smart_predicted_fault(struct MPT2SAS_ADAPTER *ioc, u16 handle)
 	/* insert into event log */
 	sz = offsetof(Mpi2EventNotificationReply_t, EventData) +
 	     sizeof(Mpi2EventDataSasDeviceStatusChange_t);
-	event_reply = kzalloc(sz, GFP_KERNEL);
+	event_reply = kzalloc(sz, GFP_ATOMIC);
 	if (!event_reply) {
 		printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
 		    ioc->name, __FILE__, __LINE__, __func__);
diff --git a/drivers/watchdog/hpwdt.c b/drivers/watchdog/hpwdt.c
index 0b91907..2a9f54a 100644
--- a/drivers/watchdog/hpwdt.c
+++ b/drivers/watchdog/hpwdt.c
@@ -220,6 +220,7 @@ static int __devinit cru_detect(unsigned long map_entry,

 	cmn_regs.u1.reax = CRU_BIOS_SIGNATURE_VALUE;

+	set_memory_x((unsigned long)bios32_entrypoint, (2 * PAGE_SIZE));
 	asminline_call(&cmn_regs, bios32_entrypoint);

 	if (cmn_regs.u1.ral != 0) {
@@ -237,8 +238,10 @@ static int __devinit cru_detect(unsigned long map_entry,
 		if ((physical_bios_base + physical_bios_offset)) {
 			cru_rom_addr =
 				ioremap(cru_physical_address, cru_length);
-			if (cru_rom_addr)
+			if (cru_rom_addr) {
+				set_memory_x((unsigned long)cru_rom_addr, cru_length);
 				retval = 0;
+			}
 		}

 		printk(KERN_DEBUG "hpwdt: CRU Base Address:   0x%lx\n",
diff --git a/kernel/hung_task.c b/kernel/hung_task.c
index d4e84174..07187ae 100644
--- a/kernel/hung_task.c
+++ b/kernel/hung_task.c
@@ -74,11 +74,17 @@ static void check_hung_task(struct task_struct *t, unsigned long timeout)

 	/*
 	 * Ensure the task is not frozen.
-	 * Also, when a freshly created task is scheduled once, changes
-	 * its state to TASK_UNINTERRUPTIBLE without having ever been
-	 * switched out once, it musn't be checked.
+	 * Also, skip vfork and any other user process that freezer should skip.
 	 */
-	if (unlikely(t->flags & PF_FROZEN || !switch_count))
+	if (unlikely(t->flags & (PF_FROZEN | PF_FREEZER_SKIP)))
+	    return;
+
+	/*
+	 * When a freshly created task is scheduled once, changes its state to
+	 * TASK_UNINTERRUPTIBLE without having ever been switched out once, it
+	 * musn't be checked.
+	 */
+	if (unlikely(!switch_count))
 		return;

 	if (switch_count != t->last_switch_count) {
diff --git a/mm/filemap.c b/mm/filemap.c
index 9e0826e..a1fe378 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -1675,7 +1675,7 @@ repeat:
 		page = __page_cache_alloc(gfp | __GFP_COLD);
 		if (!page)
 			return ERR_PTR(-ENOMEM);
-		err = add_to_page_cache_lru(page, mapping, index, GFP_KERNEL);
+		err = add_to_page_cache_lru(page, mapping, index, gfp);
 		if (unlikely(err)) {
 			page_cache_release(page);
 			if (err == -EEXIST)
@@ -1772,10 +1772,7 @@ static struct page *wait_on_page_read(struct page *page)
  * @gfp:	the page allocator flags to use if allocating
  *
  * This is the same as "read_mapping_page(mapping, index, NULL)", but with
- * any new page allocations done using the specified allocation flags. Note
- * that the Radix tree operations will still use GFP_KERNEL, so you can't
- * expect to do this atomically or anything like that - but you can pass in
- * other page requirements.
+ * any new page allocations done using the specified allocation flags.
  *
  * If the page does not get brought uptodate, return -EIO.
  */
