---

yaml
---
r: 87484
b: refs/heads/master
c: f79abb6
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: d7a0e1f56472db0825e13f9dd39f0ad79b8c8b3e
+refs/heads/master: f79abb627f033c85a6088231f20c85bc4a9bd757

trunk/drivers/acpi/ec.c

@@ -129,6 +129,7 @@ static struct acpi_ec {
 	struct mutex lock;
 	wait_queue_head_t wait;
 	struct list_head list;
+	atomic_t irq_count;
 	u8 handlers_installed;
 } *boot_ec, *first_ec;
 
@@ -181,6 +182,8 @@ static int acpi_ec_wait(struct acpi_ec *ec, enum ec_event event, int force_poll)
 {
 	int ret = 0;
 
+	atomic_set(&ec->irq_count, 0);
+
 	if (unlikely(event == ACPI_EC_EVENT_OBF_1 &&
 		     test_bit(EC_FLAGS_NO_OBF1_GPE, &ec->flags)))
 		force_poll = 1;
@@ -227,6 +230,7 @@ static int acpi_ec_wait(struct acpi_ec *ec, enum ec_event event, int force_poll)
 		while (time_before(jiffies, delay)) {
 			if (acpi_ec_check_status(ec, event))
 				goto end;
+			msleep(5);
 		}
 	}
 	pr_err(PREFIX "acpi_ec_wait timeout,"
@@ -529,6 +533,13 @@ static u32 acpi_ec_gpe_handler(void *data)
 	struct acpi_ec *ec = data;
 
 	pr_debug(PREFIX "~~~> interrupt\n");
+	atomic_inc(&ec->irq_count);
+	if (atomic_read(&ec->irq_count) > 5) {
+		pr_err(PREFIX "GPE storm detected, disabling EC GPE\n");
+		acpi_disable_gpe(NULL, ec->gpe, ACPI_ISR);
+		clear_bit(EC_FLAGS_GPE_MODE, &ec->flags);
+		return ACPI_INTERRUPT_HANDLED;
+	}
 	clear_bit(EC_FLAGS_WAIT_GPE, &ec->flags);
 	if (test_bit(EC_FLAGS_GPE_MODE, &ec->flags))
 		wake_up(&ec->wait);

trunk/drivers/dma/fsldma.c

@@ -123,6 +123,11 @@ static dma_addr_t get_ndar(struct fsl_dma_chan *fsl_chan)
 	return DMA_IN(fsl_chan, &fsl_chan->reg_base->ndar, 64);
 }
 
+static u32 get_bcr(struct fsl_dma_chan *fsl_chan)
+{
+	return DMA_IN(fsl_chan, &fsl_chan->reg_base->bcr, 32);
+}
+
 static int dma_is_idle(struct fsl_dma_chan *fsl_chan)
 {
 	u32 sr = get_sr(fsl_chan);
@@ -426,6 +431,9 @@ fsl_dma_prep_interrupt(struct dma_chan *chan)
 	new->async_tx.cookie = -EBUSY;
 	new->async_tx.ack = 0;
 
+	/* Insert the link descriptor to the LD ring */
+	list_add_tail(&new->node, &new->async_tx.tx_list);
+
 	/* Set End-of-link to the last link descriptor of new list*/
 	set_ld_eol(fsl_chan, new);
 
@@ -701,6 +709,23 @@ static irqreturn_t fsl_dma_chan_do_interrupt(int irq, void *data)
 	if (stat & FSL_DMA_SR_TE)
 		dev_err(fsl_chan->dev, "Transfer Error!\n");
 
+	/* Programming Error
+	 * The DMA_INTERRUPT async_tx is a NULL transfer, which will
+	 * triger a PE interrupt.
+	 */
+	if (stat & FSL_DMA_SR_PE) {
+		dev_dbg(fsl_chan->dev, "event: Programming Error INT\n");
+		if (get_bcr(fsl_chan) == 0) {
+			/* BCR register is 0, this is a DMA_INTERRUPT async_tx.
+			 * Now, update the completed cookie, and continue the
+			 * next uncompleted transfer.
+			 */
+			fsl_dma_update_completed_cookie(fsl_chan);
+			fsl_chan_xfer_ld_queue(fsl_chan);
+		}
+		stat &= ~FSL_DMA_SR_PE;
+	}
+
 	/* If the link descriptor segment transfer finishes,
 	 * we will recycle the used descriptor.
 	 */
@@ -841,6 +866,11 @@ static int fsl_dma_self_test(struct fsl_dma_chan *fsl_chan)
 	tx3 = fsl_dma_prep_memcpy(chan, dma_dest, dma_src, test_size / 4, 0);
 	async_tx_ack(tx3);
 
+	/* Interrupt tx test */
+	tx1 = fsl_dma_prep_interrupt(chan);
+	async_tx_ack(tx1);
+	cookie = fsl_dma_tx_submit(tx1);
+
 	/* Test exchanging the prepared tx sort */
 	cookie = fsl_dma_tx_submit(tx3);
 	cookie = fsl_dma_tx_submit(tx2);

trunk/drivers/dma/fsldma.h

@@ -40,6 +40,7 @@
 #define FSL_DMA_MR_EOTIE	0x00000080
 
 #define FSL_DMA_SR_CH		0x00000020
+#define FSL_DMA_SR_PE		0x00000010
 #define FSL_DMA_SR_CB		0x00000004
 #define FSL_DMA_SR_TE		0x00000080
 #define FSL_DMA_SR_EOSI		0x00000002

trunk/drivers/ide/ide-taskfile.c

@@ -422,25 +422,6 @@ void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
 		ide_end_request(drive, 1, rq->nr_sectors);
 }
 
-/*
- * We got an interrupt on a task_in case, but no errors and no DRQ.
- *
- * It might be a spurious irq (shared irq), but it might be a
- * command that had no output.
- */
-static ide_startstop_t task_in_unexpected(ide_drive_t *drive, struct request *rq, u8 stat)
-{
-	/* Command all done? */
-	if (OK_STAT(stat, READY_STAT, BUSY_STAT)) {
-		task_end_request(drive, rq, stat);
-		return ide_stopped;
-	}
-
-	/* Assume it was a spurious irq */
-	ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
-	return ide_started;
-}
-
 /*
  * Handler for command with PIO data-in phase (Read/Read Multiple).
  */
@@ -450,17 +431,18 @@ static ide_startstop_t task_in_intr(ide_drive_t *drive)
 	struct request *rq = HWGROUP(drive)->rq;
 	u8 stat = ide_read_status(drive);
 
-	/* Error? */
-	if (stat & ERR_STAT)
-		return task_error(drive, rq, __FUNCTION__, stat);
-
-	/* Didn't want any data? Odd. */
-	if (!(stat & DRQ_STAT))
-		return task_in_unexpected(drive, rq, stat);
+	/* new way for dealing with premature shared PCI interrupts */
+	if (!OK_STAT(stat, DRQ_STAT, BAD_R_STAT)) {
+		if (stat & (ERR_STAT | DRQ_STAT))
+			return task_error(drive, rq, __FUNCTION__, stat);
+		/* No data yet, so wait for another IRQ. */
+		ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
+		return ide_started;
+	}
 
 	ide_pio_datablock(drive, rq, 0);
 
-	/* Are we done? Check status and finish transfer. */
+	/* If it was the last datablock check status and finish transfer. */
 	if (!hwif->nleft) {
 		stat = wait_drive_not_busy(drive);
 		if (!OK_STAT(stat, 0, BAD_STAT))

trunk/include/linux/sched.h

@@ -929,9 +929,6 @@ struct sched_entity {
 	u64			vruntime;
 	u64			prev_sum_exec_runtime;
 
-	u64			last_wakeup;
-	u64			avg_overlap;
-
 #ifdef CONFIG_SCHEDSTATS
 	u64			wait_start;
 	u64			wait_max;

trunk/include/linux/topology.h

@@ -138,6 +138,7 @@
 				| SD_BALANCE_FORK	\
 				| SD_BALANCE_EXEC	\
 				| SD_WAKE_AFFINE	\
+				| SD_WAKE_IDLE		\
 				| SD_SHARE_PKG_RESOURCES\
 				| BALANCE_FOR_MC_POWER,	\
 	.last_balance		= jiffies,		\

trunk/kernel/sched.c

@@ -1396,12 +1396,6 @@ task_hot(struct task_struct *p, u64 now, struct sched_domain *sd)
 {
 	s64 delta;
 
-	/*
-	 * Buddy candidates are cache hot:
-	 */
-	if (&p->se == cfs_rq_of(&p->se)->next)
-		return 1;
-
 	if (p->sched_class != &fair_sched_class)
 		return 0;
 
@@ -1861,11 +1855,10 @@ static int try_to_wake_up(struct task_struct *p, unsigned int state, int sync)
 		schedstat_inc(p, se.nr_wakeups_remote);
 	update_rq_clock(rq);
 	activate_task(rq, p, 1);
+	check_preempt_curr(rq, p);
 	success = 1;
 
 out_running:
-	check_preempt_curr(rq, p);
-
 	p->state = TASK_RUNNING;
 #ifdef CONFIG_SMP
 	if (p->sched_class->task_wake_up)
@@ -1899,8 +1892,6 @@ static void __sched_fork(struct task_struct *p)
 	p->se.exec_start		= 0;
 	p->se.sum_exec_runtime		= 0;
 	p->se.prev_sum_exec_runtime	= 0;
-	p->se.last_wakeup		= 0;
-	p->se.avg_overlap		= 0;
 
 #ifdef CONFIG_SCHEDSTATS
 	p->se.wait_start		= 0;

trunk/kernel/sched_debug.c

@@ -288,7 +288,6 @@ void proc_sched_show_task(struct task_struct *p, struct seq_file *m)
 	PN(se.exec_start);
 	PN(se.vruntime);
 	PN(se.sum_exec_runtime);
-	PN(se.avg_overlap);
 
 	nr_switches = p->nvcsw + p->nivcsw;