Merge branch 'linus' into perfcounters/core-v2

Merge reason: we have gathered quite a few conflicts, need to merge upstream

Conflicts:
	arch/powerpc/kernel/Makefile
	arch/x86/ia32/ia32entry.S
	arch/x86/include/asm/hardirq.h
	arch/x86/include/asm/unistd_32.h
	arch/x86/include/asm/unistd_64.h
	arch/x86/kernel/cpu/common.c
	arch/x86/kernel/irq.c
	arch/x86/kernel/syscall_table_32.S
	arch/x86/mm/iomap_32.c
	include/linux/sched.h
	kernel/Makefile

Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 22 insertions, 4 deletions

diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index ce2ef0475339..01831312c360 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -547,7 +547,7 @@ void ata_scsi_error(struct Scsi_Host *host)
 
 	/* For new EH, all qcs are finished in one of three ways -
 	 * normal completion, error completion, and SCSI timeout.
-	 * Both cmpletions can race against SCSI timeout.  When normal
+	 * Both completions can race against SCSI timeout.  When normal
 	 * completion wins, the qc never reaches EH.  When error
 	 * completion wins, the qc has ATA_QCFLAG_FAILED set.
 	 *
@@ -562,7 +562,19 @@ void ata_scsi_error(struct Scsi_Host *host)
 		int nr_timedout = 0;
 
 		spin_lock_irqsave(ap->lock, flags);
-
+		
+		/* This must occur under the ap->lock as we don't want
+		   a polled recovery to race the real interrupt handler
+		   
+		   The lost_interrupt handler checks for any completed but
+		   non-notified command and completes much like an IRQ handler.
+		   
+		   We then fall into the error recovery code which will treat
+		   this as if normal completion won the race */
+
+		if (ap->ops->lost_interrupt)
+			ap->ops->lost_interrupt(ap);
+			
 		list_for_each_entry_safe(scmd, tmp, &host->eh_cmd_q, eh_entry) {
 			struct ata_queued_cmd *qc;
 
@@ -606,6 +618,9 @@ void ata_scsi_error(struct Scsi_Host *host)
 		ap->eh_tries = ATA_EH_MAX_TRIES;
 	} else
 		spin_unlock_wait(ap->lock);
+		
+	/* If we timed raced normal completion and there is nothing to
+	   recover nr_timedout == 0 why exactly are we doing error recovery ? */
 
  repeat:
 	/* invoke error handler */
@@ -2423,11 +2438,14 @@ int ata_eh_reset(struct ata_link *link, int classify,
 		}
 
 		/* prereset() might have cleared ATA_EH_RESET.  If so,
-		 * bang classes and return.
+		 * bang classes, thaw and return.
 		 */
 		if (reset && !(ehc->i.action & ATA_EH_RESET)) {
 			ata_for_each_dev(dev, link, ALL)
 				classes[dev->devno] = ATA_DEV_NONE;
+			if ((ap->pflags & ATA_PFLAG_FROZEN) &&
+			    ata_is_host_link(link))
+				ata_eh_thaw_port(ap);
 			rc = 0;
 			goto out;
 		}
@@ -2901,7 +2919,7 @@ static int atapi_eh_clear_ua(struct ata_device *dev)
 	int i;
 
 	for (i = 0; i < ATA_EH_UA_TRIES; i++) {
-		u8 sense_buffer[SCSI_SENSE_BUFFERSIZE];
+		u8 *sense_buffer = dev->link->ap->sector_buf;
 		u8 sense_key = 0;
 		unsigned int err_mask;