1 files changed, 64 insertions, 8 deletions

diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c
index 4f2f138de2c..fb6795236e7 100644
--- a/drivers/ide/ide-io.c
+++ b/drivers/ide/ide-io.c
@@ -24,7 +24,6 @@
  */
  
  
-#include <linux/config.h>
 #include <linux/module.h>
 #include <linux/types.h>
 #include <linux/string.h>
@@ -223,6 +222,63 @@ static ide_startstop_t ide_start_power_step(ide_drive_t *drive, struct request *
 }
 
 /**
+ *      ide_end_dequeued_request        -       complete an IDE I/O
+ *      @drive: IDE device for the I/O
+ *      @uptodate:
+ *      @nr_sectors: number of sectors completed
+ *
+ *      Complete an I/O that is no longer on the request queue. This
+ *      typically occurs when we pull the request and issue a REQUEST_SENSE.
+ *      We must still finish the old request but we must not tamper with the
+ *      queue in the meantime.
+ *
+ *      NOTE: This path does not handle barrier, but barrier is not supported
+ *      on ide-cd anyway.
+ */
+
+int ide_end_dequeued_request(ide_drive_t *drive, struct request *rq,
+                             int uptodate, int nr_sectors)
+{
+        unsigned long flags;
+        int ret = 1;
+
+        spin_lock_irqsave(&ide_lock, flags);
+
+        BUG_ON(!(rq->flags & REQ_STARTED));
+
+        /*
+         * if failfast is set on a request, override number of sectors and
+         * complete the whole request right now
+         */
+        if (blk_noretry_request(rq) && end_io_error(uptodate))
+                nr_sectors = rq->hard_nr_sectors;
+
+        if (!blk_fs_request(rq) && end_io_error(uptodate) && !rq->errors)
+                rq->errors = -EIO;
+
+        /*
+         * decide whether to reenable DMA -- 3 is a random magic for now,
+         * if we DMA timeout more than 3 times, just stay in PIO
+         */
+        if (drive->state == DMA_PIO_RETRY && drive->retry_pio <= 3) {
+                drive->state = 0;
+                HWGROUP(drive)->hwif->ide_dma_on(drive);
+        }
+
+        if (!end_that_request_first(rq, uptodate, nr_sectors)) {
+                add_disk_randomness(rq->rq_disk);
+                if (blk_rq_tagged(rq))
+                        blk_queue_end_tag(drive->queue, rq);
+                end_that_request_last(rq, uptodate);
+                ret = 0;
+        }
+        spin_unlock_irqrestore(&ide_lock, flags);
+        return ret;
+}
+EXPORT_SYMBOL_GPL(ide_end_dequeued_request);
+
+
+/**
  *      ide_complete_pm_request - end the current Power Management request
  *      @drive: target drive
  *      @rq: request
@@ -448,7 +504,7 @@ static ide_startstop_t ide_ata_error(ide_drive_t *drive, struct request *rq, u8
                 }
         }
 
-        if ((stat & DRQ_STAT) && rq_data_dir(rq) == READ)
+        if ((stat & DRQ_STAT) && rq_data_dir(rq) == READ && hwif->err_stops_fifo == 0)
                 try_to_flush_leftover_data(drive);
 
         if (hwif->INB(IDE_STATUS_REG) & (BUSY_STAT|DRQ_STAT))
@@ -637,7 +693,7 @@ static ide_startstop_t drive_cmd_intr (ide_drive_t *drive)
         u8 stat = hwif->INB(IDE_STATUS_REG);
         int retries = 10;
 
-        local_irq_enable();
+        local_irq_enable_in_hardirq();
         if ((stat & DRQ_STAT) && args && args[3]) {
                 u8 io_32bit = drive->io_32bit;
                 drive->io_32bit = 0;
@@ -902,7 +958,7 @@ static void ide_check_pm_state(ide_drive_t *drive, struct request *rq)
                         printk(KERN_WARNING "%s: bus not ready on wakeup\n", drive->name);
                 SELECT_DRIVE(drive);
                 HWIF(drive)->OUTB(8, HWIF(drive)->io_ports[IDE_CONTROL_OFFSET]);
-                rc = ide_wait_not_busy(HWIF(drive), 10000);
+                rc = ide_wait_not_busy(HWIF(drive), 100000);
                 if (rc)
                         printk(KERN_WARNING "%s: drive not ready on wakeup\n", drive->name);
         }
@@ -1230,7 +1286,7 @@ static void ide_do_request (ide_hwgroup_t *hwgroup, int masked_irq)
                 if (masked_irq != IDE_NO_IRQ && hwif->irq != masked_irq)
                         disable_irq_nosync(hwif->irq);
                 spin_unlock(&ide_lock);
-                local_irq_enable();
+                local_irq_enable_in_hardirq();
                         /* allow other IRQs while we start this request */
                 startstop = start_request(drive, rq);
                 spin_lock_irq(&ide_lock);
@@ -1575,7 +1631,7 @@ irqreturn_t ide_intr (int irq, void *dev_id, struct pt_regs *regs)
         spin_unlock(&ide_lock);
 
         if (drive->unmask)
-                local_irq_enable();
+                local_irq_enable_in_hardirq();
         /* service this interrupt, may set handler for next interrupt */
         startstop = handler(drive);
         spin_lock_irq(&ide_lock);
@@ -1608,7 +1664,7 @@ irqreturn_t ide_intr (int irq, void *dev_id, struct pt_regs *regs)
  *      Initialize a request before we fill it in and send it down to
  *      ide_do_drive_cmd. Commands must be set up by this function. Right
  *      now it doesn't do a lot, but if that changes abusers will have a
- *      nasty suprise.
+ *      nasty surprise.
  */
 
 void ide_init_drive_cmd (struct request *rq)
@@ -1649,7 +1705,7 @@ int ide_do_drive_cmd (ide_drive_t *drive, struct request *rq, ide_action_t actio
 {
         unsigned long flags;
         ide_hwgroup_t *hwgroup = HWGROUP(drive);
-        DECLARE_COMPLETION(wait);
+        DECLARE_COMPLETION_ONSTACK(wait);
         int where = ELEVATOR_INSERT_BACK, err;
         int must_wait = (action == ide_wait || action == ide_head_wait);