mlx4_en: Fix a kernel panic when waking tx queue

[safe/jmp/linux-2.6] / drivers / ide / hpt366.c

diff --git a/drivers/ide/hpt366.c b/drivers/ide/hpt366.c
index dbaf184..0feb66c 100644 (file)
--- a/drivers/ide/hpt366.c
+++ b/drivers/ide/hpt366.c
@@ -3,7 +3,7 @@
  * Portions Copyright (C) 2001         Sun Microsystems, Inc.
  * Portions Copyright (C) 2003         Red Hat Inc
  * Portions Copyright (C) 2007         Bartlomiej Zolnierkiewicz
- * Portions Copyright (C) 2005-2008    MontaVista Software, Inc.
+ * Portions Copyright (C) 2005-2009    MontaVista Software, Inc.
  *
  * Thanks to HighPoint Technologies for their assistance, and hardware.
  * Special Thanks to Jon Burchmore in SanDiego for the deep pockets, his
@@ -114,6 +114,8 @@
  *   the register setting lists into the table indexed by the clock selected
  * - set the correct hwif->ultra_mask for each individual chip
  * - add Ultra and MW DMA mode filtering for the HPT37[24] based SATA cards
+ * - stop resetting HPT370's state machine before each DMA transfer as that has
+ *   caused more harm than good
  *     Sergei Shtylyov, <sshtylyov@ru.mvista.com> or <source@mvista.com>
  */
 
@@ -133,7 +135,7 @@
 #define DRV_NAME "hpt366"
 
 /* various tuning parameters */
-#define HPT_RESET_STATE_ENGINE
+#undef HPT_RESET_STATE_ENGINE
 #undef HPT_DELAY_INTERRUPT
 
 static const char *quirk_drives[] = {
@@ -808,7 +810,7 @@ static void hpt370_irq_timeout(ide_drive_t *drive)
        /* get DMA command mode */
        dma_cmd = inb(hwif->dma_base + ATA_DMA_CMD);
        /* stop DMA */
-       outb(dma_cmd & ~0x1, hwif->dma_base + ATA_DMA_CMD);
+       outb(dma_cmd & ~ATA_DMA_START, hwif->dma_base + ATA_DMA_CMD);
        hpt370_clear_engine(drive);
 }
 
@@ -825,22 +827,16 @@ static int hpt370_dma_end(ide_drive_t *drive)
        ide_hwif_t *hwif        = drive->hwif;
        u8  dma_stat            = inb(hwif->dma_base + ATA_DMA_STATUS);
 
-       if (dma_stat & 0x01) {
+       if (dma_stat & ATA_DMA_ACTIVE) {
                /* wait a little */
                udelay(20);
                dma_stat = inb(hwif->dma_base + ATA_DMA_STATUS);
-               if (dma_stat & 0x01)
+               if (dma_stat & ATA_DMA_ACTIVE)
                        hpt370_irq_timeout(drive);
        }
        return ide_dma_end(drive);
 }
 
-static void hpt370_dma_timeout(ide_drive_t *drive)
-{
-       hpt370_irq_timeout(drive);
-       ide_dma_timeout(drive);
-}
-
 /* returns 1 if DMA IRQ issued, 0 otherwise */
 static int hpt374_dma_test_irq(ide_drive_t *drive)
 {
@@ -857,7 +853,7 @@ static int hpt374_dma_test_irq(ide_drive_t *drive)
 
        dma_stat = inb(hwif->dma_base + ATA_DMA_STATUS);
        /* return 1 if INTR asserted */
-       if (dma_stat & 4)
+       if (dma_stat & ATA_DMA_INTR)
                return 1;
 
        return 0;
@@ -1423,7 +1419,6 @@ static const struct ide_dma_ops hpt37x_dma_ops = {
        .dma_test_irq           = hpt374_dma_test_irq,
        .dma_lost_irq           = ide_dma_lost_irq,
        .dma_timer_expiry       = ide_dma_sff_timer_expiry,
-       .dma_timeout            = ide_dma_timeout,
        .dma_sff_read_status    = ide_dma_sff_read_status,
 };
 
@@ -1435,7 +1430,7 @@ static const struct ide_dma_ops hpt370_dma_ops = {
        .dma_test_irq           = ide_dma_test_irq,
        .dma_lost_irq           = ide_dma_lost_irq,
        .dma_timer_expiry       = ide_dma_sff_timer_expiry,
-       .dma_timeout            = hpt370_dma_timeout,
+       .dma_clear              = hpt370_irq_timeout,
        .dma_sff_read_status    = ide_dma_sff_read_status,
 };
 
@@ -1447,7 +1442,6 @@ static const struct ide_dma_ops hpt36x_dma_ops = {
        .dma_test_irq           = ide_dma_test_irq,
        .dma_lost_irq           = hpt366_dma_lost_irq,
        .dma_timer_expiry       = ide_dma_sff_timer_expiry,
-       .dma_timeout            = ide_dma_timeout,
        .dma_sff_read_status    = ide_dma_sff_read_status,
 };