Btrfs: limit balancing work while flushing delayed refs

[linux-2.6-omap-h63xx.git] / drivers / ide / ide-dma.c

diff --git a/drivers/ide/ide-dma.c b/drivers/ide/ide-dma.c
index 72ebab0bc755571c0735b87aed3574a72db12eec..059c90bb5ad2f4082c52ad695100ea83490c0263 100644 (file)
--- a/drivers/ide/ide-dma.c
+++ b/drivers/ide/ide-dma.c
@@ -128,6 +128,7 @@ int ide_build_sglist(ide_drive_t *drive, struct request *rq)
 {
        ide_hwif_t *hwif = drive->hwif;
        struct scatterlist *sg = hwif->sg_table;
+       int i;
 
        ide_map_sg(drive, rq);
 
@@ -136,8 +137,13 @@ int ide_build_sglist(ide_drive_t *drive, struct request *rq)
        else
                hwif->sg_dma_direction = DMA_TO_DEVICE;
 
-       return dma_map_sg(hwif->dev, sg, hwif->sg_nents,
-                         hwif->sg_dma_direction);
+       i = dma_map_sg(hwif->dev, sg, hwif->sg_nents, hwif->sg_dma_direction);
+       if (i) {
+               hwif->orig_sg_nents = hwif->sg_nents;
+               hwif->sg_nents = i;
+       }
+
+       return i;
 }
 EXPORT_SYMBOL_GPL(ide_build_sglist);
 
@@ -156,7 +162,7 @@ void ide_destroy_dmatable(ide_drive_t *drive)
 {
        ide_hwif_t *hwif = drive->hwif;
 
-       dma_unmap_sg(hwif->dev, hwif->sg_table, hwif->sg_nents,
+       dma_unmap_sg(hwif->dev, hwif->sg_table, hwif->orig_sg_nents,
                     hwif->sg_dma_direction);
 }
 EXPORT_SYMBOL_GPL(ide_destroy_dmatable);