icside: icside_dma_setup() fixes

Check for ide_build_sglist() return value and re-map sg table if necessary.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

diff --git a/drivers/ide/icside.c b/drivers/ide/icside.c
index 0cf47e6..cf0522f 100644 (file)
--- a/drivers/ide/icside.c
+++ b/drivers/ide/icside.c
@@ -326,6 +326,10 @@ static int icside_dma_setup(ide_drive_t *drive)
        BUG_ON(dma_channel_active(ec->dma));
 
        hwif->sg_nents = ide_build_sglist(drive, rq);
+       if (hwif->sg_nents == 0) {
+               ide_map_sg(drive, rq);
+               return 1;
+       }
 
        /*
         * Ensure that we have the right interrupt routed.