[POWERPC] Fix viodasd geometry calculations

[karo-tx-linux.git] / drivers / block / viodasd.c

diff --git a/drivers/block/viodasd.c b/drivers/block/viodasd.c
index e19ba4ebcd4e2c4763c926bfae4be82135962c0a..dae39911a11dd37a93c7c0323423c0d78357a563 100644 (file)
--- a/drivers/block/viodasd.c
+++ b/drivers/block/viodasd.c
@@ -49,6 +49,7 @@
 #include <asm/iseries/hv_lp_event.h>
 #include <asm/iseries/hv_lp_config.h>
 #include <asm/iseries/vio.h>
+#include <asm/firmware.h>
 
 MODULE_DESCRIPTION("iSeries Virtual DASD");
 MODULE_AUTHOR("Dave Boutcher");
@@ -251,10 +252,10 @@ static int viodasd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
        struct gendisk *disk = bdev->bd_disk;
        struct viodasd_device *d = disk->private_data;
 
-       geo->sectors = d->sectors ? d->sectors : 0;
+       geo->sectors = d->sectors ? d->sectors : 32;
        geo->heads = d->tracks ? d->tracks  : 64;
        geo->cylinders = d->cylinders ? d->cylinders :
-               get_capacity(disk) / (geo->cylinders * geo->heads);
+               get_capacity(disk) / (geo->sectors * geo->heads);
 
        return 0;
 }
@@ -769,6 +770,11 @@ static int __init viodasd_init(void)
 {
        int rc;
 
+       if (!firmware_has_feature(FW_FEATURE_ISERIES)) {
+               rc = -ENODEV;
+               goto early_fail;
+       }
+
        /* Try to open to our host lp */
        if (viopath_hostLp == HvLpIndexInvalid)
                vio_set_hostlp();