From: Boaz Harrosh <redacted>

This streamlines prd with the latest brd code.

In prd we do not allocate new devices dynamically on devnod
access, because we need parameterization of each device. So
the dynamic allocation in prd_init_one is removed.

Therefor prd_init_one only called from prd_prob is moved
there, now that it is small.

And other small fixes regarding partitions

Signed-off-by: Boaz Harrosh <redacted>
---
 drivers/block/prd.c | 47 ++++++++++++++++++++++++-----------------------
 1 file changed, 24 insertions(+), 23 deletions(-)

diff --git a/drivers/block/prd.c b/drivers/block/prd.c
index 62af81e..c4aeba7 100644
--- a/drivers/block/prd.c
+++ b/drivers/block/prd.c

@@ -218,13 +218,13 @@ static long prd_direct_access(struct block_device *bdev, sector_t sector,
 {
 	struct prd_device *prd = bdev->bd_disk->private_data;
 
-	if (!prd)
+	if (unlikely(!prd))
 		return -ENODEV;
 
 	*kaddr = prd_lookup_pg_addr(prd, sector);
 	*pfn = prd_lookup_pfn(prd, sector);
 
-	return size;
+	return min_t(long, size, prd->size);