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powerpc/axonram: Enable partitioning of the Axons DDR2 DIMMs 

DDR2 memory DIMMs on the Axon could be accessed only as one partition
when using file system drivers which are using the direct_access() method.
This patch enables for such file system drivers to access Axon's DDR2 memory
even if it is splitted in several partitions.

Signed-off-by: Maxim Shchetynin <maxim@de.ibm.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
hifive-unleashed-5.1
Maxim Shchetynin 2008-07-16 05:51:42 +10:00 committed by Benjamin Herrenschmidt
parent 9a23409b69
commit 8204cba7fa
1 changed files with 4 additions and 1 deletions
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5
arch/powerpc/sysdev/axonram.c
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@ -150,7 +150,10 @@ axon_ram_direct_access(struct block_device *device, sector_t sector,
struct axon_ram_bank *bank = device->bd_disk->private_data;
loff_t offset;
offset = sector << AXON_RAM_SECTOR_SHIFT;
offset = sector;
if (device->bd_part != NULL)
offset += device->bd_part->start_sect;
offset <<= AXON_RAM_SECTOR_SHIFT;
if (offset >= bank->size) {
dev_err(&bank->device->dev, "Access outside of address space\n");
return -ERANGE;