From: Suneel Garapati sgarapati@marvell.com
For platforms that support 64bit physical address, fill upper 32bit of buffer address in scatter-gather descriptor. This is needed for platforms with more than 4GB DRAM.
Signed-off-by: Suneel Garapati sgarapati@marvell.com --- drivers/ata/ahci.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c index ca075b58bc..5f929700c0 100644 --- a/drivers/ata/ahci.c +++ b/drivers/ata/ahci.c @@ -506,6 +506,11 @@ static int ahci_fill_sg(struct ahci_uc_priv *uc_priv, u8 port, ahci_sg->addr = cpu_to_le32((unsigned long) buf + i * MAX_DATA_BYTE_COUNT); ahci_sg->addr_hi = 0; +#ifdef CONFIG_PHYS_64BIT + ahci_sg->addr_hi = + cpu_to_le32((u32)(((u64)(buf + i * MAX_DATA_BYTE_COUNT) + >> 16) >> 16)); +#endif ahci_sg->flags_size = cpu_to_le32(0x3fffff & (buf_len < MAX_DATA_BYTE_COUNT ? (buf_len - 1)