From: Suneel Garapati <sgarap...@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 <sgarap...@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)
--
2.23.0
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