libata: make ata_tf_to_lba[48]() generic
ata_tf_to_lba[48]() currently return LBA in tf + 1 for
ata_read_native_max_address(). Make them return LBA and make it
global so that it can be used to read LBA off TF for other purposes.
ata_read_native_max_address() now adds 1 itself.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 9121cc4..4d78f5d 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -1211,7 +1211,7 @@
}
}
-static u64 ata_tf_to_lba48(struct ata_taskfile *tf)
+u64 ata_tf_to_lba48(const struct ata_taskfile *tf)
{
u64 sectors = 0;
@@ -1222,10 +1222,10 @@
sectors |= (tf->lbam & 0xff) << 8;
sectors |= (tf->lbal & 0xff);
- return ++sectors;
+ return sectors;
}
-static u64 ata_tf_to_lba(struct ata_taskfile *tf)
+u64 ata_tf_to_lba(const struct ata_taskfile *tf)
{
u64 sectors = 0;
@@ -1234,7 +1234,7 @@
sectors |= (tf->lbam & 0xff) << 8;
sectors |= (tf->lbal & 0xff);
- return ++sectors;
+ return sectors;
}
/**
@@ -1279,9 +1279,9 @@
}
if (lba48)
- *max_sectors = ata_tf_to_lba48(&tf);
+ *max_sectors = ata_tf_to_lba48(&tf) + 1;
else
- *max_sectors = ata_tf_to_lba(&tf);
+ *max_sectors = ata_tf_to_lba(&tf) + 1;
if (dev->horkage & ATA_HORKAGE_HPA_SIZE)
(*max_sectors)--;
return 0;
diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h
index a69f663..5e8d035 100644
--- a/drivers/ata/libata.h
+++ b/drivers/ata/libata.h
@@ -61,6 +61,8 @@
extern int libata_noacpi;
extern int libata_allow_tpm;
extern void ata_force_cbl(struct ata_port *ap);
+extern u64 ata_tf_to_lba(const struct ata_taskfile *tf);
+extern u64 ata_tf_to_lba48(const struct ata_taskfile *tf);
extern struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev);
extern int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev,
u64 block, u32 n_block, unsigned int tf_flags,