1 files changed, 12 insertions, 0 deletions

diff --git a/include/linux/ata.h b/include/linux/ata.h
index 29fa99bde2be..8e88efc565be 100644
--- a/include/linux/ata.h
+++ b/include/linux/ata.h
@@ -313,4 +313,16 @@ static inline int ata_ok(u8 status)
                         == ATA_DRDY);
 }
 
+static inline int lba_28_ok(u64 block, u32 n_block)
+{
+        /* check the ending block number */
+        return ((block + n_block - 1) < ((u64)1 << 28)) && (n_block <= 256);
+}
+
+static inline int lba_48_ok(u64 block, u32 n_block)
+{
+        /* check the ending block number */
+        return ((block + n_block - 1) < ((u64)1 << 48)) && (n_block <= 65536);
+}
+
 #endif /* __LINUX_ATA_H__ */