--- include/linux/ata.h

+++ include/linux/ata.h

@@ -1000,8 +1000,8 @@ static inline int ata_ok(u8 status)

static inline int lba_28_ok(u64 block, u32 n_block)

{

- /* check the ending block number */

- return ((block + n_block) < ((u64)1 << 28)) && (n_block <= 256);

+ /* check the ending block number: must be LESS THAN 0x0fffffff */

+ return ((block + n_block) < ((1 << 28) - 1)) && (n_block <= 256);

}

static inline int lba_48_ok(u64 block, u32 n_block)