libata: Don't trust current capacity values in identify words 57-58
[sfrench/cifs-2.6.git] / drivers / ata / libata-core.c
index 5e324cea30195d0ce5cb9c48c8e2af592e6760cc..060bcd601f5758d63ae95e017fe7f501c8dd0607 100644 (file)
@@ -1322,14 +1322,16 @@ static u64 ata_id_n_sectors(const u16 *id)
 {
        if (ata_id_has_lba(id)) {
                if (ata_id_has_lba48(id))
-                       return ata_id_u64(id, 100);
+                       return ata_id_u64(id, ATA_ID_LBA_CAPACITY_2);
                else
-                       return ata_id_u32(id, 60);
+                       return ata_id_u32(id, ATA_ID_LBA_CAPACITY);
        } else {
                if (ata_id_current_chs_valid(id))
-                       return ata_id_u32(id, 57);
+                       return id[ATA_ID_CUR_CYLS] * id[ATA_ID_CUR_HEADS] *
+                              id[ATA_ID_CUR_SECTORS];
                else
-                       return id[1] * id[3] * id[6];
+                       return id[ATA_ID_CYLS] * id[ATA_ID_HEADS] *
+                              id[ATA_ID_SECTORS];
        }
 }