diff --git a/[refs] b/[refs]
index 5e732562d20b..d3014afb03cf 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: f38344b0a0898d2a8c13581ee61007719e16e1d7
+refs/heads/master: d3dd7107f4d843d0f01d0f77d49a7c5449130577
diff --git a/trunk/drivers/ide/ide-cd.c b/trunk/drivers/ide/ide-cd.c
index 0bfeb0c79d6e..690475b834de 100644
--- a/trunk/drivers/ide/ide-cd.c
+++ b/trunk/drivers/ide/ide-cd.c
@@ -194,6 +194,14 @@ static void cdrom_analyze_sense_data(ide_drive_t *drive,
 			bio_sectors = max(bio_sectors(failed_command->bio), 4U);
 			sector &= ~(bio_sectors - 1);
 
+			/*
+			 * The SCSI specification allows for the value
+			 * returned by READ CAPACITY to be up to 75 2K
+			 * sectors past the last readable block.
+			 * Therefore, if we hit a medium error within the
+			 * last 75 2K sectors, we decrease the saved size
+			 * value.
+			 */
 			if (sector < get_capacity(info->disk) &&
 			    drive->probed_capacity - sector < 4 * 75)
 				set_capacity(info->disk, sector);