X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=drivers%2Fide%2Fide-cd_ioctl.c;h=02caa7dd51c83f99e34e05de972f67020945a2d6;hb=a385ec4f11bdcf81af094c03e2444ee9b7fad2e5;hp=2a6bc50e8a41e8918da5ad8aca49686d68da318c;hpb=96fd2d57b8252e16dfacf8941f7a74a6119197f5;p=firefly-linux-kernel-4.4.55.git

diff --git a/drivers/ide/ide-cd_ioctl.c b/drivers/ide/ide-cd_ioctl.c
index 2a6bc50e8a41..02caa7dd51c8 100644
--- a/drivers/ide/ide-cd_ioctl.c
+++ b/drivers/ide/ide-cd_ioctl.c
@@ -79,6 +79,12 @@ int ide_cdrom_drive_status(struct cdrom_device_info *cdi, int slot_nr)
 	return CDS_DRIVE_NOT_READY;
 }
 
+/*
+ * ide-cd always generates media changed event if media is missing, which
+ * makes it impossible to use for proper event reporting, so disk->events
+ * is cleared to 0 and the following function is used only to trigger
+ * revalidation and never propagated to userland.
+ */
 unsigned int ide_cdrom_check_events_real(struct cdrom_device_info *cdi,
 					 unsigned int clearing, int slot_nr)
 {