Merge tag 'metag-fixes-v4.0-2' of git://git.kernel.org/pub/scm/linux/kernel/git/jhoga...

[karo-tx-linux.git] / drivers / ide / ide-cd_ioctl.c

diff --git a/drivers/ide/ide-cd_ioctl.c b/drivers/ide/ide-cd_ioctl.c
index 2a6bc50e8a41e8918da5ad8aca49686d68da318c..02caa7dd51c83f99e34e05de972f67020945a2d6 100644 (file)
--- 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)
 {