From 2fd3c5c617937cde5aafa48db4f4056e1f705987 Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Tue, 21 Jan 2020 16:06:42 +0300 Subject: ide: make drive->dn read only The IDE core always sets ->dn correctly so changing it is never required. Setting it to a different value than assigned by IDE core is very likely to result in data corruption (due to wrong transfer timings being set on the controller etc.) Signed-off-by: Dan Carpenter Acked-by: Bartlomiej Zolnierkiewicz Tested-by: Bartlomiej Zolnierkiewicz Signed-off-by: David S. Miller --- include/linux/ide.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'include/linux/ide.h') diff --git a/include/linux/ide.h b/include/linux/ide.h index 46b771d6999e..25046ffa5a4a 100644 --- a/include/linux/ide.h +++ b/include/linux/ide.h @@ -943,6 +943,10 @@ ide_devset_get(_name, _field); \ ide_devset_set(_name, _field); \ IDE_DEVSET(_name, DS_SYNC, get_##_name, set_##_name) +#define ide_devset_ro_field(_name, _field) \ +ide_devset_get(_name, _field); \ +IDE_DEVSET(_name, 0, get_##_name, NULL) + #define ide_devset_rw_flag(_name, _field) \ ide_devset_get_flag(_name, _field); \ ide_devset_set_flag(_name, _field); \ -- cgit