Avoid freeze on Atari TT / MegaSTe boot with continuous messages of:
unexpected interrupt from 112
Which was due to VBL interrupt being enabled in SCU sys mask, but
there being no handler for that any more.
v2: commit description checkpatch fixes
Fixes: 1fa0b29f3a43 ("fbdev: Kill Atari vblank cursor blinking")
Tested-by: Christian Zietz <czietz@xxxxxxx>
(Bug and fix were first verified on real Atari TT HW by Christian,
this patch later on in Hatari emulator.)
Reported-by: Nicolas Pomarède <npomarede@xxxxxxxxxxxx>
Closes: https://listengine.tuxfamily.org/lists.tuxfamily.org/hatari-devel/2024/06/msg00016.html
Reviewed-by: Michael Schmitz <schmitzmic@xxxxxxxxx>
Link: https://lore.kernel.org/all/9aa793d7-82ed-4fbd-bce5-60810d8a9119@xxxxxxxxxxxxxx
Signed-off-by: Eero Tamminen <oak@xxxxxxxxxxxxxx>
---
arch/m68k/atari/ataints.c | 6 +-----
1 file changed, 1 insertion(+), 5 deletions(-)
diff --git a/arch/m68k/atari/ataints.c b/arch/m68k/atari/ataints.c
index 230203ffb..fa189eeb7 100644
--- a/arch/m68k/atari/ataints.c
+++ b/arch/m68k/atari/ataints.c
@@ -303,11 +303,7 @@ void __init atari_init_IRQ(void)
if (ATARIHW_PRESENT(SCU)) {
/* init the SCU if present */
- tt_scu.sys_mask = 0x10; /* enable VBL (for the cursor) and
- * disable HSYNC interrupts (who
- * needs them?) MFP and SCC are
- * enabled in VME mask
- */
+ tt_scu.sys_mask = 0x0; /* disable all interrupts */
tt_scu.vme_mask = 0x60; /* enable MFP and SCC ints */
} else {
/* If no SCU and no Hades, the HSYNC interrupt needs to be
--
2.39.2
