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m68k: atari: Fix TT bootup freeze / unexpected (SCU) interrupt messages
[ Upstream commitf70065a9fd
] 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. (Bug and fix were first verified on real Atari TT HW by Christian, this patch later on in Hatari emulator.) Fixes:1fa0b29f3a
("fbdev: Kill Atari vblank cursor blinking") Reported-by: Nicolas Pomarède <npomarede@corp.free.fr> Closes: https://listengine.tuxfamily.org/lists.tuxfamily.org/hatari-devel/2024/06/msg00016.html Closes: https://lore.kernel.org/all/9aa793d7-82ed-4fbd-bce5-60810d8a9119@helsinkinet.fi Tested-by: Christian Zietz <czietz@gmx.net> Signed-off-by: Eero Tamminen <oak@helsinkinet.fi> Reviewed-by: Michael Schmitz <schmitzmic@gmail.com> Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org> Link: https://lore.kernel.org/20240624144901.5236-1-oak@helsinkinet.fi Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
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1 changed files with 1 additions and 5 deletions
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@ -302,11 +302,7 @@ void __init atari_init_IRQ(void)
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if (ATARIHW_PRESENT(SCU)) {
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/* init the SCU if present */
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tt_scu.sys_mask = 0x10; /* enable VBL (for the cursor) and
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* disable HSYNC interrupts (who
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* needs them?) MFP and SCC are
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* enabled in VME mask
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*/
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tt_scu.sys_mask = 0x0; /* disable all interrupts */
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tt_scu.vme_mask = 0x60; /* enable MFP and SCC ints */
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} else {
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/* If no SCU and no Hades, the HSYNC interrupt needs to be
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