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m68k: amiga: Turn off Warp1260 interrupts during boot

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commit 1d8491d3e7 upstream.

On an Amiga 1200 equipped with a Warp1260 accelerator, an interrupt
storm coming from the accelerator board causes the machine to crash in
local_irq_enable() or auto_irq_enable().  Disabling interrupts for the
Warp1260 in amiga_parse_bootinfo() fixes the problem.

Link: https://lore.kernel.org/r/ZkjwzVwYeQtyAPrL@amaterasu.local
Cc: stable <stable@kernel.org>
Signed-off-by: Paolo Pisati <p.pisati@gmail.com>
Reviewed-by: Michael Schmitz <schmitzmic@gmail.com>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Link: https://lore.kernel.org/r/20240601153254.186225-1-p.pisati@gmail.com
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Paolo Pisati 2024-06-01 17:32:54 +02:00 committed by Greg Kroah-Hartman
parent 8ca170c39e
commit 550cc6a4dc
2 changed files with 12 additions and 0 deletions
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9
arch/m68k/amiga/config.c
View File

@ -180,6 +180,15 @@ int __init amiga_parse_bootinfo(const struct bi_record *record)
dev->slotsize = be16_to_cpu(cd->cd_SlotSize);
dev->boardaddr = be32_to_cpu(cd->cd_BoardAddr);
dev->boardsize = be32_to_cpu(cd->cd_BoardSize);
/* CS-LAB Warp 1260 workaround */
if (be16_to_cpu(dev->rom.er_Manufacturer) == ZORRO_MANUF(ZORRO_PROD_CSLAB_WARP_1260) &&
dev->rom.er_Product == ZORRO_PROD(ZORRO_PROD_CSLAB_WARP_1260)) {
/* turn off all interrupts */
pr_info("Warp 1260 card detected: applying interrupt storm workaround\n");
*(uint32_t *)(dev->boardaddr + 0x1000) = 0xfff;
}
} else
pr_warn("amiga_parse_bootinfo: too many AutoConfig devices\n");
#endif /* CONFIG_ZORRO */

3
include/uapi/linux/zorro_ids.h
View File

@ -449,6 +449,9 @@
#define ZORRO_PROD_VMC_ISDN_BLASTER_Z2 ZORRO_ID(VMC, 0x01, 0)
#define ZORRO_PROD_VMC_HYPERCOM_4 ZORRO_ID(VMC, 0x02, 0)
#define ZORRO_MANUF_CSLAB 0x1400
#define ZORRO_PROD_CSLAB_WARP_1260 ZORRO_ID(CSLAB, 0x65, 0)
#define ZORRO_MANUF_INFORMATION 0x157C
#define ZORRO_PROD_INFORMATION_ISDN_ENGINE_I ZORRO_ID(INFORMATION, 0x64, 0)