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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Daniel Axtens <dja@axtens.net>
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Date: Mon, 6 Feb 2023 10:03:21 -0500
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Subject: [PATCH] ieee1275: drop len -= 1 quirk in heap_init
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This was apparently 'required by some firmware': commit dc9468500919
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("2007-02-12 Hollis Blanchard <hollis@penguinppc.org>").
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It's not clear what firmware that was, and what platform from 14 years ago
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which exhibited the bug then is still both in use and buggy now.
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It doesn't cause issues on qemu (mac99 or pseries) or under PFW for Power8.
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I don't have access to old Mac hardware, but if anyone feels especially
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strongly we can put it under some feature flag. I really want to disable
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it under pseries because it will mess with region merging.
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Signed-off-by: Daniel Axtens <dja@axtens.net>
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Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
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(cherry picked from commit fc639d430297321ee4f77c5d2d698f698cec0dc7)
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---
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grub-core/kern/ieee1275/init.c | 1 -
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1 file changed, 1 deletion(-)
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diff --git a/grub-core/kern/ieee1275/init.c b/grub-core/kern/ieee1275/init.c
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index 8ae405bc79..c8d551759d 100644
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--- a/grub-core/kern/ieee1275/init.c
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+++ b/grub-core/kern/ieee1275/init.c
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@@ -168,7 +168,6 @@ heap_init (grub_uint64_t addr, grub_uint64_t len, grub_memory_type_t type,
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addr = 0x180000;
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}
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}
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- len -= 1; /* Required for some firmware. */
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/* Never exceed HEAP_MAX_SIZE */
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if (*total + len > HEAP_MAX_SIZE)
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