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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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drm/nouveau/bios: fix shadowing of ACPI ROMs larger than 64KiB
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
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@ -185,23 +185,22 @@ static void
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nouveau_bios_shadow_acpi(struct nouveau_bios *bios)
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{
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struct pci_dev *pdev = nv_device(bios)->pdev;
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int cnt = 65536 / 4096;
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int ret;
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int ret, cnt, i;
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u8 data[3];
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if (!nouveau_acpi_rom_supported(pdev))
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return;
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bios->data = kmalloc(65536, GFP_KERNEL);
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bios->size = 0;
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if (!bios->data)
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return;
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if (nouveau_acpi_get_bios_chunk(data, 0, 3) == 3)
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bios->size = data[2] * 512;
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while (cnt--) {
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ret = nouveau_acpi_get_bios_chunk(bios->data, bios->size, 4096);
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if (ret != 4096)
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return;
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bios->size += 4096;
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bios->data = kmalloc(bios->size, GFP_KERNEL);
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for (i = 0; bios->data && i < bios->size; i += cnt) {
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cnt = min((bios->size - i), (u32)4096);
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ret = nouveau_acpi_get_bios_chunk(bios->data, i, cnt);
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if (ret != cnt)
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break;
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}
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}
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