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From: | Almudena Garcia |
Subject: | Re: [PATCH 5/5 gnumach] linux: Skip probing IDE when 255 phys heads detected |
Date: | Wed, 1 Feb 2023 12:13:03 +0100 |
This allows qemu -M q35 to boot without 30 second timeout
failing on hd0, when disk is actually attached via ahci.
I very much doubt a disk exists with 255 physical heads.
---
linux/src/drivers/block/ide.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/linux/src/drivers/block/ide.c b/linux/src/drivers/block/ide.c
index 2d0fc77e..41d4cef8 100644
--- a/linux/src/drivers/block/ide.c
+++ b/linux/src/drivers/block/ide.c
@@ -2964,7 +2964,7 @@ static void probe_cmos_for_drives (ide_hwif_t *hwif)
unsigned char head = *(BIOS+2);
unsigned char sect = *(BIOS+14);
unsigned char ctl = *(BIOS+8);
- if (cyl > 0 && head > 0 && sect > 0 && sect < 64) {
+ if (cyl > 0 && head > 0 && sect > 0 && sect < 64 && head != 0xff) {
drive->cyl = drive->bios_cyl = cyl;
drive->head = drive->bios_head = head;
drive->sect = drive->bios_sect = sect;
--
2.34.1
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