From 8a4e0ff10f0ab5a7a9284f385de4346243c8f469 Mon Sep 17 00:00:00 2001
From: Mathieu Maret <mathieu.maret@gmail.com>
Date: Mon, 20 Nov 2023 23:11:12 +0100
Subject: [PATCH] Fix ata device detection

After grub loading sector and LBA could have been altered
---
 drivers/ata.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/ata.c b/drivers/ata.c
index 8ac576f..5476e91 100644
--- a/drivers/ata.c
+++ b/drivers/ata.c
@@ -418,6 +418,10 @@ int ATADetectDevice(struct ata_device *dev)
 	struct ata_controller *ctl = dev->ctl;
 	outb(ctl->base + ATA_PIO_DRIVE,
 	     ATA_PIO_DRIVE_IBM | (dev->isSlave ? ATA_PIO_DRIVE_SLAVE : ATA_PIO_DRIVE_MASTER));
+	outb(ctl->base + ATA_PIO_SEC_COUNT, 0);
+	outb(ctl->base + ATA_PIO_LBALO, 0);
+	outb(ctl->base + ATA_PIO_LBAMID, 0);
+	outb(ctl->base + ATA_PIO_LBAHI, 0);
 	unsigned st = inb(ctl->base + ATA_PIO_STATUS);
 	if (st & ATA_PIO_STATUS_DRIVE_BUSY)
 		goto no_disk;