From: Alan Cox <alan@lxorguk.ukuu.org.uk>
Date: Fri, 23 Mar 2007 18:57:23 +0000 (+0000)
Subject: pata_pdc202xx_old: LBA48 bug
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=5e5188108bcf9ab2e6f87b4b54924354040b0aa7;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

pata_pdc202xx_old: LBA48 bug

In LBA48 mode we have to help the controller to get anything to work. The
chip provides a register giving word counts meant for ATAPI use which we
can use. However we need to load the count in words not bytes..

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---

diff --git a/drivers/ata/pata_pdc202xx_old.c b/drivers/ata/pata_pdc202xx_old.c
index acdc52cbe38a..0a1493398913 100644
--- a/drivers/ata/pata_pdc202xx_old.c
+++ b/drivers/ata/pata_pdc202xx_old.c
@@ -195,7 +195,7 @@ static void pdc2026x_bmdma_start(struct ata_queued_cmd *qc)
 	/* Cases the state machine will not complete correctly without help */
 	if ((tf->flags & ATA_TFLAG_LBA48) ||  tf->protocol == ATA_PROT_ATAPI_DMA)
 	{
-		len = qc->nbytes;
+		len = qc->nbytes / 2;
 
 		if (tf->flags & ATA_TFLAG_WRITE)
 			len |= 0x06000000;