From: Alan Cox <alan@lxorguk.ukuu.org.uk>
Date: Mon, 27 Jun 2005 22:24:25 +0000 (-0700)
Subject: [PATCH] ide: IDE timing violation on reset
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=68ad9910b0525d0194f9c316c7cb14adbf8e0c0c;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

[PATCH] ide: IDE timing violation on reset

Pretty much theoretical for non MMIO thankfully.  We _must_ use OUTBSYNC for
commands or they may be posted and thus ruin the 400nS required delay.

Signed-off-by: Alan Cox <alan@redhat.com>
Acked-by: Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/drivers/ide/ide-iops.c b/drivers/ide/ide-iops.c
index 53024942a7eb..b443b04a4c5a 100644
--- a/drivers/ide/ide-iops.c
+++ b/drivers/ide/ide-iops.c
@@ -1181,7 +1181,8 @@ static ide_startstop_t do_reset1 (ide_drive_t *drive, int do_not_try_atapi)
 		pre_reset(drive);
 		SELECT_DRIVE(drive);
 		udelay (20);
-		hwif->OUTB(WIN_SRST, IDE_COMMAND_REG);
+		hwif->OUTBSYNC(drive, WIN_SRST, IDE_COMMAND_REG);
+		ndelay(400);
 		hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE;
 		hwgroup->polling = 1;
 		__ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL);