linux-kernel - [PATCH 4.4 80/97] ALSA: hda - New VIA controller suppor no-snoop path

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Message-Id: <20180422135309.591024273@linuxfoundation.org>
Date:   Sun, 22 Apr 2018 15:53:58 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, David Wang <davidwang@...oxin.com>,
        Takashi Iwai <tiwai@...e.de>
Subject: [PATCH 4.4 80/97] ALSA: hda - New VIA controller suppor no-snoop path

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: David Wang <davidwang@...oxin.com>

commit af52f9982e410edac21ca4b49563053ffc9da1eb upstream.

This patch is used to tell kernel that new VIA HDAC controller also
support no-snoop path.

[ minor coding style fix by tiwai ]

Signed-off-by: David Wang <davidwang@...oxin.com>
Cc: <stable@...r.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@...e.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 sound/pci/hda/hda_intel.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -1549,7 +1549,8 @@ static void azx_check_snoop_available(st
 		 */
 		u8 val;
 		pci_read_config_byte(chip->pci, 0x42, &val);
-		if (!(val & 0x80) && chip->pci->revision == 0x30)
+		if (!(val & 0x80) && (chip->pci->revision == 0x30 ||
+				      chip->pci->revision == 0x20))
 			snoop = false;
 	}