[PATCH v2] Enable DMA for Ricoh reader on Lenovo laptops

[Vasily Khoruzhick <anarsoul@gmail.com>]

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В сообщении от 1 февраля 2010 11:10:53 автор Vasily Khoruzhick написал:
> Ricoh SD/MMC card reader on Lenovo laptops (3000 n100, 3000 n200) doesn't
> announce DMA capability, however it supports DMA. Without this patch audio
> clicks and cursor is jerky during card access.

It seems that Ricoh R5C822 card reader on mentioned laptops need one more 
quirk. Here's updated patch.

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From 3b93e891e0e37afefc1f1eca461dcfc3ded879f9 Mon Sep 17 00:00:00 2001
From: Vasily Khoruzhick <anarsoul@gmail.com>
Date: Tue, 2 Feb 2010 18:12:54 +0200
Subject: [PATCH v2] Enable DMA for Ricoh reader on Lenovo laptops

Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com>
---
 drivers/mmc/host/sdhci-pci.c |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/drivers/mmc/host/sdhci-pci.c b/drivers/mmc/host/sdhci-pci.c
index 5c3a176..d49e5ff 100644
--- a/drivers/mmc/host/sdhci-pci.c
+++ b/drivers/mmc/host/sdhci-pci.c
@@ -80,13 +80,17 @@ struct sdhci_pci_chip {
 
 static int ricoh_probe(struct sdhci_pci_chip *chip)
 {
-	if (chip->pdev->subsystem_vendor == PCI_VENDOR_ID_IBM)
+	if (chip->pdev->subsystem_vendor == PCI_VENDOR_ID_IBM ||
+	    chip->pdev->subsystem_vendor == PCI_VENDOR_ID_LENOVO)
 		chip->quirks |= SDHCI_QUIRK_CLOCK_BEFORE_RESET;
 
 	if (chip->pdev->subsystem_vendor == PCI_VENDOR_ID_SAMSUNG ||
 	    chip->pdev->subsystem_vendor == PCI_VENDOR_ID_SONY)
 		chip->quirks |= SDHCI_QUIRK_NO_CARD_NO_RESET;
 
+	if (chip->pdev->subsystem_vendor == PCI_VENDOR_ID_LENOVO)
+		chip->quirks |= SDHCI_QUIRK_FORCE_DMA;
+
 	return 0;
 }
 
-- 
1.6.6.1


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