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.
From 3b93e891e0e37afefc1f1eca461dcfc3ded879f9 Mon Sep 17 00:00:00 2001
From: Vasily Khoruzhick <anarsoul@xxxxxxxxx>
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@xxxxxxxxx>
---
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
Attachment:
signature.asc
Description: This is a digitally signed message part.
