From 9b49bdf3376f3c6e9b38ccfd509db19d006c5d2b Mon Sep 17 00:00:00 2001 From: Aaron Lu Date: Mon, 3 Dec 2012 11:35:02 +0800 Subject: [PATCH] libata: set dma_mode to 0xff in reset commit 5416912af75de9cba5d1c75b99a7888b0bbbd2fb upstream. ata_device->dma_mode's initial value is zero, which is not a valid dma mode, but ata_dma_enabled will return true for this value. This patch sets dma_mode to 0xff in reset function, so that ata_dma_enabled will not return true for this case, or it will cause problem for pata_acpi. The corrsponding bugzilla page is at: https://bugzilla.kernel.org/show_bug.cgi?id=49151 Reported-by: Phillip Wood Signed-off-by: Aaron Lu Tested-by: Szymon Janc Tested-by: Dutra Julio Acked-by: Alan Cox Signed-off-by: Jeff Garzik Signed-off-by: Greg Kroah-Hartman --- drivers/ata/libata-core.c | 1 + drivers/ata/libata-eh.c | 1 + 2 files changed, 2 insertions(+) diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index 600ede0c0720..5a72e36a3147 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -2543,6 +2543,7 @@ int ata_bus_probe(struct ata_port *ap) * bus as we may be talking too fast. */ dev->pio_mode = XFER_PIO_0; + dev->dma_mode = 0xff; /* If the controller has a pio mode setup function * then use it to set the chipset to rights. Don't diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c index 311c92d1db25..1cbb0043638d 100644 --- a/drivers/ata/libata-eh.c +++ b/drivers/ata/libata-eh.c @@ -2602,6 +2602,7 @@ int ata_eh_reset(struct ata_link *link, int classify, * bus as we may be talking too fast. */ dev->pio_mode = XFER_PIO_0; + dev->dma_mode = 0xff; /* If the controller has a pio mode setup function * then use it to set the chipset to rights. Don't -- 2.34.1