From: Bartlomiej Zolnierkiewicz Date: Thu, 3 Dec 2009 19:32:08 +0000 (+0100) Subject: pata_efar: fix wrong PIO timings being programmed X-Git-Tag: firefly_0821_release~9833^2~3960^2~23 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=f79ff92649efd5ef17f5267fe6f599c64e74e050;p=firefly-linux-kernel-4.4.55.git pata_efar: fix wrong PIO timings being programmed * do not clear PIO timings for master when programming slave * do not clear PIO timings for device on the other port when programming slave device Both changes should be safe as this is how we have been doing things in IDE slc90e66 host driver for years. Signed-off-by: Bartlomiej Zolnierkiewicz Signed-off-by: Jeff Garzik --- diff --git a/drivers/ata/pata_efar.c b/drivers/ata/pata_efar.c index 2a6412f5d117..540c36426303 100644 --- a/drivers/ata/pata_efar.c +++ b/drivers/ata/pata_efar.c @@ -2,6 +2,7 @@ * pata_efar.c - EFAR PIIX clone controller driver * * (C) 2005 Red Hat + * (C) 2009 Bartlomiej Zolnierkiewicz * * Some parts based on ata_piix.c by Jeff Garzik and others. * @@ -118,12 +119,12 @@ static void efar_set_piomode (struct ata_port *ap, struct ata_device *adev) int shift = 4 * ap->port_no; u8 slave_data; - idetm_data &= 0xCC0F; + idetm_data &= 0xFF0F; idetm_data |= (control << 4); /* Slave timing in separate register */ pci_read_config_byte(dev, 0x44, &slave_data); - slave_data &= 0x0F << shift; + slave_data &= ap->port_no ? 0x0F : 0xF0; slave_data |= ((timings[pio][0] << 2) | timings[pio][1]) << shift; pci_write_config_byte(dev, 0x44, slave_data); }