From 800b399669ad495ad4361d134df87401ae36f44f Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Sun, 3 Dec 2006 21:34:13 +0900 Subject: [PATCH] libata: always use polling IDENTIFY libata switched to IRQ-driven IDENTIFY when IRQ-driven PIO was introduced. This has caused a lot of problems including device misdetection and phantom device. ATA_FLAG_DETECT_POLLING was added recently to selectively use polling IDENTIFY on problemetic drivers but many controllers and devices are affected by this problem and trying to adding ATA_FLAG_DETECT_POLLING for each such case is diffcult and not very rewarding. This patch makes libata always use polling IDENTIFY. This is consistent with libata's original behavior and drivers/ide's behavior. Signed-off-by: Tejun Heo Signed-off-by: Jeff Garzik --- drivers/ata/libata-core.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-) (limited to 'drivers/ata/libata-core.c') diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index 883276388207..f8ec3896b793 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -1473,16 +1473,12 @@ int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class, } tf.protocol = ATA_PROT_PIO; - - /* presence detection using polling IDENTIFY? */ - if (flags & ATA_READID_DETECT) - tf.flags |= ATA_TFLAG_POLLING; + tf.flags |= ATA_TFLAG_POLLING; /* for polling presence detection */ err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE, id, sizeof(id[0]) * ATA_ID_WORDS); if (err_mask) { - if ((flags & ATA_READID_DETECT) && - (err_mask & AC_ERR_NODEV_HINT)) { + if (err_mask & AC_ERR_NODEV_HINT) { DPRINTK("ata%u.%d: NODEV after polling detection\n", ap->id, dev->devno); return -ENOENT; -- cgit v1.2.3