From 800b399669ad495ad4361d134df87401ae36f44f Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Sun, 3 Dec 2006 21:34:13 +0900 Subject: [PATCH] [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/ata_piix.c | 5 ++--- drivers/ata/libata-core.c | 8 ++------ drivers/ata/libata-eh.c | 3 --- drivers/ata/libata.h | 2 -- include/linux/libata.h | 4 +--- 5 files changed, 5 insertions(+), 17 deletions(-) diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c index 788a269206e6..a2d84f7cf2bc 100644 --- a/drivers/ata/ata_piix.c +++ b/drivers/ata/ata_piix.c @@ -105,9 +105,8 @@ enum { PIIX_FLAG_AHCI = (1 << 27), /* AHCI possible */ PIIX_FLAG_CHECKINTR = (1 << 28), /* make sure PCI INTx enabled */ - PIIX_PATA_FLAGS = ATA_FLAG_SLAVE_POSS | ATA_FLAG_DETECT_POLLING, - PIIX_SATA_FLAGS = ATA_FLAG_SATA | PIIX_FLAG_CHECKINTR | - ATA_FLAG_DETECT_POLLING, + PIIX_PATA_FLAGS = ATA_FLAG_SLAVE_POSS, + PIIX_SATA_FLAGS = ATA_FLAG_SATA | PIIX_FLAG_CHECKINTR, /* combined mode. if set, PATA is channel 0. * if clear, PATA is channel 1. 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; diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c index 2aad7b79d6dd..76a85dfb7307 100644 --- a/drivers/ata/libata-eh.c +++ b/drivers/ata/libata-eh.c @@ -1692,9 +1692,6 @@ static int ata_eh_revalidate_and_attach(struct ata_port *ap, ata_class_enabled(ehc->classes[dev->devno])) { dev->class = ehc->classes[dev->devno]; - if (ap->flags & ATA_FLAG_DETECT_POLLING) - readid_flags |= ATA_READID_DETECT; - rc = ata_dev_read_id(dev, &dev->class, readid_flags, dev->id); if (rc == 0) { diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h index 1ff3f59504c9..107b2b565229 100644 --- a/drivers/ata/libata.h +++ b/drivers/ata/libata.h @@ -42,8 +42,6 @@ struct ata_scsi_args { enum { /* flags for ata_dev_read_id() */ ATA_READID_POSTRESET = (1 << 0), /* reading ID after reset */ - ATA_READID_DETECT = (1 << 1), /* perform presence detection - * using polling IDENTIFY */ }; extern struct workqueue_struct *ata_aux_wq; diff --git a/include/linux/libata.h b/include/linux/libata.h index 8b57b6a806cc..202283b5df96 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -176,9 +176,7 @@ enum { ATA_FLAG_SKIP_D2H_BSY = (1 << 12), /* can't wait for the first D2H * Register FIS clearing BSY */ ATA_FLAG_DEBUGMSG = (1 << 13), - ATA_FLAG_DETECT_POLLING = (1 << 14), /* detect device presence by - * polling IDENTIFY */ - ATA_FLAG_SETXFER_POLLING= (1 << 15), /* use polling for SETXFER */ + ATA_FLAG_SETXFER_POLLING= (1 << 14), /* use polling for SETXFER */ /* The following flag belongs to ap->pflags but is kept in * ap->flags because it's referenced in many LLDs and will be -- 2.34.1