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| author | Tejun Heo <htejun@gmail.com> | 2006-12-03 21:34:13 +0900 |
|---|---|---|
| committer | Jeff Garzik <jeff@garzik.org> | 2006-12-03 07:58:10 -0500 |
| commit | 800b399669ad495ad4361d134df87401ae36f44f (patch) | |
| tree | 19e29f655836cd4808c668d736a83df552b7d8dd /drivers/ata | |
| parent | 3ac551a6a63dcbc707348772a27bd7090b081524 (diff) | |
| download | kernel_samsung_espresso10-800b399669ad495ad4361d134df87401ae36f44f.zip kernel_samsung_espresso10-800b399669ad495ad4361d134df87401ae36f44f.tar.gz kernel_samsung_espresso10-800b399669ad495ad4361d134df87401ae36f44f.tar.bz2 | |
[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 <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/ata')
| -rw-r--r-- | drivers/ata/ata_piix.c | 5 | ||||
| -rw-r--r-- | drivers/ata/libata-core.c | 8 | ||||
| -rw-r--r-- | drivers/ata/libata-eh.c | 3 | ||||
| -rw-r--r-- | drivers/ata/libata.h | 2 |
4 files changed, 4 insertions, 14 deletions
diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c index 788a269..a2d84f7 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 8832763..f8ec389 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 2aad7b7..76a85df 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 1ff3f59..107b2b5 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; |