From 4a9c7b3359889399aacb94019bbdfc9f38d4cff7 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Mon, 27 Oct 2008 19:59:23 +0900 Subject: [PATCH] libata: fix device iteration bugs There were several places where only enabled devices should be iterated over but device enabledness wasn't checked. * IDENTIFY data 40 wire check in cable_is_40wire() * xfer_mode/ncq_enabled saving in ata_scsi_error() * DUBIOUS_XFER handling in ata_set_mode() While at it, reformat comments in cable_is_40wire(). Signed-off-by: Tejun Heo Signed-off-by: Jeff Garzik --- drivers/ata/libata-core.c | 34 +++++++++++++++++++--------------- drivers/ata/libata-eh.c | 9 +++++++++ 2 files changed, 28 insertions(+), 15 deletions(-) diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index 8cb0b360bfd..97df4807a08 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -4156,29 +4156,33 @@ static int cable_is_40wire(struct ata_port *ap) struct ata_link *link; struct ata_device *dev; - /* If the controller thinks we are 40 wire, we are */ + /* If the controller thinks we are 40 wire, we are. */ if (ap->cbl == ATA_CBL_PATA40) return 1; - /* If the controller thinks we are 80 wire, we are */ + + /* If the controller thinks we are 80 wire, we are. */ if (ap->cbl == ATA_CBL_PATA80 || ap->cbl == ATA_CBL_SATA) return 0; - /* If the system is known to be 40 wire short cable (eg laptop), - then we allow 80 wire modes even if the drive isn't sure */ + + /* If the system is known to be 40 wire short cable (eg + * laptop), then we allow 80 wire modes even if the drive + * isn't sure. + */ if (ap->cbl == ATA_CBL_PATA40_SHORT) return 0; - /* If the controller doesn't know we scan - - - Note: We look for all 40 wire detects at this point. - Any 80 wire detect is taken to be 80 wire cable - because - - In many setups only the one drive (slave if present) - will give a valid detect - - If you have a non detect capable drive you don't - want it to colour the choice - */ + + /* If the controller doesn't know, we scan. + * + * Note: We look for all 40 wire detects at this point. Any + * 80 wire detect is taken to be 80 wire cable because + * - in many setups only the one drive (slave if present) will + * give a valid detect + * - if you have a non detect capable drive you don't want it + * to colour the choice + */ ata_port_for_each_link(link, ap) { ata_link_for_each_dev(dev, link) { - if (!ata_is_40wire(dev)) + if (ata_dev_enabled(dev) && !ata_is_40wire(dev)) return 0; } } diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c index 5d687d7cffa..a6a3b1554c4 100644 --- a/drivers/ata/libata-eh.c +++ b/drivers/ata/libata-eh.c @@ -603,6 +603,9 @@ void ata_scsi_error(struct Scsi_Host *host) ata_link_for_each_dev(dev, link) { int devno = dev->devno; + if (!ata_dev_enabled(dev)) + continue; + ehc->saved_xfer_mode[devno] = dev->xfer_mode; if (ata_ncq_enabled(dev)) ehc->saved_ncq_enabled |= 1 << devno; @@ -2787,6 +2790,9 @@ int ata_set_mode(struct ata_link *link, struct ata_device **r_failed_dev) /* if data transfer is verified, clear DUBIOUS_XFER on ering top */ ata_link_for_each_dev(dev, link) { + if (!ata_dev_enabled(dev)) + continue; + if (!(dev->flags & ATA_DFLAG_DUBIOUS_XFER)) { struct ata_ering_entry *ent; @@ -2808,6 +2814,9 @@ int ata_set_mode(struct ata_link *link, struct ata_device **r_failed_dev) u8 saved_xfer_mode = ehc->saved_xfer_mode[dev->devno]; u8 saved_ncq = !!(ehc->saved_ncq_enabled & (1 << dev->devno)); + if (!ata_dev_enabled(dev)) + continue; + if (dev->xfer_mode != saved_xfer_mode || ata_ncq_enabled(dev) != saved_ncq) dev->flags |= ATA_DFLAG_DUBIOUS_XFER; -- 2.41.0