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* libata-pmp-prep: implement qc_defer helpersTejun Heo2007-10-12
| | | | | | | | | | | | | | Implement ap->nr_active_links (the number of links with active qcs), ap->excl_link (pointer to link which can be used by ->qc_defer and is cleared when a qc with ATA_QCFLAG_CLEAR_EXCL completes), and ata_link_active(). These can be used by ->qc_defer() to implement proper command exclusion. This set of helpers seem enough for both sil24 (ATAPI exclusion needed) and cmd-switching PMP. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata-pmp-prep: implement ops->qc_defer()Tejun Heo2007-10-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Controllers which support PMP have various restrictions on which combinations of commands are allowed to what number of devices concurrently. This patch implements ops->qc_defer() which determines whether a qc can be issued at the moment or should be deferred. If the function returns ATA_DEFER_LINK, the qc will be deferred until a qc completes on the link. If ATA_DEFER_PORT, until a qc completes on any link. The defer conditions are advisory and in general ATA_DEFER_LINK can be considered as lower priority deferring than ATA_DEFER_PORT. ops->qc_defer() replaces fixed ata_scmd_need_defer(). For standard NCQ/non-NCQ exclusion, ata_std_qc_defer() is implemented. ahci and sata_sil24 are converted to use ata_std_qc_defer(). ops->qc_defer() is heavier than the original mechanism because full qc is prepped before determining to defer it, but various information is needed to determine defer conditinos and fully translating a qc is the only way to supply such information in generic manner. IMHO, this shouldn't cause any noticeable performance issues as * for most cases deferring occurs rarely (except for NCQ-aware cmd-switching PMP) * translation itself isn't that expensive * once deferred the command won't be repeated until another command completes which usually is a very long time cpu-wise. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata-pmp-prep: make a number of functions global to libataTejun Heo2007-10-12
| | | | | | | | Make a number of functions from libata-core.c and libata-eh.c global to libata (drivers/ata/libata.h). These will be used by PMP. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata-pmp-prep: add @new_class to ata_dev_revalidate()Tejun Heo2007-10-12
| | | | | | | | | | Consider newly found class code while revalidating. PMP resetting always results in valid class code and issuing PMP commands to ATA/ATAPI device isn't very attractive. Add @new_class to ata_dev_revalidate() and check class code for revalidation. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata-pmp-prep: add PMP related constants, fields, ops and update helpersTejun Heo2007-10-12
| | | | | | | | Add PMP related constants, fields and ops. Also, update ata_class_enabled/disabled() such that PMP classes are considered. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: misc updates for ANTejun Heo2007-10-12
| | | | | | | | | | | | | | | Update AN support in preparation of PMP support. * s/ata_id_has_AN/ata_id_has_atapi_AN/ * add AN enabled reporting during configuration * add err_mask to AN configuration failure reporting * update LOCKING comment for ata_scsi_media_change_notify() * check whether ATA dev is attached to SCSI dev ata_scsi_media_change_notify() * set ATA_FLAG_AN in ahci and sata_sil24 Signed-off-by: Tejun Heo <htejun@gmail.com> Cc: Kriten Carlson Accardi <kristen.c.accardi@intel.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [libata] SCSI: simulator version, not device version, belongs in VPDJeff Garzik2007-10-12
| | | | Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [libata] SCSI: clean up R/W recovery mode pageJeff Garzik2007-10-12
| | | | | | | | | Clear ARRE, we don't do auto-reallocation on reads, just on writes. Also, hardcode the size of the array using RW_RECOVERY_MPAGE_LEN, following the style of the surrounding code. Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [libata] SCSI: improve FORMAT UNIT; minor code cleanupsJeff Garzik2007-10-12
| | | | | | | | | | | | | | | | | | * SAT specifies that FORMAT UNIT should be translated into a series of READ and WRITE commands that zero the ATA device. That is far too cumbersome to bother with. Since we don't actually format the device, the old behavior of always returning success was inaccurate. Change FORMAT UNIT from returning success immediately (old behavior) to always returning an error (new behavior). * Add some comments around SYNCHRONIZE CACHE * Shuffle scsi command code around a bit, so that things are close to alphabetic order. Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
* [libata] Slightly improved no-op REQUEST SENSE, SEND DIAGNOSTICJeff Garzik2007-10-12
| | | | | | | | | | | | A few pedantic apps care about missing or lame "mandatory" SCSI commands, so REQUEST SENSE -- as we autosense, R.S. just returns zeroes SEND DIAGNOSTIC -- our default (no-op) self-test succeeds, all other requests for testing fail. Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [libata] SCSI: support INQUIRY page 89h (ATA info page)Jeff Garzik2007-10-12
| | | | Signed-off-by: Jeff Garzik <jeff@garzik.org>
* ahci: RAID mode SATA patch for Intel TolapaiJason Gaston2007-10-12
| | | | | Signed-off-by: Jason Gaston <jason.d.gaston@intel.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: assume ATA_DEV_ATA on diagnostic failureTejun Heo2007-10-12
| | | | | | | | | | | | | | | Certain device which reports diagnostic failure also reports invalid device signature. Assume ATA_DEV_ATA on diagnostic failure if reset indicates device presence. This is fix for bugzilla bug 8784. http://bugzilla.kernel.org/show_bug.cgi?id=8784 Signed-off-by: Tejun Heo <htejun@gmail.com> Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Edward Amsden <amsden_linux@earthlink.net> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: update ata_dev_try_classify() argumentsTejun Heo2007-10-12
| | | | | | | | | | | | Make ata_dev_try_classify() take a pointer to ata_device instead of ata_port/port_number combination for consistency and add @present argument. @present indicates whether the device seems present during reset. It's the result of TF access during softreset and link onlineness during hardreset. @present will be used to improve diagnostic failure handling. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* ahci: reimplement port_map handlingTejun Heo2007-10-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | Reimplement port_map handling such that 1. Non-zero PORTS_IMPL value is always examined and used if consistent with cap.n_ports. 2. When PI and cat.n_ports are inconsistent, honor cap.n_ports and force port_map to be ((1 << cap.n_ports) - 1). 3. There were two separate places dealing with port_map. Unify them to one. As all newer ahci chips seem to get PI correct and older ones usually have zero PI. Controllers with holes in PI are very unlikely to screw up PI, so #2 makes more sense than following inconsistent PI. Without this change, not setting ATA_FLAG_HONOR_PI when it's needed results in weird detection failure. This changed logic should be able to handle all known cases correctly automatically. Verified on ICH6 (reports 0 PI), ICH8 (with holes in port_map), ICH9, JMB360 and JMB363. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: remiplement ata_hpa_resize()Tejun Heo2007-10-12
| | | | | | | | | | | | | | | | | | | | | | | | | This patch reimplement ata_hpa_resize() such that... * All HPA related decisions are made inside ata_hpa_resize() proper. ata_hpa_resize() returns 0 if configuration can proceed, -errno if device needs to be reset and reconfigured. * All errors are handled properly. If HPA unlocking isn't requested, HPA handling is disabled automatically to avoid unnecessary device detection failure. * Messages are trimmed. HPA detection message is printed only during initial configuration. HPA unlocked message is printed only during initial configuration or unlocking results in different size. * Instead of using sectors returned in TF of SET_MAX, re-read IDENTIFY data as that's the value the device is going to use. * It's called early during ata_dev_configure() as IDENTIFY data might change after resizing. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: clean up read/set native_max address functionsTejun Heo2007-10-12
| | | | | | | | | | | | | | | | Merge ata_read_native_max_addres_ext() into ata_read_native_max_address() and combine ata_set_native_max_address_ext() and ata_set_native_max_address() into ata_set_max_sectors(). * reduce duplicate code * return 0 or -errno depending on error conditions * report if command fails * use ATA_LBA instead of 0x40 This is in preparation of ata_hpa_resize() update. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: move ata_id_n_sectors() upwardTejun Heo2007-10-12
| | | | | | | | Move ata_id_n_sectors() upward right below ata_id_c_string(). This is to accomodate later changes. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* ata: increase allowed config flagsKristen Carlson Accardi2007-10-12
| | | | | | | | | In anticipation of more features, increase number of config flags allowed, and move the init flags. Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Cc: Hugh Dickens <hugh@veritas.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* ata_piix: replace spaces with tabsJason Gaston2007-10-12
| | | | | | | This patch removes some incorrect formatting spaces and replaces them with tabs. Signed-off-by: Jason Gaston <jason.d.gaston@intel.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata-scsi: convert to use the data buffer accessorsBoaz Harrosh2007-10-12
| | | | | | | | simple search-and-replace of direct scsi_cmnd access to use the data buffer accessors. Signed-off-by: Boaz Harrosh <bharrosh@panasas.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata-scsi: Remove !use_sg code pathsBoaz Harrosh2007-10-12
| | | | | | | | | | | | | | This is a minimal patch needed to remove use of !use_sg but it is not a complete clean up of the !use_sg paths. Libata-core still has the qc->flags & ATA_QCFLAG_SG and !qc->n_elem code paths. Perhaps an ata maintainer would have a go at it. - TODO: further cleanup of qc->flags & ATA_QCFLAG_SG and !qc->n_elem code paths in libata-core - TODO: Use scsi_dma_{map,unmap} where applicable. Signed-off-by: Jeff Garzik <jeff@garzik.org>
* pdc2027x: Switch properly to ioread/iowriteAlan Cox2007-10-12
| | | | | | | | Some iomap functions were still using readl/writel and friends which happens to work on most platforms but is not correct. Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: Update experimental tags to reflect reality betterAlan Cox2007-10-12
| | | | | Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [libata] blacklist Maxtor*BANC* using new wildcard blacklist matchingJeff Garzik2007-10-12
| | | | | | | | | | Support the use of '*' in model_num and model_rev entries in ata_device_blacklist[]. Based largely on David Milburn's "libata-core: support wildcard matching in ata_blacklist_entry" patch. Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [libata] ata_piix: Use more-robust form of array initializationJeff Garzik2007-10-12
| | | | | | | Use a form of array init that is less fragile, less sensitive to trivial typos and ordering mismatches. Signed-off-by: Jeff Garzik <jeff@garzik.org>
* AVR32 PATA driverKristoffer Nyborg Gregertsen2007-10-12
| | | | | | | | | | | | | | | | | Updated and simplified driver. Use only register transfer timing for both data and register transfers. This gives poorer performance in PIO1 and 2, but should not be a problem in PIO3 and 4, correct me if I'm wrong :) The driver works very we'll but I still wonder about the interrupts. I have an interrupt line, that works nicely when POLLING flag is not set. The problem is the number of interrupts that eat away my CPU cycles. When using the POLLING flag there seem to be some interrupts that dosen't get cleared. Furthermore the device dosen't drive INTRQ high, it stays at 2.5 volts and generates a lot of interrupts due to ripple / noise. What to do? Signed-off-by: Kristoffer Nyborg Gregertsen <kngregertsen@norway.atmel.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata driver for bf548 on chip ATAPI controller.Sonic Zhang2007-10-12
| | | | | | | | Fix all issues pointed out in Jeff's email. Acked-by: Alan Cox <alan@redhat.com> Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: move EH repeat reporting into ata_eh_report()Tejun Heo2007-10-12
| | | | | | | | | | | | | | | | | EH is sometimes repeated without any error or action. For example, this happens when probing IDENTIFY fails because of a phantom device. In these cases, all the repeated EH does is making sure there is no unhandled error or pending action and return. This repeation is necessary to avoid losing any event which occurred while EH was in progress. Unfortunately, this dry run causes annonying "EH pending after completion" message. This patch moves the repeat reporting into ata_eh_report() such that it's more compact and skipped on dry runs. Signed-off-by: Tejun Heo <htejun@gmail.com> Cc: Mikael Pettersson <mikep@it.uu.se> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: implement and use ata_port_desc() to report port configurationTejun Heo2007-10-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, port configuration reporting has the following problems. * iomapped address is reported instead of raw address * report contains irrelevant fields or lacks necessary fields for non-SFF controllers. * host->irq/irq2 are there just for reporting and hacky. This patch implements and uses ata_port_desc() and ata_port_pbar_desc(). ata_port_desc() is almost identical to ata_ehi_push_desc() except that it takes @ap instead of @ehi, has no locking requirement, can only be used during host initialization and " " is used as separator instead of ", ". ata_port_pbar_desc() is a helper to ease reporting of a PCI BAR or an offsetted address into it. LLD pushes whatever description it wants using the above two functions. The accumulated description is printed on host registration after "[S/P]ATA max MAX_XFERMODE ". SFF init helpers and ata_host_activate() automatically add descriptions for addresses and irq respectively, so only LLDs which isn't standard SFF need to add custom descriptions. In many cases, such controllers need to report different things anyway. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: pata_pdc2027x PLL detection minor cleanupAlbert Lee2007-10-12
| | | | | | | | Minor cleanup to remove the unneeded rmb()s per Jeff's advice. Also removed the pll_clock < 0 check since pll_clock now guaranteed to be >= 0 after Mikael's patch. Signed-off-by: Albert Lee <albertcc@tw.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: Strict checking for identify reportingAlan Cox2007-10-12
| | | | | | | | | | | | | | The ATA specifications require checks on certain flags before assuming the validity of other data. Go through the methods and correct those needing extra checks. Also note limits on ata_id_major_version with respect to ATA-1 and ATA-2. Correct the 32bit PIO check. Wants to sit in -mm for a bit in case of a screwup on my part that I didn't hit on the test drives and also in case someone, somewhere has a drive that gets it wrong. Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: Spot bridge chipsAlan Cox2007-10-12
| | | | | | | | | | | | | If we have a PATA cable with a SATA drive on it then we've found a bridge and we can flip the cable type. This fixes some cable detect problems with SATA bridges on chipsets and misdetected cable types. In theory cable detection and mode limiting is needed if you put a SATA/PATA bridge on a 40 wire cable, but I see no way to deal with that other than to point out its not a good idea anyway. Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata-portmap: Remove unused definitionsAlan Cox2007-10-12
| | | | | | | | With the PCI layer properly handling legacy IDE and the kernel now using it these can go Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: Switch most of the remaining SFF drivers to ata_sff_port_startAlan Cox2007-10-12
| | | | | | | | This avoids allocating DMA buffers if not needed but at the moment is mostly just a neatness item. Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [libata] Remove ->port_disable() hookJeff Garzik2007-10-12
| | | | | | | | It was always set to ata_port_disable(). Removed the hook, and replaced the very few ap->ops->port_disable() callsites with direct calls to ata_port_disable(). Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata pata_via: ACPI checks for 80wire cableAlan Cox2007-10-12
| | | | | | | | Testing this on the VIA boards fixes several problems with otherwise undetectable SATA bridge chips Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata pata_amd: ACPI checks for 80wire cableAlan Cox2007-10-12
| | | | | | | | We can make use of this on the pata_amd driver as many Nvidia devices don't have reliable cable detect. Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [libata] add ACPI cable detect APIAlan Cox2007-10-12
| | | | | | | | | | | | | | | | | | | | | | | | | | Combined from two Alan Cox patches: 1) libata: ACPI checks for 80wire cable We can use the ACPI mode information with several drivers as a hint to cable type. If the ACPI mode set by the BIOS is faster than UDMA33 then we know the BIOS thinks there are 80wire cables. If it doesn't set such a mode or it has no ACPI method then we get no further information and can rely on existing approaches Introduce the function headers needed. Null it out for non ACPI boxes Signed-off-by: Alan Cox <alan@redhat.com> 2) libata: ACPI checks for 80wire cable Provide actual methods for checking if the ACPI support thinks the cable is 80wire, or doesn't know Signed-off-by: Alan Cox <alan@redhat.com> Combined into a single changeset and Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [libata] Remove ->irq_ack() hook, and ata_dummy_irq_on()Jeff Garzik2007-10-12
| | | | | | | | | | | | | * ->irq_ack() is redundant to what the irq handler already performs... chk-status + irq-clear. Furthermore, it is only called in one place, when screaming-irq-debugging is enabled, so we don't want to bother with a hook just for that. * ata_dummy_irq_on() is only ever used in drivers that have no callpath reaching ->irq_on(). Remove .irq_on hook from those drivers, and the now-unused ata_dummy_irq_on() Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: add printf format attribute to ehi desc functionsTejun Heo2007-10-12
| | | | | | | | Tell the compiler that [__]ata_ehi_push_desc() functions take printf style format string and arguments. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: use ata_port_printk() in ata_wait_idle()Tejun Heo2007-10-12
| | | | | | | | | | ata_wait_idle() identified controller by printing out the address of the Status register. This is bogus because 1. it's iomapped address 2. some controllers don't have Status register and don't initialize the field. Use ata_port_printk() instead. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata-add-irq_flags-to-struct-pata_platform_info-fixAndrew Morton2007-10-12
| | | | | | | | | | | Remove unneeded, undesirable cast of void*. Cc: Jeff Garzik <jeff@garzik.org> Cc: Sonic Zhang <sonic.adi@gmail.com> Cc: Tejun Heo <htejun@gmail.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* ata_piix: disallow UDMA 133 on ICH5 & ICH7Christian Lamparter2007-10-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There is another outstanding issue with ata_piix.c. Intel has never officially supported anything faster than PATA 100MB/s. But, the ata_piix.c driver "define" the ICH5 & ICH7 as UDMA6 (aka 133MB/s) capable. [ Well, no one has probably noticed it before, because there is bug in do_pata_set_dmamode... Just look at libata_atapiix_enable_real_udma133.patch and you'll see what wrong with it. ] Here are Intel's datasheets for the affected chipsets: ICH5 Datasheet: http://www.intel.com/design/chipsets/datashts/252516.htm (See note on page 183: "... the ICH5 supports reads at the maximum rate of 100MB/s.") ICH7 Datasheet: http://www.intel.com/design/chipsets/datashts/307013.htm (See first note on page 190: "... the ICH7 supports reads at the maximum rate of 100MB/s.") They are two different ways to deal with it: - Either - 1. replace all ich_pata_133 with ich_pata_100. (libata_atapiix_disable_udma6.diff - diff from 2.6.22 ) - Or - 2. keep all ich_pata_133 and fix the bug in "do_pata_set_dmamode". (libata_atapiix_enable_real_udma133.patch - diff from 2.6.22) If there are any concerns about the safety of the patch patch: http://lkml.org/lkml/2007/7/6/292 (It was already tested by an Intel employee, but I guess a bit more user input is necessary here... ) This patch implements 1. Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Jeff Garzik <jeff@garzik.org> Cc: Tejun Heo <htejun@gmail.com> Signed-off-by: Christian Lamparter <chunkeey@web.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* ahci: Store interrupt valueKristen Carlson Accardi2007-10-12
| | | | | | | | | Use a stored value for which interrupts to enable. Changing this allows us to selectively turn off certain interrupts later and have them stay off. Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [libata] ahci: send event when AN receivedKristen Carlson Accardi2007-10-12
| | | | | | | | | When we get an SDB FIS with the 'N' bit set, we should send an event to user space to indicate that there has been a media change. This will be done via the scsi device. Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [libata] check for SATA async notify supportKristen Carlson Accardi2007-10-12
| | | | | | | | Check to see if an ATAPI device supports Asynchronous Notification. If so, enable it, if the host controller supports AN. Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* pata_cmd64x: Set up MWDMA modes properlyAlan Cox2007-10-12
| | | | | | | | | | Set the MWDMA timing by updating the correct registers. Split the PIO path as this is mostly shared code. Wants testing. Signed-off-by: Alan Cox <alan@redhat.com> Tested-by: Mikael Pettersson <mikpe@it.uu.se> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata: Note that our cache flush code needs fixing upAlan Cox2007-10-12
| | | | | | | Remembered this while doing auditing and code review versus the specs Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* libata-core: Document some limits/assumptions about ID_ATAAlan Cox2007-10-12
| | | | | Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
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