kernel.git/drivers/ata/libata-eh.c, branch linux-3.5.y

libata-eh don't waste time retrying media errors (v3)

2012-05-07T19:40:34Z

ATA and SATA drives have had built-in retries for media errors for as long as they've been commonplace in computers (early 1990s). When libata stumbles across a bad sector, it can waste minutes sitting there doing retry after retry before finally giving up and letting the higher layers deal with it. This patch removes retries for media errors only. Signed-off-by: Mark Lord Signed-off-by: Jeff Garzik

libata: skip old error history when counting probe trials

2012-05-03T18:05:58Z

Commit d902747("[libata] Add ATA transport class") introduced ATA_EFLAG_OLD_ER to mark entries in the error ring as cleared. But ata_count_probe_trials_cb() didn't check this flag and it still counts the old error history. So wrong probe trials count is returned and it causes problem, for example, SATA link speed is slowed down from 3.0Gbps to 1.5Gbps. Fix it by checking ATA_EFLAG_OLD_ER in ata_count_probe_trials_cb(). Cc: stable # 2.6.37+ Signed-off-by: Lin Ming Signed-off-by: Jeff Garzik

[SCSI] libsas: execute transport link resets with libata-eh via host workqueue

2012-02-19T20:13:51Z

Link resets leave ata affiliations intact, so arrange for libsas to make an effort to avoid dropping the device due to a slow-to-recover link. Towards this end carry out reset in the host workqueue so that it can check for ata devices and kick the reset request to libata. Hard resets, in contrast, bypass libata since they are meant for associating an ata device with another initiator in the domain (tears down affiliations). Need to add a new transport_sas_phy_reset() since the current sas_phy_reset() is a utility function to libsas lldds. They are not prepared for it to loop back into eh. Signed-off-by: Dan Williams Signed-off-by: James Bottomley

[libata] Issue SRST to Sil3726 PMP

2011-11-09T06:38:00Z

Reenable sending SRST to devices connected behind a Sil3726 PMP. This allow staggered spinups and handles drives that spins up slowly. While the drives spin up, the PMP will not accept SRST. Most controller reissues the reset until the drive is ready, while some [Sil3124] returns an error. In ata_eh_error, wait 10s before reset the ATA port and try again. Signed-off-by: Gwendal Grignou Acked-by: Tejun Heo Signed-off-by: Jeff Garzik

ide/ata: Add export.h for EXPORT_SYMBOL/THIS_MODULE where needed

2011-10-31T23:31:37Z

They were getting this implicitly by an include of module.h from device.h -- but we are going to clean that up and break that include chain, so include export.h explicitly now. Signed-off-by: Paul Gortmaker

libata-eh: ata_eh_followup_srst_needed() does not need 'classes' parameter

2011-10-08T04:07:15Z

... since it does not use it. Signed-off-by: Sergei Shtylyov Signed-off-by: Jeff Garzik

libata: leave port thawed after reset failure

2011-07-23T21:57:36Z

libata EH intentionally left a port frozen if it failed ata_eh_reset(). The intention was avoiding continuous loop of resets when the controller or attached device is flaky and reporting spurious hotplug events. Once port enters this state, it can be recovered with manual rescan, which seemed reasonable. However, outside of my convoluted test setup, there have been very few reports justifying this choice while there have been more cases where the automatic freezing of the port after hotplug attempt of a faulty device caused confusion and led to unnecessary resets. This patch changes the behavior so that the port is thawed after reset failure. This change doesn't necessarily solve but makes it easier and more intuitive to work around hotplug related problems (ie. re-pluggin or power cycling the device) as reported in the followings. https://bugzilla.kernel.org/show_bug.cgi?id=34712 http://thread.gmane.org/gmane.linux.kernel/1123265/focus=49548 Signed-off-by: Tejun Heo Reported-by: Reartes Guillermo Reported-by: Bruce Stenning Signed-off-by: Jeff Garzik

ata: Convert ata__printk(KERN_ to ata__

2011-07-23T21:57:36Z

Saves text by removing nearly duplicated text format strings by creating ata__printk functions and printf extension %pV. ata defconfig size shrinks ~5% (~8KB), allyesconfig ~2.5% (~13KB) Format string duplication comes from: #define ata_link_printk(link, lv, fmt, args...) do { \ if (sata_pmp_attached((link)->ap) || (link)->ap->slave_link) \ printk("%sata%u.%02u: "fmt, lv, (link)->ap->print_id, \ (link)->pmp , ##args); \ else \ printk("%sata%u: "fmt, lv, (link)->ap->print_id , ##args); \ } while(0) Coalesce long formats. $ size drivers/ata/built-in.* text data bss dec hex filename 544969 73893 116584 735446 b38d6 drivers/ata/built-in.allyesconfig.ata.o 558429 73893 117864 750186 b726a drivers/ata/built-in.allyesconfig.dev_level.o 141328 14689 4220 160237 271ed drivers/ata/built-in.defconfig.ata.o 149567 14689 4220 168476 2921c drivers/ata/built-in.defconfig.dev_level.o Signed-off-by: Joe Perches Signed-off-by: Jeff Garzik

libata: fix unexpectedly frozen port after ata_eh_reset()

2011-06-07T19:55:55Z

To work around controllers which can't properly plug events while reset, ata_eh_reset() clears error states and ATA_PFLAG_EH_PENDING after reset but before RESET is marked done. As reset is the final recovery action and full verification of devices including onlineness and classfication match is done afterwards, this shouldn't lead to lost devices or missed hotplug events. Unfortunately, it forgot to thaw the port when clearing EH_PENDING, so if the condition happens after resetting an empty port, the port could be left frozen and EH will end without thawing it, making the port unresponsive to further hotplug events. Thaw if the port is frozen after clearing EH_PENDING. This problem is reported by Bruce Stenning in the following thread. http://thread.gmane.org/gmane.linux.kernel/1123265 stable: I think we should weather this patch a bit longer in -rcX before sending it to -stable. Please wait at least a month after this patch makes upstream. Thanks. -v2: Fixed spelling in the comment per Dave Howorth. Signed-off-by: Tejun Heo Reported-by: Bruce Stenning Cc: stable@kernel.org Cc: Dave Howorth Signed-off-by: Jeff Garzik

libata: Power off empty ports

2011-05-20T00:50:53Z

Give users the option of completely powering off unoccupied SATA ports using the existing min_power link_power_management_policy option. When the use selects this option on an empty port, we will power the port off by setting DET to off. For occupied ports, behavior is unchanged. Signed-off-by: Kristen Carlson Accardi Signed-off-by: Jeff Garzik