libata-eh.c (fac56c2df51bc29b07b3c2dcfabf32a015a0522c) libata-eh.c (ae01b2493c3bf03c504c32ac4ebb01d528508db3)
1/*
2 * libata-eh.c - libata error handling
3 *
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
6 * on emails.
7 *
8 * Copyright 2006 Tejun Heo <htejun@gmail.com>

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3311 */
3312static int ata_eh_set_lpm(struct ata_link *link, enum ata_lpm_policy policy,
3313 struct ata_device **r_failed_dev)
3314{
3315 struct ata_port *ap = ata_is_host_link(link) ? link->ap : NULL;
3316 struct ata_eh_context *ehc = &link->eh_context;
3317 struct ata_device *dev, *link_dev = NULL, *lpm_dev = NULL;
3318 enum ata_lpm_policy old_policy = link->lpm_policy;
1/*
2 * libata-eh.c - libata error handling
3 *
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
6 * on emails.
7 *
8 * Copyright 2006 Tejun Heo <htejun@gmail.com>

--- 3302 unchanged lines hidden (view full) ---

3311 */
3312static int ata_eh_set_lpm(struct ata_link *link, enum ata_lpm_policy policy,
3313 struct ata_device **r_failed_dev)
3314{
3315 struct ata_port *ap = ata_is_host_link(link) ? link->ap : NULL;
3316 struct ata_eh_context *ehc = &link->eh_context;
3317 struct ata_device *dev, *link_dev = NULL, *lpm_dev = NULL;
3318 enum ata_lpm_policy old_policy = link->lpm_policy;
3319 bool no_dipm = ap->flags & ATA_FLAG_NO_DIPM;
3319 unsigned int hints = ATA_LPM_EMPTY | ATA_LPM_HIPM;
3320 unsigned int err_mask;
3321 int rc;
3322
3323 /* if the link or host doesn't do LPM, noop */
3324 if ((link->flags & ATA_LFLAG_NO_LPM) || (ap && !ap->ops->set_lpm))
3325 return 0;
3326
3327 /*
3328 * DIPM is enabled only for MIN_POWER as some devices
3329 * misbehave when the host NACKs transition to SLUMBER. Order
3330 * device and link configurations such that the host always
3331 * allows DIPM requests.
3332 */
3333 ata_for_each_dev(dev, link, ENABLED) {
3334 bool hipm = ata_id_has_hipm(dev->id);
3320 unsigned int hints = ATA_LPM_EMPTY | ATA_LPM_HIPM;
3321 unsigned int err_mask;
3322 int rc;
3323
3324 /* if the link or host doesn't do LPM, noop */
3325 if ((link->flags & ATA_LFLAG_NO_LPM) || (ap && !ap->ops->set_lpm))
3326 return 0;
3327
3328 /*
3329 * DIPM is enabled only for MIN_POWER as some devices
3330 * misbehave when the host NACKs transition to SLUMBER. Order
3331 * device and link configurations such that the host always
3332 * allows DIPM requests.
3333 */
3334 ata_for_each_dev(dev, link, ENABLED) {
3335 bool hipm = ata_id_has_hipm(dev->id);
3335 bool dipm = ata_id_has_dipm(dev->id);
3336 bool dipm = ata_id_has_dipm(dev->id) && !no_dipm;
3336
3337 /* find the first enabled and LPM enabled devices */
3338 if (!link_dev)
3339 link_dev = dev;
3340
3341 if (!lpm_dev && (hipm || dipm))
3342 lpm_dev = dev;
3343

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3384 * with the new policy set.
3385 */
3386 link->lpm_policy = policy;
3387 if (ap && ap->slave_link)
3388 ap->slave_link->lpm_policy = policy;
3389
3390 /* host config updated, enable DIPM if transitioning to MIN_POWER */
3391 ata_for_each_dev(dev, link, ENABLED) {
3337
3338 /* find the first enabled and LPM enabled devices */
3339 if (!link_dev)
3340 link_dev = dev;
3341
3342 if (!lpm_dev && (hipm || dipm))
3343 lpm_dev = dev;
3344

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3385 * with the new policy set.
3386 */
3387 link->lpm_policy = policy;
3388 if (ap && ap->slave_link)
3389 ap->slave_link->lpm_policy = policy;
3390
3391 /* host config updated, enable DIPM if transitioning to MIN_POWER */
3392 ata_for_each_dev(dev, link, ENABLED) {
3392 if (policy == ATA_LPM_MIN_POWER && ata_id_has_dipm(dev->id)) {
3393 if (policy == ATA_LPM_MIN_POWER && !no_dipm &&
3394 ata_id_has_dipm(dev->id)) {
3393 err_mask = ata_dev_set_feature(dev,
3394 SETFEATURES_SATA_ENABLE, SATA_DIPM);
3395 if (err_mask && err_mask != AC_ERR_DEV) {
3396 ata_dev_printk(dev, KERN_WARNING,
3397 "failed to enable DIPM, Emask 0x%x\n",
3398 err_mask);
3399 rc = -EIO;
3400 goto fail;

--- 646 unchanged lines hidden --- 		3395 err_mask = ata_dev_set_feature(dev,
3396 SETFEATURES_SATA_ENABLE, SATA_DIPM);
3397 if (err_mask && err_mask != AC_ERR_DEV) {
3398 ata_dev_printk(dev, KERN_WARNING,
3399 "failed to enable DIPM, Emask 0x%x\n",
3400 err_mask);
3401 rc = -EIO;
3402 goto fail;

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