/* * Copyright (C) 2017 Rafał Miłecki * * Permission to use, copy, modify, and/or distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include #include #include "core.h" static bool wiphy_freq_limits_valid_chan(struct wiphy *wiphy, struct ieee80211_freq_range *freq_limits, unsigned int n_freq_limits, struct ieee80211_channel *chan) { u32 bw = MHZ_TO_KHZ(20); int i; for (i = 0; i < n_freq_limits; i++) { struct ieee80211_freq_range *limit = &freq_limits[i]; if (cfg80211_does_bw_fit_range(limit, MHZ_TO_KHZ(chan->center_freq), bw)) return true; } return false; } static void wiphy_freq_limits_apply(struct wiphy *wiphy, struct ieee80211_freq_range *freq_limits, unsigned int n_freq_limits) { enum nl80211_band band; int i; if (WARN_ON(!n_freq_limits)) return; for (band = 0; band < NUM_NL80211_BANDS; band++) { struct ieee80211_supported_band *sband = wiphy->bands[band]; if (!sband) continue; for (i = 0; i < sband->n_channels; i++) { struct ieee80211_channel *chan = &sband->channels[i]; if (chan->flags & IEEE80211_CHAN_DISABLED) continue; if (!wiphy_freq_limits_valid_chan(wiphy, freq_limits, n_freq_limits, chan)) { pr_debug("Disabling freq %d MHz as it's out of OF limits\n", chan->center_freq); chan->flags |= IEEE80211_CHAN_DISABLED; } } } } void wiphy_read_of_freq_limits(struct wiphy *wiphy) { struct device *dev = wiphy_dev(wiphy); struct device_node *np; struct property *prop; struct ieee80211_freq_range *freq_limits; unsigned int n_freq_limits; const __be32 *p; int len, i; int err = 0; if (!dev) return; np = dev_of_node(dev); if (!np) return; prop = of_find_property(np, "ieee80211-freq-limit", &len); if (!prop) return; if (!len || len % sizeof(u32) || len / sizeof(u32) % 2) { dev_err(dev, "ieee80211-freq-limit wrong format"); return; } n_freq_limits = len / sizeof(u32) / 2; freq_limits = kcalloc(n_freq_limits, sizeof(*freq_limits), GFP_KERNEL); if (!freq_limits) { err = -ENOMEM; goto out_kfree; } p = NULL; for (i = 0; i < n_freq_limits; i++) { struct ieee80211_freq_range *limit = &freq_limits[i]; p = of_prop_next_u32(prop, p, &limit->start_freq_khz); if (!p) { err = -EINVAL; goto out_kfree; } p = of_prop_next_u32(prop, p, &limit->end_freq_khz); if (!p) { err = -EINVAL; goto out_kfree; } if (!limit->start_freq_khz || !limit->end_freq_khz || limit->start_freq_khz >= limit->end_freq_khz) { err = -EINVAL; goto out_kfree; } } wiphy_freq_limits_apply(wiphy, freq_limits, n_freq_limits); out_kfree: kfree(freq_limits); if (err) dev_err(dev, "Failed to get limits: %d\n", err); } EXPORT_SYMBOL(wiphy_read_of_freq_limits); ngs/media?h=nds-private-remove&id=eeeefd41843218c55a8782a6920f044d9bf6207a'>media/c8sectpfe.h
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authorChristoph Hellwig <hch@lst.de>2017-02-05 18:10:35 +0100
committerJens Axboe <axboe@fb.com>2017-02-06 09:34:46 -0700
commiteeeefd41843218c55a8782a6920f044d9bf6207a (patch)
treec342eac46626e62745aa8e1a982626efca8b121d /include/dt-bindings/media/c8sectpfe.h
parentc14024dbb156c8392908aaa822097d27c6af8ec8 (diff)
block: don't try Write Same from __blkdev_issue_zeroout
Write Same can return an error asynchronously if it turns out the underlying SCSI device does not support Write Same, which makes a proper fallback to other methods in __blkdev_issue_zeroout impossible. Thus only issue a Write Same from blkdev_issue_zeroout an don't try it at all from __blkdev_issue_zeroout as a non-invasive workaround. Signed-off-by: Christoph Hellwig <hch@lst.de> Reported-by: Junichi Nomura <j-nomura@ce.jp.nec.com> Fixes: e73c23ff ("block: add async variant of blkdev_issue_zeroout") Tested-by: Junichi Nomura <j-nomura@ce.jp.nec.com> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'include/dt-bindings/media/c8sectpfe.h')