/* * Copyright 2007-2012 Siemens AG * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 * as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * Written by: * Dmitry Eremin-Solenikov * Sergey Lapin * Maxim Gorbachyov * Alexander Smirnov */ #include #include #include #include #include #include #include #include #include "ieee802154_i.h" #include "driver-ops.h" void ieee802154_xmit_worker(struct work_struct *work) { struct ieee802154_local *local = container_of(work, struct ieee802154_local, tx_work); struct sk_buff *skb = local->tx_skb; struct net_device *dev = skb->dev; int res; res = drv_xmit_sync(local, skb); if (res) goto err_tx; ieee802154_xmit_complete(&local->hw, skb, false); dev->stats.tx_packets++; dev->stats.tx_bytes += skb->len; return; err_tx: /* Restart the netif queue on each sub_if_data object. */ ieee802154_wake_queue(&local->hw); kfree_skb(skb); netdev_dbg(dev, "transmission failed\n"); } static netdev_tx_t ieee802154_tx(struct ieee802154_local *local, struct sk_buff *skb) { struct net_device *dev = skb->dev; int ret; if (!(local->hw.flags & IEEE802154_HW_TX_OMIT_CKSUM)) { u16 crc = crc_ccitt(0, skb->data, skb->len); put_unaligned_le16(crc, skb_put(skb, 2)); } /* Stop the netif queue on each sub_if_data object. */ ieee802154_stop_queue(&local->hw); /* async is priority, otherwise sync is fallback */ if (local->ops->xmit_async) { ret = drv_xmit_async(local, skb); if (ret) { ieee802154_wake_queue(&local->hw); goto err_tx; } dev->stats.tx_packets++; dev->stats.tx_bytes += skb->len; } else { local->tx_skb = skb; queue_work(local->workqueue, &local->tx_work); } return NETDEV_TX_OK; err_tx: kfree_skb(skb); return NETDEV_TX_OK; } netdev_tx_t ieee802154_monitor_start_xmit(struct sk_buff *skb, struct net_device *dev) { struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); skb->skb_iif = dev->ifindex; return ieee802154_tx(sdata->local, skb); } netdev_tx_t ieee802154_subif_start_xmit(struct sk_buff *skb, struct net_device *dev) { struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); int rc; /* TODO we should move it to wpan_dev_hard_header and dev_hard_header * functions. The reason is wireshark will show a mac header which is * with security fields but the payload is not encrypted. */ rc = mac802154_llsec_encrypt(&sdata->sec, skb); if (rc) { netdev_warn(dev, "encryption failed: %i\n", rc); kfree_skb(skb); return NETDEV_TX_OK; } skb->skb_iif = dev->ifindex; return ieee802154_tx(sdata->local, skb); } d'>3space:mode:
authorVille Syrjälä <ville.syrjala@linux.intel.com>2016-12-07 19:28:03 +0200
committerJani Nikula <jani.nikula@intel.com>2017-01-03 11:41:28 +0200
commit9169757ae67bc927750ae907624e65cc15b4fe5a (patch)
tree90dad5b633e0ef847934665fa952cdafd6f9cbb9
parentb72eb5ffa6d8601d9ba72619d75fb5b27723743a (diff)
drm/i915: Fix oops in overlay due to frontbuffer tracking
The vma will be NULL if the overlay was previously off, so dereferencing it will oops. Check for NULL before doing that. Cc: stable@vger.kernel.org Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Fixes: 9b3b7841b86d ("drm/i915/overlay: Use VMA as the primary tracker for images") Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1481131693-27993-2-git-send-email-ville.syrjala@linux.intel.com Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> (cherry picked from commit 4a15cdbbc55463e55a7cdcf33f84ccc742ca9c29) Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Diffstat