summaryrefslogtreecommitdiff
AgeCommit message (Collapse)Author
2020-02-24net/mlxfw: fix spelling mistake: "progamming" -> "programming"Colin Ian King
There is a spelling mistake in a literal string. Fix it. Signed-off-by: Colin Ian King <colin.king@canonical.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-24net: Remove unneeded export of a couple of xdp generic functionsDavid Ahern
generic_xdp_tx and xdp_do_generic_redirect are only used by builtin code, so remove the EXPORT_SYMBOL_GPL for them. Signed-off-by: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-24Merge branch 'net-ll_temac-Bugfixes'David S. Miller
Esben Haabendal says: ==================== net: ll_temac: Bugfixes Fix a number of bugs which have been present since the first commit. The bugs fixed in patch 1,2 and 4 have all been observed in real systems, and was relatively easy to reproduce given an appropriate stress setup. Changes since v1: - Changed error handling of of dma_map_single() in temac_start_xmit() to drop packet instead of returning NETDEV_TX_BUSY. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-24net: ll_temac: Handle DMA halt condition caused by buffer underrunEsben Haabendal
The SDMA engine used by TEMAC halts operation when it has finished processing of the last buffer descriptor in the buffer ring. Unfortunately, no interrupt event is generated when this happens, so we need to setup another mechanism to make sure DMA operation is restarted when enough buffers have been added to the ring. Fixes: 92744989533c ("net: add Xilinx ll_temac device driver") Signed-off-by: Esben Haabendal <esben@geanix.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-24net: ll_temac: Fix RX buffer descriptor handling on GFP_ATOMIC pressureEsben Haabendal
Failures caused by GFP_ATOMIC memory pressure have been observed, and due to the missing error handling, results in kernel crash such as [1876998.350133] kernel BUG at mm/slub.c:3952! [1876998.350141] invalid opcode: 0000 [#1] PREEMPT SMP PTI [1876998.350147] CPU: 2 PID: 0 Comm: swapper/2 Not tainted 5.3.0-scnxt #1 [1876998.350150] Hardware name: N/A N/A/COMe-bIP2, BIOS CCR2R920 03/01/2017 [1876998.350160] RIP: 0010:kfree+0x1ca/0x220 [1876998.350164] Code: 85 db 74 49 48 8b 95 68 01 00 00 48 31 c2 48 89 10 e9 d7 fe ff ff 49 8b 04 24 a9 00 00 01 00 75 0b 49 8b 44 24 08 a8 01 75 02 <0f> 0b 49 8b 04 24 31 f6 a9 00 00 01 00 74 06 41 0f b6 74 24 5b [1876998.350172] RSP: 0018:ffffc900000f0df0 EFLAGS: 00010246 [1876998.350177] RAX: ffffea00027f0708 RBX: ffff888008d78000 RCX: 0000000000391372 [1876998.350181] RDX: 0000000000000000 RSI: ffffe8ffffd01400 RDI: ffff888008d78000 [1876998.350185] RBP: ffff8881185a5d00 R08: ffffc90000087dd8 R09: 000000000000280a [1876998.350189] R10: 0000000000000002 R11: 0000000000000000 R12: ffffea0000235e00 [1876998.350193] R13: ffff8881185438a0 R14: 0000000000000000 R15: ffff888118543870 [1876998.350198] FS: 0000000000000000(0000) GS:ffff88811f300000(0000) knlGS:0000000000000000 [1876998.350203] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 s#1 Part1 [1876998.350206] CR2: 00007f8dac7b09f0 CR3: 000000011e20a006 CR4: 00000000001606e0 [1876998.350210] Call Trace: [1876998.350215] <IRQ> [1876998.350224] ? __netif_receive_skb_core+0x70a/0x920 [1876998.350229] kfree_skb+0x32/0xb0 [1876998.350234] __netif_receive_skb_core+0x70a/0x920 [1876998.350240] __netif_receive_skb_one_core+0x36/0x80 [1876998.350245] process_backlog+0x8b/0x150 [1876998.350250] net_rx_action+0xf7/0x340 [1876998.350255] __do_softirq+0x10f/0x353 [1876998.350262] irq_exit+0xb2/0xc0 [1876998.350265] do_IRQ+0x77/0xd0 [1876998.350271] common_interrupt+0xf/0xf [1876998.350274] </IRQ> In order to handle such failures more graceful, this change splits the receive loop into one for consuming the received buffers, and one for allocating new buffers. When GFP_ATOMIC allocations fail, the receive will continue with the buffers that is still there, and with the expectation that the allocations will succeed in a later call to receive. Fixes: 92744989533c ("net: add Xilinx ll_temac device driver") Signed-off-by: Esben Haabendal <esben@geanix.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-24net: ll_temac: Add more error handling of dma_map_single() callsEsben Haabendal
This adds error handling to the remaining dma_map_single() calls, so that behavior is well defined if/when we run out of DMA memory. Fixes: 92744989533c ("net: add Xilinx ll_temac device driver") Signed-off-by: Esben Haabendal <esben@geanix.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-24net: ll_temac: Fix race condition causing TX hangEsben Haabendal
It is possible that the interrupt handler fires and frees up space in the TX ring in between checking for sufficient TX ring space and stopping the TX queue in temac_start_xmit. If this happens, the queue wake from the interrupt handler will occur before the queue is stopped, causing a lost wakeup and the adapter's transmit hanging. To avoid this, after stopping the queue, check again whether there is sufficient space in the TX ring. If so, wake up the queue again. This is a port of the similar fix in axienet driver, commit 7de44285c1f6 ("net: axienet: Fix race condition causing TX hang"). Fixes: 23ecc4bde21f ("net: ll_temac: fix checksum offload logic") Signed-off-by: Esben Haabendal <esben@geanix.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-24KVM: s390: rstify new ioctls in api.rstChristian Borntraeger
We also need to rstify the new ioctls that we added in parallel to the rstification of the kvm docs. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: David Hildenbrand <david@redhat.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-24mac80211: Add api to support configuring TID specific configurationTamizh chelvam
Implement drv_set_tid_config api to allow TID specific configuration and drv_reset_tid_config api to reset peer specific TID configuration. This per-TID onfiguration will be applied for all the connected stations when MAC is NULL. Signed-off-by: Tamizh chelvam <tamizhr@codeaurora.org> Link: https://lore.kernel.org/r/1579506687-18296-7-git-send-email-tamizhr@codeaurora.org Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2020-02-24nl80211: Add support to configure TID specific RTSCTS configurationTamizh chelvam
This patch adds support to configure per TID RTSCTS control configuration to enable/disable through the NL80211_TID_CONFIG_ATTR_RTSCTS_CTRL attribute. Signed-off-by: Tamizh chelvam <tamizhr@codeaurora.org> Link: https://lore.kernel.org/r/1579506687-18296-5-git-send-email-tamizhr@codeaurora.org Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2020-02-24nl80211: Add support to configure TID specific AMPDU configurationTamizh chelvam
This patch adds support to configure per TID AMPDU control configuration to enable/disable aggregation through the NL80211_TID_CONFIG_ATTR_AMPDU_CTRL attribute. Signed-off-by: Tamizh chelvam <tamizhr@codeaurora.org> Link: https://lore.kernel.org/r/1579506687-18296-4-git-send-email-tamizhr@codeaurora.org Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2020-02-24nl80211: Add support to configure TID specific retry configurationTamizh chelvam
This patch adds support to configure per TID retry configuration through the NL80211_TID_CONFIG_ATTR_RETRY_SHORT and NL80211_TID_CONFIG_ATTR_RETRY_LONG attributes. This TID specific retry configuration will have more precedence than phy level configuration. Signed-off-by: Tamizh chelvam <tamizhr@codeaurora.org> Link: https://lore.kernel.org/r/1579506687-18296-3-git-send-email-tamizhr@codeaurora.org [rebase completely on top of my previous API changes] Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2020-02-24nl80211: modify TID-config APIJohannes Berg
Make some changes to the TID-config API: * use u16 in nl80211 (only, and restrict to using 8 bits for now), to avoid issues in the future if we ever want to use higher TIDs. * reject empty TIDs mask (via netlink policy) * change feature advertising to not use extended feature flags but have own mechanism for this, which simplifies the code * fix all variable names from 'tid' to 'tids' since it's a mask * change to cfg80211_ name prefixes, not ieee80211_ * fix some minor docs/spelling things. Change-Id: Ia234d464b3f914cdeab82f540e018855be580dce Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2020-02-24nl80211: Add NL command to support TID speicific configurationsTamizh chelvam
Add the new NL80211_CMD_SET_TID_CONFIG command to support data TID specific configuration. Per TID configuration is passed in the nested NL80211_ATTR_TID_CONFIG attribute. This patch adds support to configure per TID noack policy through the NL80211_TID_CONFIG_ATTR_NOACK attribute. Signed-off-by: Tamizh chelvam <tamizhr@codeaurora.org> Link: https://lore.kernel.org/r/1579506687-18296-2-git-send-email-tamizhr@codeaurora.org Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2020-02-24mac80211: rx: avoid RCU list traversal under mutexMadhuparna Bhowmik
local->sta_mtx is held in __ieee80211_check_fast_rx_iface(). No need to use list_for_each_entry_rcu() as it also requires a cond argument to avoid false lockdep warnings when not used in RCU read-side section (with CONFIG_PROVE_RCU_LIST). Therefore use list_for_each_entry(); Signed-off-by: Madhuparna Bhowmik <madhuparnabhowmik10@gmail.com> Link: https://lore.kernel.org/r/20200223143302.15390-1-madhuparnabhowmik10@gmail.com Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2020-02-24nl80211: explicitly include if_vlan.hJohannes Berg
We use that here, and do seem to get it through some recursive include, but better include it explicitly. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Link: https://lore.kernel.org/r/20200224093814.1b9c258fec67.I45ac150d4e11c72eb263abec9f1f0c7add9bef2b@changeid Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2020-02-24mac80211_hwsim: enable Beacon protectionJouni Malinen
Now that there is support for BIGTK configuration and AP/STA functionality for using BIP with Beacon frames, indicate support for the Beacon protection functionality. Johannes: move this to hwsim, since it's not clear that all drivers using mac80211 will do this correctly - lots of them modify the beacon before transmission e.g. to update the TIM element, and that would obviously break the signature. Signed-off-by: Jouni Malinen <jouni@codeaurora.org> Link: https://lore.kernel.org/r/20200222132548.20835-7-jouni@codeaurora.org Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2020-02-24mac80211: Beacon protection using the new BIGTK (STA)Jouni Malinen
This adds support for mac80211 to verify that received Beacon frames have a valid MME in station mode when a BIGTK is configured. Signed-off-by: Jouni Malinen <jouni@codeaurora.org> Link: https://lore.kernel.org/r/20200222132548.20835-6-jouni@codeaurora.org Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2020-02-24mac80211: Beacon protection using the new BIGTK (AP)Jouni Malinen
This adds support for mac80211 to add an MME into Beacon frames in AP mode when a BIGTK is configured. Signed-off-by: Jouni Malinen <jouni@codeaurora.org> Link: https://lore.kernel.org/r/20200222132548.20835-5-jouni@codeaurora.org Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2020-02-24mac80211: Update BIP to support Beacon framesJouni Malinen
When BIP is used to protect Beacon frames, the Timestamp field is masked to zero. Otherwise, the BIP processing is identical to the way it was already used with group-addressed Robust Management frames. Signed-off-by: Jouni Malinen <jouni@codeaurora.org> Link: https://lore.kernel.org/r/20200222132548.20835-4-jouni@codeaurora.org Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2020-02-24mac80211: Support BIGTK configuration for Beacon protectionJouni Malinen
Extend mac80211 key configuration to support the new BIGTK with key index values 6 and 7. Support for actually protecting Beacon frames (adding the MME in AP mode and checking it in STA mode) is covered in separate commits. Signed-off-by: Jouni Malinen <jouni@codeaurora.org> Link: https://lore.kernel.org/r/20200222132548.20835-3-jouni@codeaurora.org Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2020-02-24cfg80211: Support key configuration for Beacon protection (BIGTK)Jouni Malinen
IEEE P802.11-REVmd/D3.0 adds support for protecting Beacon frames using a new set of keys (BIGTK; key index 6..7) similarly to the way group-addressed Robust Management frames are protected (IGTK; key index 4..5). Extend cfg80211 and nl80211 to allow the new BIGTK to be configured. Add an extended feature flag to indicate driver support for the new key index values to avoid array overflows in driver implementations and also to indicate to user space when this functionality is available. Signed-off-by: Jouni Malinen <jouni@codeaurora.org> Link: https://lore.kernel.org/r/20200222132548.20835-2-jouni@codeaurora.org Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2020-02-24cfg80211: More error messages for key addition failuresJouni Malinen
These were helpful while working with extensions to NL80211_CMD_NEW_KEY, so add more explicit error reporting for additional cases that can fail while that command is being processed. Signed-off-by: Jouni Malinen <jouni@codeaurora.org> Link: https://lore.kernel.org/r/20200222132548.20835-1-jouni@codeaurora.org Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2020-02-24cfg80211: fix indentation errorsJérôme Pouiller
Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20200221115604.594035-10-Jerome.Pouiller@silabs.com Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2020-02-24cfg80211: merge documentations of field "dev"Jérôme Pouiller
The field "dev" was documented on two places. This patch merges the comments. Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20200221115604.594035-8-Jerome.Pouiller@silabs.com Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2020-02-24cfg80211: merge documentations of field "debugfsdir"Jérôme Pouiller
The field "privid" is documented twice. Comments were more or less the same. The patch merge them. Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20200221115604.594035-7-Jerome.Pouiller@silabs.com Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2020-02-24cfg80211: drop duplicated documentation of field "reg_notifier"Jérôme Pouiller
The field "reg_notifier" was already documented above the definition of struct wiphy. The comment inside the definition of the struct did not bring more information. Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20200221115604.594035-6-Jerome.Pouiller@silabs.com Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2020-02-24cfg80211: drop duplicated documentation of field "perm_addr"Jérôme Pouiller
The field "perm_addr" was already documented above the definition of struct wiphy. Comments were almost identical. Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20200221115604.594035-5-Jerome.Pouiller@silabs.com Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2020-02-24cfg80211: drop duplicated documentation of field "_net"Jérôme Pouiller
The field "_net" was already documented above the definition of struct wiphy. Both comments were identical. Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20200221115604.594035-4-Jerome.Pouiller@silabs.com Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2020-02-24cfg80211: drop duplicated documentation of field "registered"Jérôme Pouiller
Field "registered" was documented three times: twice in the documentation block of struct wiphy and once inside the struct definition. This patch keep only one comment. Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20200221115604.594035-3-Jerome.Pouiller@silabs.com Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2020-02-24cfg80211: drop duplicated documentation of field "privid"Jérôme Pouiller
The field "privid" was already documented above the definition of struct wiphy. Comments were not identical, but they said more or less the same thing. Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20200221115604.594035-2-Jerome.Pouiller@silabs.com Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2020-02-24cfg80211: drop duplicated documentation of field "probe_resp_offload"Jérôme Pouiller
The field "probe_resp_offload" was already documented above the definition of struct wiphy. Both comments were identical. Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20200221115604.594035-1-Jerome.Pouiller@silabs.com Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2020-02-24Revert "nl80211: add src and dst addr attributes for control port tx/rx"Johannes Berg
This reverts commit 8c3ed7aa2b9ef666195b789e9b02e28383243fa8. As Jouni points out, there's really no need for this, since the RSN pre-authentication frames are normal data frames, not port control frames (locally). We can still revert this now since it hasn't actually gone beyond -next. Fixes: 8c3ed7aa2b9e ("nl80211: add src and dst addr attributes for control port tx/rx") Signed-off-by: Johannes Berg <johannes.berg@intel.com> Link: https://lore.kernel.org/r/20200224101910.b746e263287a.I9eb15d6895515179d50964dec3550c9dc784bb93@changeid Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2020-02-24Revert "mac80211: support ↵Johannes Berg
NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211_MAC_ADDRS" This reverts commit 9b125c27998719288e4dcf2faf54511039526692. As Jouni points out, there's really no need for this, since the RSN pre-authentication frames are normal data frames, not port control frames (locally). Fixes: 9b125c279987 ("mac80211: support NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211_MAC_ADDRS") Signed-off-by: Johannes Berg <johannes.berg@intel.com> Link: https://lore.kernel.org/r/20200224101910.b87da63a3cd6.Ic94bc51a370c4aa7d19fbca9b96d90ab703257dc@changeid Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2020-02-23net: core: devlink.c: Hold devlink->lock from the beginning of ↵Madhuparna Bhowmik
devlink_dpipe_table_register() devlink_dpipe_table_find() should be called under either rcu_read_lock() or devlink->lock. devlink_dpipe_table_register() calls devlink_dpipe_table_find() without holding the lock and acquires it later. Therefore hold the devlink->lock from the beginning of devlink_dpipe_table_register(). Suggested-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: Madhuparna Bhowmik <madhuparnabhowmik10@gmail.com> Reviewed-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-23igmp: remove unused macro IGMP_Vx_UNSOLICITED_REPORT_INTERVALLi RongQing
After commit 2690048c01f3 ("net: igmp: Allow user-space configuration of igmp unsolicited report interval"), they are not used now Signed-off-by: Li RongQing <lirongqing@baidu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-23net: phy: Avoid multiple suspendsFlorian Fainelli
It is currently possible for a PHY device to be suspended as part of a network device driver's suspend call while it is still being attached to that net_device, either via phy_suspend() or implicitly via phy_stop(). Later on, when the MDIO bus controller get suspended, we would attempt to suspend again the PHY because it is still attached to a network device. This is both a waste of time and creates an opportunity for improper clock/power management bugs to creep in. Fixes: 803dd9c77ac3 ("net: phy: avoid suspending twice a PHY") Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-23net: ks8851-ml: Fix IRQ handling and lockingMarek Vasut
The KS8851 requires that packet RX and TX are mutually exclusive. Currently, the driver hopes to achieve this by disabling interrupt from the card by writing the card registers and by disabling the interrupt on the interrupt controller. This however is racy on SMP. Replace this approach by expanding the spinlock used around the ks_start_xmit() TX path to ks_irq() RX path to assure true mutual exclusion and remove the interrupt enabling/disabling, which is now not needed anymore. Furthermore, disable interrupts also in ks_net_stop(), which was missing before. Note that a massive improvement here would be to re-use the KS8851 driver approach, which is to move the TX path into a worker thread, interrupt handling to threaded interrupt, and synchronize everything with mutexes, but that would be a much bigger rework, for a separate patch. Signed-off-by: Marek Vasut <marex@denx.de> Cc: David S. Miller <davem@davemloft.net> Cc: Lukas Wunner <lukas@wunner.de> Cc: Petr Stetiar <ynezz@true.cz> Cc: YueHaibing <yuehaibing@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-23docs: networking: phy: Rephrase paragraph for clarityJonathan Neuschäfer
Let's make it a little easier to read. Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-23tc-testing: updated tdc tests for basic filter with u32 extended match rulesRoman Mashak
Signed-off-by: Roman Mashak <mrv@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-23tcp: fix TFO SYNACK undo to avoid double-timestamp-undoNeal Cardwell
In a rare corner case the new logic for undo of SYNACK RTO could result in triggering the warning in tcp_fastretrans_alert() that says: WARN_ON(tp->retrans_out != 0); The warning looked like: WARNING: CPU: 1 PID: 1 at net/ipv4/tcp_input.c:2818 tcp_ack+0x13e0/0x3270 The sequence that tickles this bug is: - Fast Open server receives TFO SYN with data, sends SYNACK - (client receives SYNACK and sends ACK, but ACK is lost) - server app sends some data packets - (N of the first data packets are lost) - server receives client ACK that has a TS ECR matching first SYNACK, and also SACKs suggesting the first N data packets were lost - server performs TS undo of SYNACK RTO, then immediately enters recovery - buggy behavior then performed a *second* undo that caused the connection to be in CA_Open with retrans_out != 0 Basically, the incoming ACK packet with SACK blocks causes us to first undo the cwnd reduction from the SYNACK RTO, but then immediately enters fast recovery, which then makes us eligible for undo again. And then tcp_rcv_synrecv_state_fastopen() accidentally performs an undo using a "mash-up" of state from two different loss recovery phases: it uses the timestamp info from the ACK of the original SYNACK, and the undo_marker from the fast recovery. This fix refines the logic to only invoke the tcp_try_undo_loss() inside tcp_rcv_synrecv_state_fastopen() if the connection is still in CA_Loss. If peer SACKs triggered fast recovery, then tcp_rcv_synrecv_state_fastopen() can't safely undo. Fixes: 794200d66273 ("tcp: undo cwnd on Fast Open spurious SYNACK retransmit") Signed-off-by: Neal Cardwell <ncardwell@google.com> Signed-off-by: Yuchung Cheng <ycheng@google.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-23r8169: improve rtl8169_start_xmitHeiner Kallweit
Only call rtl8169_xmit_frags() if the skb is actually fragmented. This avoid a small overhead for non-fragmented skb's, and it allows to simplify rtl8169_xmit_frags() a little. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-23net: ena: ethtool: remove redundant non-zero check on rcColin Ian King
The non-zero check on rc is redundant as a previous non-zero check on rc will always return and the second check is never reached, hence it is redundant and can be removed. Also remove a blank line. Addresses-Coverity: ("Logically dead code") Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-23tun: Remove unnecessary BUG_ON check in tun_net_xmitDavid Ahern
The BUG_ON for NULL tfile is now redundant due to a recently added null check after the rcu_dereference. Remove the BUG_ON. Cc: Jason Wang <jasowang@redhat.com> Signed-off-by: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-23hv_netvsc: Fix unwanted wakeup in netvsc_attach()Haiyang Zhang
When netvsc_attach() is called by operations like changing MTU, etc., an extra wakeup may happen while netvsc_attach() calling rndis_filter_device_add() which sends rndis messages when queue is stopped in netvsc_detach(). The completion message will wake up queue 0. We can reproduce the issue by changing MTU etc., then the wake_queue counter from "ethtool -S" will increase beyond stop_queue counter: stop_queue: 0 wake_queue: 1 The issue causes queue wake up, and counter increment, no other ill effects in current code. So we didn't see any network problem for now. To fix this, initialize tx_disable to true, and set it to false when the NIC is ready to be attached or registered. Fixes: 7b2ee50c0cd5 ("hv_netvsc: common detach logic") Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-23Linux 5.6-rc3v5.6-rc3Linus Torvalds
2020-02-23net: usb: qmi_wwan: restore mtu min/max values after raw_ip switchDaniele Palmas
usbnet creates network interfaces with min_mtu = 0 and max_mtu = ETH_MAX_MTU. These values are not modified by qmi_wwan when the network interface is created initially, allowing, for example, to set mtu greater than 1500. When a raw_ip switch is done (raw_ip set to 'Y', then set to 'N') the mtu values for the network interface are set through ether_setup, with min_mtu = ETH_MIN_MTU and max_mtu = ETH_DATA_LEN, not allowing anymore to set mtu greater than 1500 (error: mtu greater than device maximum). The patch restores the original min/max mtu values set by usbnet after a raw_ip switch. Signed-off-by: Daniele Palmas <dnlplm@gmail.com> Acked-by: Bjørn Mork <bjorn@mork.no> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-23Merge branch 'mlxsw-Cosmetic-fixes'David S. Miller
Jiri Pirko says: ==================== mlxsw: Cosmetic fixes This is a set of mainly action/trap related cosmetic fixes. No functional changes. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-23mlxsw: pci: Remove unused valuesIdo Schimmel
Since commit f3a52c6162f8 ("mlxsw: pci: Utilize MRSR register to perform FW reset") the driver no longer issues a reset via the PCI BAR, so the offset of the reset bit is unused. Remove it. Signed-off-by: Ido Schimmel <idosch@mellanox.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-23mlxsw: core: Remove priv from listener equality comparisonJiri Pirko
During packet receive, only the first matching RX listener in rx_listener_list is going to get the packet. So there is no meaning in registering two equal listeners with different privs. Remove priv from equality comparison and disable possibility of doing it. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>