lwn.git/drivers/net, branch v3.14.75

net: mvneta: set real interrupt per packet for tx_done

2016-08-10T08:21:04+00:00

commit 06708f81528725148473c0869d6af5f809c6824b upstream. Commit aebea2ba0f74 ("net: mvneta: fix Tx interrupt delay") intended to set coalescing threshold to a value guaranteeing interrupt generation per each sent packet, so that buffers can be released with no delay. In fact setting threshold to '1' was wrong, because it causes interrupt every two packets. According to the documentation a reason behind it is following - interrupt occurs once sent buffers counter reaches a value, which is higher than one specified in MVNETA_TXQ_SIZE_REG(q). This behavior was confirmed during tests. Also when testing the SoC working as a NAS device, better performance was observed with int-per-packet, as it strongly depends on the fact that all transmitted packets are released immediately. This commit enables NETA controller work in interrupt per sent packet mode by setting coalescing threshold to 0. Signed-off-by: Dmitri Epshtein Signed-off-by: Marcin Wojtas Fixes aebea2ba0f74 ("net: mvneta: fix Tx interrupt delay") Acked-by: Willy Tarreau Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman

can: fix oops caused by wrong rtnl dellink usage

2016-08-10T08:21:03+00:00

commit 25e1ed6e64f52a692ba3191c4fde650aab3ecc07 upstream. For 'real' hardware CAN devices the netlink interface is used to set CAN specific communication parameters. Real CAN hardware can not be created nor removed with the ip tool ... This patch adds a private dellink function for the CAN device driver interface that does just nothing. It's a follow up to commit 993e6f2fd ("can: fix oops caused by wrong rtnl newlink usage") but for dellink. Reported-by: ajneu Signed-off-by: Oliver Hartkopp Signed-off-by: Marc Kleine-Budde Signed-off-by: Greg Kroah-Hartman

can: fix handling of unmodifiable configuration options fix

2016-08-10T08:21:03+00:00

commit bce271f255dae8335dc4d2ee2c4531e09cc67f5a upstream. With upstream commit bb208f144cf3f59 (can: fix handling of unmodifiable configuration options) a new can_validate() function was introduced. When invoking 'ip link set can0 type can' without any configuration data can_validate() tries to validate the content without taking into account that there's totally no content. This patch adds a check for missing content. Reported-by: ajneu Signed-off-by: Oliver Hartkopp Signed-off-by: Marc Kleine-Budde Signed-off-by: Greg Kroah-Hartman

can: at91_can: RX queue could get stuck at high bus load

2016-08-10T08:21:03+00:00

commit 43200a4480cbbe660309621817f54cbb93907108 upstream. At high bus load it could happen that "at91_poll()" enters with all RX message boxes filled up. If then at the end the "quota" is exceeded as well, "rx_next" will not be reset to the first RX mailbox and hence the interrupts remain disabled. Signed-off-by: Wolfgang Grandegger Tested-by: Amr Bekhit Signed-off-by: Marc Kleine-Budde Signed-off-by: Greg Kroah-Hartman

cdc_ncm: workaround for EM7455 "silent" data interface

2016-07-27T16:55:49+00:00

[ Upstream commit c086e7096170390594c425114d98172bc9aceb8a ] Several Lenovo users have reported problems with their Sierra Wireless EM7455 modem. The driver has loaded successfully and the MBIM management channel has appeared to work, including establishing a connection to the mobile network. But no frames have been received over the data interface. The problem affects all EM7455 and MC7455, and is assumed to affect other modems based on the same Qualcomm chipset and baseband firmware. Testing narrowed the problem down to what seems to be a firmware timing bug during initialization. Adding a short sleep while probing is sufficient to make the problem disappear. Experiments have shown that 1-2 ms is too little to have any effect, while 10-20 ms is enough to reliably succeed. Reported-by: Stefan Armbruster Reported-by: Ralph Plawetzki Reported-by: Andreas Fett Reported-by: Rasmus Lerdorf Reported-by: Samo Ratnik Reported-and-tested-by: Aleksander Morgado Signed-off-by: Bjørn Mork Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman

mac80211_hwsim: Add missing check for HWSIM_ATTR_SIGNAL

2016-07-27T16:55:48+00:00

commit 62397da50bb20a6b812c949ef465d7e69fe54bb6 upstream. A wmediumd that does not send this attribute causes a NULL pointer dereference, as the attribute is accessed even if it does not exist. The attribute was required but never checked ever since userspace frame forwarding has been introduced. The issue gets more problematic once we allow wmediumd registration from user namespaces. Fixes: 7882513bacb1 ("mac80211_hwsim driver support userspace frame tx/rx") Signed-off-by: Martin Willi Signed-off-by: Johannes Berg Signed-off-by: Greg Kroah-Hartman

net: alx: Work around the DMA RX overflow issue

2016-07-27T16:55:47+00:00

[ Upstream commit 881d0327db37ad917a367c77aff1afa1ee41e0a9 ] Note: This is a verified backported patch for stable 4.4 kernel, and it could also be applied to 4.3/4.2/4.1/3.18/3.16 There is a problem with alx devices, that the network link will be lost in 1-5 minutes after the device is up. >From debugging without datasheet, we found the error always happen when the DMA RX address is set to 0x....fc0, which is very likely to be a HW/silicon problem. This patch will apply rx skb with 64 bytes longer space, and if the allocated skb has a 0x...fc0 address, it will use skb_resever(skb, 64) to advance the address, so that the RX overflow can be avoided. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=70761 Signed-off-by: Feng Tang Suggested-by: Eric Dumazet Tested-by: Ole Lukoie Signed-off-by: Greg Kroah-Hartman

sfc: on MC reset, clear PIO buffer linkage in TXQs

2016-06-24T17:15:28+00:00

[ Upstream commit c0795bf64cba4d1b796fdc5b74b33772841ed1bb ] Otherwise, if we fail to allocate new PIO buffers, our TXQs will try to use the old ones, which aren't there any more. Fixes: 183233bec810 "sfc: Allocate and link PIO buffers; map them with write-combining" Signed-off-by: Edward Cree Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman

rtlwifi: Fix logic error in enter/exit power-save mode

2016-06-08T00:21:58+00:00

commit 873ffe154ae074c46ed2d72dbd9a2a99f06f55b4 upstream. In commit a269913c52ad ("rtlwifi: Rework rtl_lps_leave() and rtl_lps_enter() to use work queue"), the tests for enter/exit power-save mode were inverted. With this change applied, the wifi connection becomes much more stable. Fixes: a269913c52ad ("rtlwifi: Rework rtl_lps_leave() and rtl_lps_enter() to use work queue") Signed-off-by: Wang YanQing Acked-by: Larry Finger Signed-off-by: Kalle Valo Signed-off-by: Greg Kroah-Hartman

ath5k: Change led pin configuration for compaq c700 laptop

2016-06-08T00:21:57+00:00

commit 7b9bc799a445aea95f64f15e0083cb19b5789abe upstream. BugLink: http://bugs.launchpad.net/bugs/972604 Commit 09c9bae26b0d3c9472cb6ae45010460a2cee8b8d ("ath5k: add led pin configuration for compaq c700 laptop") added a pin configuration for the Compaq c700 laptop. However, the polarity of the led pin is reversed. It should be red for wifi off and blue for wifi on, but it is the opposite. This bug was reported in the following bug report: http://pad.lv/972604 Fixes: 09c9bae26b0d3c9472cb6ae45010460a2cee8b8d ("ath5k: add led pin configuration for compaq c700 laptop") Signed-off-by: Joseph Salisbury Signed-off-by: Kalle Valo Signed-off-by: Greg Kroah-Hartman