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Groups > linux.kernel > #1344078

[PATCH 3.16.y-ckt 085/129] Revert "xhci: don't finish a TD if we get a short-transfer event mid TD"

From Luis Henriques <luis.henriques@canonical.com>
Newsgroups linux.kernel
Subject [PATCH 3.16.y-ckt 085/129] Revert "xhci: don't finish a TD if we get a short-transfer event mid TD"
Date 2016-02-26 11:50 +0100
Message-ID <r6o8b-1Sy-39@gated-at.bofh.it> (permalink)
References <r6nOO-1Jb-5@gated-at.bofh.it>
Organization linux.* mail to news gateway

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3.16.7-ckt25 -stable review patch.  If anyone has any objections, please let me know.

---8<------------------------------------------------------------

From: Mathias Nyman <mathias.nyman@linux.intel.com>

commit a6835090716a85f2297668ba593bd00e1051e662 upstream.

This reverts commit e210c422b6fd ("xhci: don't finish a TD if we get a
short transfer event mid TD")

Turns out that most host controllers do not follow the xHCI specs and never
send the second event for the last TRB in the TD if there was a short event
mid-TD.

Returning the URB directly after the first short-transfer event is far
better than never returning the URB. (class drivers usually timeout
after 30sec). For the hosts that do send the second event we will go
back to treating it as misplaced event and print an error message for it.

The origial patch was sent to stable kernels and needs to be reverted from
there as well

Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[ luis: backported to 3.16: adjusted context ]
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/usb/host/xhci-ring.c | 10 ----------
 1 file changed, 10 deletions(-)

diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index 22c9bca66569..f15e2df4448c 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -2192,10 +2192,6 @@ static int process_bulk_intr_td(struct xhci_hcd *xhci, struct xhci_td *td,
 				EVENT_TRB_LEN(le32_to_cpu(event->transfer_len)));
 	/* Fast path - was this the last TRB in the TD for this URB? */
 	if (event_trb == td->last_trb) {
-		if (td->urb_length_set && trb_comp_code == COMP_SHORT_TX)
-			return finish_td(xhci, td, event_trb, event, ep,
-					 status, false);
-
 		if (EVENT_TRB_LEN(le32_to_cpu(event->transfer_len)) != 0) {
 			td->urb->actual_length =
 				td->urb->transfer_buffer_length -
@@ -2247,12 +2243,6 @@ static int process_bulk_intr_td(struct xhci_hcd *xhci, struct xhci_td *td,
 			td->urb->actual_length +=
 				TRB_LEN(le32_to_cpu(cur_trb->generic.field[2])) -
 				EVENT_TRB_LEN(le32_to_cpu(event->transfer_len));
-
-		if (trb_comp_code == COMP_SHORT_TX) {
-			xhci_dbg(xhci, "mid bulk/intr SP, wait for last TRB event\n");
-			td->urb_length_set = true;
-			return 0;
-		}
 	}
 
 	return finish_td(xhci, td, event_trb, event, ep, status, false);

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[3.16.y-ckt stable] Linux 3.16.7-ckt25 stable review Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 11:30 +0100
  [PATCH 3.16.y-ckt 117/129] ARM: 8519/1: ICST: try other dividends than 1 Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 11:30 +0100
  [PATCH 3.16.y-ckt 107/129] klist: fix starting point removed bug in klist iterators Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 11:40 +0100
  [PATCH 3.16.y-ckt 126/129] sctp: translate network order to host order when users get a hmacid Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 11:40 +0100
  [PATCH 3.16.y-ckt 109/129] ALSA: timer: Fix wrong instance passed to slave callbacks Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 11:40 +0100
  [PATCH 3.16.y-ckt 123/129] netlink: not trim skb for mmaped socket when dump Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 11:40 +0100
  [PATCH 3.16.y-ckt 108/129] ALSA: dummy: Implement timer backend switching more safely Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 11:40 +0100
  [PATCH 3.16.y-ckt 106/129] ALSA: hda - Fix speaker output from VAIO AiO machines Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 11:40 +0100
  [PATCH 3.16.y-ckt 100/129] mm: replace vma_lock_anon_vma with anon_vma_lock_read/write Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 11:40 +0100
  [PATCH 3.16.y-ckt 099/129] ocfs2/dlm: clear refmap bit of recovery lock while doing local recovery cleanup Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 11:40 +0100
  [PATCH 3.16.y-ckt 122/129] sctp: allow setting SCTP_SACK_IMMEDIATELY by the application Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 11:40 +0100
  [PATCH 3.16.y-ckt 115/129] workqueue: handle NUMA_NO_NODE for unbound pool_workqueue lookup Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 11:40 +0100
  [PATCH 3.16.y-ckt 111/129] ALSA: timer: Fix race between stop and interrupt Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 11:40 +0100
  [PATCH 3.16.y-ckt 125/129] ipv6: fix a lockdep splat Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 11:40 +0100
  [PATCH 3.16.y-ckt 110/129] ARM: 8517/1: ICST: avoid arithmetic overflow in icst_hz() Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 11:40 +0100
  [PATCH 3.16.y-ckt 120/129] af_unix: fix struct pid memory leak Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 11:40 +0100
  [PATCH 3.16.y-ckt 096/129] Revert "ALSA: hda - Fix noise on Gigabyte Z170X mobo" Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 11:50 +0100
  [PATCH 3.16.y-ckt 093/129] SCSI: Add Marvell Console to VPD blacklist Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 11:50 +0100
  [PATCH 3.16.y-ckt 084/129] radix-tree: fix race in gang lookup Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 11:50 +0100
  [PATCH 3.16.y-ckt 077/129] ASoC: dpcm: fix the BE state on hw_free Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 11:50 +0100
  [PATCH 3.16.y-ckt 094/129] drm: Add drm_fixp_from_fraction and drm_fixp2int_ceil Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 11:50 +0100
  [PATCH 3.16.y-ckt 087/129] xhci: Fix list corruption in urb dequeue at host removal Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 11:50 +0100
  [PATCH 3.16.y-ckt 098/129] mm, vmstat: fix wrong WQ sleep when memory reclaim doesn't make any progress Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 11:50 +0100
  [PATCH 3.16.y-ckt 088/129] [media] tda1004x: only update the frontend properties if locked Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 11:50 +0100
  [PATCH 3.16.y-ckt 083/129] drivers/scsi/sg.c: mark VMA as VM_IO to prevent migration Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 11:50 +0100
  [PATCH 3.16.y-ckt 090/129] [media] saa7134-alsa: Only frees registered sound cards Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 11:50 +0100
  [PATCH 3.16.y-ckt 095/129] ALSA: hda - Fix static checker warning in patch_hdmi.c Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 11:50 +0100
  [PATCH 3.16.y-ckt 078/129] module: wrapper for symbol name. Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 11:50 +0100
  [PATCH 3.16.y-ckt 085/129] Revert "xhci: don't finish a TD if we get a short-transfer event mid TD" Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 11:50 +0100
  [PATCH 3.16.y-ckt 104/129] pty: fix possible use after free of tty->driver_data Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 11:50 +0100
  [PATCH 3.16.y-ckt 097/129] dump_stack: avoid potential deadlocks Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 11:50 +0100
  [PATCH 3.16.y-ckt 103/129] serial: omap: Prevent DoS using unprivileged ioctl(TIOCSRS485) Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 11:50 +0100
  [PATCH 3.16.y-ckt 086/129] usb: xhci: apply XHCI_PME_STUCK_QUIRK to Intel Broxton-M platforms Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 11:50 +0100
  [PATCH 3.16.y-ckt 076/129] cputime: Prevent 32bit overflow in time[val|spec]_to_cputime() Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 11:50 +0100
  [PATCH 3.16.y-ckt 092/129] scsi_dh_rdac: always retry MODE SELECT on command lock violation Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 11:50 +0100
  [PATCH 3.16.y-ckt 102/129] crypto: user - lock crypto_alg_list on alg dump Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 11:50 +0100
  [PATCH 3.16.y-ckt 072/129] ALSA: timer: Code cleanup Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 11:50 +0100
  [PATCH 3.16.y-ckt 082/129] ALSA: seq: Fix lockdep warnings due to double mutex locks Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 11:50 +0100
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  [PATCH 3.16.y-ckt 101/129] radix-tree: fix oops after radix_tree_iter_retry Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 11:50 +0100
  [PATCH 3.16.y-ckt 074/129] libata: fix sff host state machine locking while polling Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 11:50 +0100
  [PATCH 3.16.y-ckt 069/129] ALSA: rawmidi: Remove kernel WARNING for NULL user-space buffer check Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 11:50 +0100
  [PATCH 3.16.y-ckt 073/129] ALSA: timer: Fix link corruption due to double start or stop Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 11:50 +0100
  [PATCH 3.16.y-ckt 091/129] Btrfs: fix hang on extent buffer lock caused by the inode_paths ioctl Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 11:50 +0100
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  [PATCH 3.16.y-ckt 045/129] crypto: algif_skcipher - Add nokey compatibility path Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:00 +0100
  [PATCH 3.16.y-ckt 046/129] crypto: algif_hash - Require setkey before accept(2) Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:00 +0100
  [PATCH 3.16.y-ckt 067/129] intel_scu_ipcutil: underflow in scu_reg_access() Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:00 +0100
  [PATCH 3.16.y-ckt 056/129] cgroup: make sure a parent css isn't offlined before its children Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:00 +0100
  [PATCH 3.16.y-ckt 063/129] target: Fix WRITE_SAME/DISCARD conversion to linux 512b sectors Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:00 +0100
  [PATCH 3.16.y-ckt 060/129] rfkill: fix rfkill_fop_read wait_event usage Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:00 +0100
  [PATCH 3.16.y-ckt 044/129] crypto: algif_skcipher - Require setkey before accept(2) Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:00 +0100
  [PATCH 3.16.y-ckt 053/129] iio: add HAS_IOMEM dependency to VF610_ADC Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:00 +0100
  [PATCH 3.16.y-ckt 043/129] umount: Do not allow unmounting rootfs. Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:00 +0100
  [PATCH 3.16.y-ckt 055/129] ASoC: rt5645: fix the shift bit of IN1 boost Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:00 +0100
  [PATCH 3.16.y-ckt 048/129] crypto: algif_skcipher - Add key check exception for cipher_null Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:00 +0100
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  [PATCH 3.16.y-ckt 051/129] crypto: algif_hash - Fix race condition in hash_check_key Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:00 +0100
  [PATCH 3.16.y-ckt 050/129] crypto: algif_skcipher - Remove custom release parent function Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:00 +0100
  [PATCH 3.16.y-ckt 061/129] crypto: shash - Fix has_key setting Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:00 +0100
  [PATCH 3.16.y-ckt 062/129] drm/i915/dp: fall back to 18 bpp when sink capability is unknown Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:00 +0100
  [PATCH 3.16.y-ckt 065/129] iio: inkern: fix a NULL dereference on error Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:00 +0100
  [PATCH 3.16.y-ckt 059/129] mac80211: Requeue work after scan complete for all VIF types. Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:00 +0100
  [PATCH 3.16.y-ckt 066/129] iio: pressure: mpl115: fix temperature offset sign Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:00 +0100
  [PATCH 3.16.y-ckt 058/129] libata: disable forced PORTS_IMPL for >= AHCI 1.3 Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:00 +0100
  [PATCH 3.16.y-ckt 064/129] crypto: algif_hash - wait for crypto_ahash_init() to complete Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:00 +0100
  [PATCH 3.16.y-ckt 052/129] crypto: algif_skcipher - Fix race condition in skcipher_check_key Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:00 +0100
  [PATCH 3.16.y-ckt 042/129] Revert "workqueue: make sure delayed work run in local cpu" Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:00 +0100
  [PATCH 3.16.y-ckt 068/129] ALSA: seq: Fix race at closing in virmidi driver Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:00 +0100
  [PATCH 3.16.y-ckt 024/129] USB: serial: ftdi_sio: add support for Yaesu SCU-18 cable Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 039/129] perf hists: Fix HISTC_MEM_DCACHELINE width setting Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 020/129] USB: visor: fix null-deref at probe Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 033/129] n_tty: Fix unsafe reference to "other" ldisc Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 027/129] ALSA: usb-audio: Fix TEAC UD-501/UD-503/NT-503 usb delay Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 012/129] KVM: PPC: Fix emulation of H_SET_DABR/X on POWER8 Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 049/129] crypto: algif_hash - Remove custom release parent function Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 036/129] drm/vmwgfx: respect 'nomodeset' Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 019/129] USB: cp210x: add ID for IAI USB to RS485 adaptor Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 014/129] ACPI / PCI / hotplug: unlock in error path in acpiphp_enable_slot() Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 031/129] powerpc/eeh: Fix PE location code Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 047/129] crypto: skcipher - Add crypto_skcipher_has_setkey Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 032/129] SCSI: fix crashes in sd and sr runtime PM Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 018/129] usb: hub: do not clear BOS field during reset device Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 022/129] ALSA: seq: Fix incorrect sanity check at snd_seq_oss_synth_cleanup() Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 009/129] EVM: Use crypto_memneq() for digest comparisons Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 023/129] ALSA: seq: Degrade the error message for too many opens Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 040/129] powerpc/perf: Remove PPMU_HAS_SSLOT flag for Power8 Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 008/129] iw_cxgb3: Fix incorrectly returning error on success Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 028/129] virtio_pci: fix use after free on release Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 030/129] arm64: errata: Add -mpc-relative-literal-loads to build flags Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 010/129] ALSA: usb-audio: avoid freeing umidi object twice Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 029/129] ALSA: bebob: Use a signed return type for get_formation_index Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 015/129] usb: cdc-acm: handle unlinked urb in acm read callback Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 017/129] cdc-acm:exclude Samsung phone 04e8:685d Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 035/129] ALSA: dummy: Disable switching timer backend via sysfs Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 025/129] USB: option: fix Cinterion AHxx enumeration Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 021/129] USB: serial: option: Adding support for Telit LE922 Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 016/129] usb: cdc-acm: send zero packet for intel 7260 modem Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 034/129] staging/speakup: Use tty_ldisc_ref() for paste kworker Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 038/129] perf annotate browser: Fix behaviour of Shift-Tab with nothing focussed Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:10 +0100
  [PATCH 3.16.y-ckt 005/129] USB: serial: visor: fix crash on detecting device without write_urbs Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:20 +0100
  [PATCH 3.16.y-ckt 007/129] qeth: initialize net_device with carrier off Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:20 +0100
  [PATCH 3.16.y-ckt 011/129] iio: adis_buffer: Fix out-of-bounds memory access Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:20 +0100
  [PATCH 3.16.y-ckt 002/129] [media] usbvision: fix leak of usb_dev on failure paths in usbvision_probe() Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:20 +0100
  [PATCH 3.16.y-ckt 003/129] [media] usbvision: fix crash on detecting device with invalid configuration Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:20 +0100
  [PATCH 3.16.y-ckt 004/129] tty: Fix unsafe ldisc reference via ioctl(TIOCGETD) Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:20 +0100
  [PATCH 3.16.y-ckt 006/129] ASN.1: Fix non-match detection failure on data overrun Luis Henriques <luis.henriques@canonical.com> - 2016-02-26 12:20 +0100
  [PATCH 3.16.y-ckt 131/131] net: phy: Avoid polling PHY with PHY_IGNORE_INTERRUPTS Luis Henriques <luis.henriques@canonical.com> - 2016-02-29 12:40 +0100
  [PATCH 3.16.y-ckt 130/131] net: phy: fix PHY_RUNNING in phy_state_machine Luis Henriques <luis.henriques@canonical.com> - 2016-02-29 12:40 +0100

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