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Message-ID: <5476EEEA.7040001@broadcom.com> Date: Thu, 27 Nov 2014 10:29:14 +0100 From: Arend van Spriel <arend@...adcom.com> To: Takashi Iwai <tiwai@...e.de> CC: Mihai Donțu <mihai.dontu@...il.com>, <linux-kernel@...r.kernel.org>, Dave Jones <davej@...hat.com>, <pgynther@...gle.com>, <marcel@...tmann.org>, <linux-bluetooth@...r.kernel.org> Subject: Re: bluetooth related firmware loader spew on resume. On 11/27/14 10:17, Takashi Iwai wrote: > At Thu, 27 Nov 2014 09:59:12 +0100, > Arend van Spriel wrote: >> >> On 11/26/14 19:13, Takashi Iwai wrote: >>> At Wed, 26 Nov 2014 18:42:46 +0100, >>> Arend van Spriel wrote: >>>> >>>> On 11/26/14 16:27, Takashi Iwai wrote: >>>>> At Wed, 26 Nov 2014 17:26:15 +0200, >>>>> Mihai Donțu wrote: >>>>>> >>>>>> On Wed, 26 Nov 2014 16:19:49 +0100 >>>>>> Takashi Iwai<tiwai@...e.de> wrote: >>>>>> >>>>>>> At Wed, 26 Nov 2014 16:56:09 +0200, >>>>>>> Mihai Donțu wrote: >>>>>>>> >>>>>>>> On Tue, 11 Nov 2014 13:12:28 -0500 Dave Jones wrote: >>>>>>>>> Since the addition of 10d4c6736ea "Bluetooth: btusb: Add Broadcom patch >>>>>>>>> RAM support", I (and a number of other people[*]) have been seeing >>>>>>>>> this trace on resume from suspend. >>>>>>>>> >>>>>>>>> WARNING: CPU: 1 PID: 8565 at drivers/base/firmware_class.c:1127 _request_firmware+0x4c1/0x7c0() >>>>>>>>> CPU: 1 PID: 8565 Comm: kworker/u17:0 Not tainted 3.17.2-200.fc20.x86_64 #1 >>>>>>>>> Hardware name: LENOVO 2356JK8/2356JK8, BIOS G7ET94WW (2.54 ) 04/30/2013 >>>>>>>>> Workqueue: hci0 hci_power_on [bluetooth] >>>>>>>>> 0000000000000000 00000000f52a564b ffff8800a8c63be8 ffffffff817271cc >>>>>>>>> 0000000000000000 ffff8800a8c63c20 ffffffff81094ced ffff8800a8c63d10 >>>>>>>>> ffff8801365ddf00 ffff8801387b4b00 ffff8800a8c63d08 00000000fffffff5 >>>>>>>>> Call Trace: >>>>>>>>> [<ffffffff817271cc>] dump_stack+0x45/0x56 >>>>>>>>> [<ffffffff81094ced>] warn_slowpath_common+0x7d/0xa0 >>>>>>>>> [<ffffffff81094e1a>] warn_slowpath_null+0x1a/0x20 >>>>>>>>> [<ffffffff814965c1>] _request_firmware+0x4c1/0x7c0 >>>>>>>>> [<ffffffff8137b9b9>] ? snprintf+0x49/0x70 >>>>>>>>> [<ffffffff814968f1>] request_firmware+0x31/0x50 >>>>>>>>> [<ffffffffa0943bf3>] btusb_setup_bcm_patchram+0x83/0x550 [btusb] >>>>>>>>> [<ffffffff8148ecf6>] ? rpm_idle+0xd6/0x2b0 >>>>>>>>> [<ffffffffa0649051>] hci_dev_do_open+0xe1/0xa60 [bluetooth] >>>>>>>>> ACPI: \_SB_.PCI0.LPC_.EC__.BAT1: docking >>>>>>>>> Restarting tasks ... >>>>>>>>> [<ffffffff810bcb3d>] ? ttwu_do_activate.constprop.90+0x5d/0x70 >>>>>>>>> [<ffffffffa064a1c0>] hci_power_on+0x40/0x1e0 [bluetooth] >>>>>>>>> [<ffffffff810f53fb>] ? lock_timer_base.isra.34+0x2b/0x50 >>>>>>>>> [<ffffffff810acc39>] process_one_work+0x149/0x3d0 >>>>>>>>> [<ffffffff810ad2bb>] worker_thread+0x11b/0x490 >>>>>>>>> [<ffffffff810ad1a0>] ? rescuer_thread+0x2e0/0x2e0 >>>>>>>>> [<ffffffff810b2318>] kthread+0xd8/0xf0 >>>>>>>>> [<ffffffff810b2240>] ? kthread_create_on_node+0x190/0x190 >>>>>>>>> [<ffffffff8172e7bc>] ret_from_fork+0x7c/0xb0 >>>>>>>>> [<ffffffff810b2240>] ? kthread_create_on_node+0x190/0x190 >>>>>>>>> ---[ end trace 75a0e9c7f33ebb4c ]--- >>>>>>>>> bluetooth hci0: firmware: brcm/BCM20702A0-0a5c-21e6.hcd will not be loaded >>>>>>>>> Bluetooth: hci0: BCM: patch brcm/BCM20702A0-0a5c-21e6.hcd not found >>>>>>>>> >>>>>>>>> >>>>>>>>> At first I thought it was just over-reaction to the file being missing, but >>>>>>>>> looking at the WARN_ON, it appears that we're trying to invoke the firmware >>>>>>>>> loader before userspace is back up ? >>>>>>>>> >>>>>>>>> In this (and probably other related) kernel, CONFIG_FW_LOADER_USER_HELPER is unset, >>>>>>>>> in case that matters at all. >>>>>>>>> >>>>>>>>> Dave >>>>>>>>> >>>>>>>>> [*] https://bugzilla.kernel.org/show_bug.cgi?id=81821 >>>>>>>>> https://bugzilla.redhat.com/show_bug.cgi?id=1133378 >>>>>>>> >>>>>>>> I have the following during normal boot: >>>>>>>> >>>>>>>> [ 5.620796] Bluetooth: hci0: read Intel version: 370710018002030d00 >>>>>>>> [ 5.620822] bluetooth hci0: Direct firmware load for intel/ibt-hw-37.7.10-fw-1.80.2.3.d.bseq failed with error -2 >>>>>>>> [ 5.620827] Bluetooth: hci0 failed to open Intel firmware file: intel/ibt-hw-37.7.10-fw-1.80.2.3.d.bseq(-2) >>>>>>>> [ 5.620920] bluetooth hci0: Direct firmware load for intel/ibt-hw-37.7.bseq failed with error -2 >>>>>>>> [ 5.620922] Bluetooth: hci0 failed to open default Intel fw file: intel/ibt-hw-37.7.bseq >>>>>>>> [ 5.629910] EXT4-fs (sda2): mounted filesystem with ordered data mode. Opts: (null) >>>>>>>> [ 5.629916] VFS: Mounted root (ext4 filesystem) readonly on device 8:2. >>>>>>>> >>>>>>>> The driver is trying to load the firmware before root is mounted. Do I >>>>>>>> really need an initramfs? >>>>>>> >>>>>>> If btusb driver is loaded in initrd, you'd need the corresponding >>>>>>> firmware in initrd, too. >>>>>> >>>>>> The driver is built into the kernel and I don't use an initrd. I could >>>>>> probably create one, but it's a bit tricky with UEFI and a tad harder >>>>>> to maintain. >>>>> >>>>> Then you can build the firmware file into kernel, too. >>>> >>>> huh? The whole idea of the firmware API was to keep (often proprietary) >>>> firmware out of the kernel. Has that strategy been abandoned recently? >>> >>> See CONFIG_EXTRA_FIRMARE. It doesn't mean to include the binary blob >>> into the kernel source tree. It just allows to *build* into your >>> kernel. >> >> I see. Thanks for the info. I still do not understand the resume >> scenario. I though firmware api did some sort of caching of the firmware >> images. > > My theory is that this is triggered when the firmware file doesn't > exist. Then it's neither remembered nor cached, so it's retried in > the resume path. But the information is missing, so I cannot say > surely about it. Agree. So the same warning should have occurred upon system boot. Maybe Mihai can confirm that. Regards, Arend > > Takashi -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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