Drop firwmare warning until we get a real fix (rhbz 1133378)

firmware-Drop-WARN-from-usermodehelper_read_trylock-.patch

@@ -0,0 +1,89 @@
+From: Laura Abbott <labbott@fedoraproject.org>
+Date: Tue, 28 Apr 2015 15:37:44 -0700
+Subject: [PATCH] firmware: Drop WARN from usermodehelper_read_trylock error
+ case
+
+We've received a number of reports of warnings when coming
+out of suspend with certain bluetooth firmware configurations:
+
+WARNING: CPU: 3 PID: 3280 at drivers/base/firmware_class.c:1126
+_request_firmware+0x558/0x810()
+Modules linked in: ccm ip6t_rpfilter ip6t_REJECT nf_reject_ipv6
+xt_conntrack ebtable_nat ebtable_broute bridge stp llc ebtable_filter
+ebtables ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6
+ip6table_mangle ip6table_security ip6table_raw ip6table_filter
+ip6_tables iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4
+nf_nat nf_conntrack iptable_mangle iptable_security iptable_raw
+binfmt_misc bnep intel_rapl iosf_mbi arc4 x86_pkg_temp_thermal
+snd_hda_codec_hdmi coretemp kvm_intel joydev snd_hda_codec_realtek
+iwldvm snd_hda_codec_generic kvm iTCO_wdt mac80211 iTCO_vendor_support
+snd_hda_intel snd_hda_controller snd_hda_codec crct10dif_pclmul
+snd_hwdep crc32_pclmul snd_seq crc32c_intel ghash_clmulni_intel uvcvideo
+snd_seq_device iwlwifi btusb videobuf2_vmalloc snd_pcm videobuf2_core
+ serio_raw bluetooth cfg80211 videobuf2_memops sdhci_pci v4l2_common
+videodev thinkpad_acpi sdhci i2c_i801 lpc_ich mfd_core wacom mmc_core
+media snd_timer tpm_tis hid_logitech_hidpp wmi tpm rfkill snd mei_me mei
+shpchp soundcore nfsd auth_rpcgss nfs_acl lockd grace sunrpc i915
+i2c_algo_bit drm_kms_helper e1000e drm hid_logitech_dj ptp pps_core
+video
+CPU: 3 PID: 3280 Comm: kworker/u17:0 Not tainted 3.19.3-200.fc21.x86_64
+Hardware name: LENOVO 343522U/343522U, BIOS GCET96WW (2.56 ) 10/22/2013
+Workqueue: hci0 hci_power_on [bluetooth]
+ 0000000000000000 0000000089944328 ffff88040acffb78 ffffffff8176e215
+ 0000000000000000 0000000000000000 ffff88040acffbb8 ffffffff8109bc1a
+ 0000000000000000 ffff88040acffcd0 00000000fffffff5 ffff8804076bac40
+Call Trace:
+ [<ffffffff8176e215>] dump_stack+0x45/0x57
+ [<ffffffff8109bc1a>] warn_slowpath_common+0x8a/0xc0
+ [<ffffffff8109bd4a>] warn_slowpath_null+0x1a/0x20
+ [<ffffffff814dbe78>] _request_firmware+0x558/0x810
+ [<ffffffff814dc165>] request_firmware+0x35/0x50
+ [<ffffffffa03a7886>] btusb_setup_bcm_patchram+0x86/0x590 [btusb]
+ [<ffffffff814d40e6>] ? rpm_idle+0xd6/0x230
+ [<ffffffffa04d4801>] hci_dev_do_open+0xe1/0xa90 [bluetooth]
+ [<ffffffff810c51dd>] ? ttwu_do_activate.constprop.90+0x5d/0x70
+ [<ffffffffa04d5980>] hci_power_on+0x40/0x200 [bluetooth]
+ [<ffffffff810b487c>] process_one_work+0x14c/0x3f0
+ [<ffffffff810b52f3>] worker_thread+0x53/0x470
+ [<ffffffff810b52a0>] ? rescuer_thread+0x300/0x300
+ [<ffffffff810ba548>] kthread+0xd8/0xf0
+ [<ffffffff810ba470>] ? kthread_create_on_node+0x1b0/0x1b0
+ [<ffffffff81774958>] ret_from_fork+0x58/0x90
+ [<ffffffff810ba470>] ? kthread_create_on_node+0x1b0/0x1b0
+
+This occurs after every resume.
+
+When resuming, the bluetooth driver needs to re-request the
+firmware. This re-request is happening before usermodehelper
+is fully enabled. If the firmware load succeeded previously, the
+caching behavior of the firmware code typically negates the
+need to call the usermodehelper code again and the request
+succeeds. If the firmware was never loaded because it isn't
+actually present in the file system, this results in a call
+to usermodehelper and a failure warning every resume.
+
+The proper fix is to add a reset_resume functionality to the
+btusb driver to be able to handle the resume case. The
+work for this is ongoing so in the mean time just silence
+the warning since we know it's a problem.
+
+Bugzilla: 1133378
+Upstream-status: Working on it. It's a difficult problem :(
+Signed-off-by: Laura Abbott <labbott@fedoraproject.org>
+---
+ drivers/base/firmware_class.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c
+index 171841ad1008..48ce9acf04c4 100644
+--- a/drivers/base/firmware_class.c
++++ b/drivers/base/firmware_class.c
+@@ -1115,7 +1115,7 @@ _request_firmware(const struct firmware **firmware_p, const char *name,
+ 		}
+ 	} else {
+ 		ret = usermodehelper_read_trylock();
+-		if (WARN_ON(ret)) {
++		if (ret) {
+ 			dev_err(device, "firmware: %s will not be loaded\n",
+ 				name);
+ 			goto out;

kernel.spec

@@ -612,6 +612,9 @@ Patch26215: HID-lenovo-set-INPUT_PROP_POINTING_STICK.patch
 #rhbz 1188695
 Patch26218: n_tty-Fix-auditing-support-for-cannonical-mode.patch
 
+#rhbz 1133378
+Patch26219: firmware-Drop-WARN-from-usermodehelper_read_trylock-.patch
+
 # END OF PATCH DEFINITIONS
 
 %endif
@@ -1342,6 +1345,9 @@ ApplyPatch HID-lenovo-set-INPUT_PROP_POINTING_STICK.patch
 #rhbz 1188695
 ApplyPatch n_tty-Fix-auditing-support-for-cannonical-mode.patch
 
+#rhbz 1133378
+ApplyPatch firmware-Drop-WARN-from-usermodehelper_read_trylock-.patch
+
 # END OF PATCH APPLICATIONS
 
 %endif
@@ -2206,6 +2212,9 @@ fi
 #
 # 
 %changelog
+* Wed Jun 03 2015 Laura Abbott <labbott@fedoraproject.org>
+- Drop that blasted firwmare warning until we get a real fix (rhbz 1133378)
+
 * Wed Jun 03 2015 Laura Abbott <labbott@fedoraproject.org>
 - Fix auditing of canonical mode (rhbz 1188695)