From: Kweh Hock Leong <hock.leong.kweh@intel.com>
To: Matt Fleming <matt.fleming@intel.com>,
Ming Lei <ming.lei@canonical.com>,
Sam Protsenko <semen.protsenko@linaro.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
LKML <linux-kernel@vger.kernel.org>,
linux-efi@vger.kernel.org,
Ong Boon Leong <boon.leong.ong@intel.com>,
Kweh Hock Leong <hock.leong.kweh@intel.com>
Subject: [PATCH v2 2/3] firmware loader: fix hung task warning dump
Date: Mon, 3 Nov 2014 11:07:09 +0800 [thread overview]
Message-ID: <1414984030-13859-3-git-send-email-hock.leong.kweh@intel.com> (raw)
In-Reply-To: <1414984030-13859-1-git-send-email-hock.leong.kweh@intel.com>
From: "Kweh, Hock Leong" <hock.leong.kweh@intel.com>
When using request_firmware_nowait() with FW_ACTION_NOHOTPLUG param to
expose user helper interface, if the user do not react immediately, after
120 seconds there will be a hung task warning message dumped as below:
[ 3000.784235] INFO: task kworker/0:0:8259 blocked for more than 120 seconds.
[ 3000.791281] Tainted: G E 3.16.0-rc1-yocto-standard #41
[ 3000.798082] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 3000.806072] kworker/0:0 D cd0075c8 0 8259 2 0x00000000
[ 3000.812765] Workqueue: events request_firmware_work_func
[ 3000.818253] cd375e18 00000046 0000000e cd0075c8 000000f0 cd40ea00 cd375fec 1b883e89
[ 3000.826374] 0000026b cd40ea00 80000000 00000001 cd0075c8 00000000 cd375de4 c119917f
[ 3000.834492] cd563360 cd375df4 c119a0ab cd563360 00000000 cd375e24 c119a1d6 00000000
[ 3000.842616] Call Trace:
[ 3000.845252] [<c119917f>] ? kernfs_next_descendant_post+0x3f/0x50
[ 3000.851543] [<c119a0ab>] ? kernfs_activate+0x6b/0xc0
[ 3000.856790] [<c119a1d6>] ? kernfs_add_one+0xd6/0x130
[ 3000.862047] [<c15fdb02>] schedule+0x22/0x60
[ 3000.866548] [<c15fd195>] schedule_timeout+0x175/0x1d0
[ 3000.871887] [<c119b391>] ? __kernfs_create_file+0x71/0xa0
[ 3000.877574] [<c119bb9a>] ? sysfs_add_file_mode_ns+0xaa/0x180
[ 3000.883533] [<c15fe84f>] wait_for_completion+0x6f/0xb0
[ 3000.888961] [<c1065200>] ? wake_up_process+0x40/0x40
[ 3000.894219] [<c13cb600>] _request_firmware+0x750/0x9f0
[ 3000.899666] [<c1382a7f>] ? n_tty_receive_buf2+0x1f/0x30
[ 3000.905200] [<c13cba02>] request_firmware_work_func+0x22/0x50
[ 3000.911235] [<c10550d2>] process_one_work+0x122/0x380
[ 3000.916571] [<c1055859>] worker_thread+0xf9/0x470
[ 3000.921555] [<c1055760>] ? create_and_start_worker+0x50/0x50
[ 3000.927497] [<c1055760>] ? create_and_start_worker+0x50/0x50
[ 3000.933448] [<c105a5ff>] kthread+0x9f/0xc0
[ 3000.937850] [<c15ffd40>] ret_from_kernel_thread+0x20/0x30
[ 3000.943548] [<c105a560>] ? kthread_worker_fn+0x100/0x100
This patch change the wait_for_completion() function call to
wait_for_completion_interruptible() function call for solving the issue.
Cc: Matt Fleming <matt.fleming@intel.com>
Signed-off-by: Kweh, Hock Leong <hock.leong.kweh@intel.com>
---
drivers/base/firmware_class.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c
index a238a46..639eeff 100644
--- a/drivers/base/firmware_class.c
+++ b/drivers/base/firmware_class.c
@@ -908,7 +908,7 @@ static int _request_firmware_load(struct firmware_priv *fw_priv,
kobject_uevent(&fw_priv->dev.kobj, KOBJ_ADD);
}
- wait_for_completion(&buf->completion);
+ retval = wait_for_completion_interruptible(&buf->completion);
cancel_delayed_work_sync(&fw_priv->timeout_work);
if (!buf->data)
@@ -985,7 +985,7 @@ static int sync_cached_firmware_buf(struct firmware_buf *buf)
break;
}
mutex_unlock(&fw_lock);
- wait_for_completion(&buf->completion);
+ ret = wait_for_completion_interruptible(&buf->completion);
mutex_lock(&fw_lock);
}
mutex_unlock(&fw_lock);
--
1.7.9.5
next prev parent reply other threads:[~2014-11-03 3:04 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-03 3:07 [PATCH v2 0/3] Enable user helper interface for efi capsule update Kweh Hock Leong
2014-11-03 3:07 ` [PATCH v2 1/3] firmware loader: Introduce new API - request_firmware_abort() Kweh Hock Leong
2014-11-03 10:15 ` Henrique de Moraes Holschuh
2014-11-03 12:07 ` Matt Fleming
2014-11-08 19:06 ` Greg Kroah-Hartman
2014-11-13 2:51 ` Kweh, Hock Leong
2014-11-17 15:12 ` Matt Fleming
2014-11-18 6:31 ` Kweh, Hock Leong
2014-11-19 2:05 ` Greg Kroah-Hartman
2014-11-03 3:07 ` Kweh Hock Leong [this message]
2014-11-08 19:07 ` [PATCH v2 2/3] firmware loader: fix hung task warning dump Greg Kroah-Hartman
2014-11-03 3:07 ` [PATCH v2 3/3] efi: Capsule update with user helper interface Kweh Hock Leong
2014-11-04 4:32 ` Greg Kroah-Hartman
2014-11-04 5:20 ` Andy Lutomirski
2014-11-04 6:04 ` Kweh, Hock Leong
2014-11-04 6:32 ` Andy Lutomirski
2014-11-04 8:03 ` Kweh, Hock Leong
2014-11-04 14:18 ` Matt Fleming
2014-11-04 14:57 ` Andy Lutomirski
2014-11-04 15:40 ` Greg KH
2014-11-04 16:35 ` Andy Lutomirski
2014-11-06 12:53 ` Kweh, Hock Leong
2014-11-06 16:52 ` Andy Lutomirski
2014-11-10 8:31 ` Kweh, Hock Leong
2014-11-10 19:31 ` Andy Lutomirski
2014-11-08 13:05 ` Matt Fleming
2014-11-08 15:54 ` Andy Lutomirski
2015-02-27 5:06 ` Roy Franz
2015-02-27 11:35 ` Kweh, Hock Leong
2014-11-03 19:33 ` [PATCH v2 0/3] Enable user helper interface for efi capsule update Andy Lutomirski
2014-11-03 21:27 ` Greg Kroah-Hartman
2014-11-03 21:32 ` Andy Lutomirski
2014-11-03 23:02 ` Greg Kroah-Hartman
2014-11-03 23:08 ` Andy Lutomirski
2014-11-04 0:38 ` Greg Kroah-Hartman
2014-11-04 1:14 ` Andy Lutomirski
2014-11-04 14:07 ` Matt Fleming
2014-11-05 9:52 ` Kweh, Hock Leong
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1414984030-13859-3-git-send-email-hock.leong.kweh@intel.com \
--to=hock.leong.kweh@intel.com \
--cc=boon.leong.ong@intel.com \
--cc=gregkh@linuxfoundation.org \
--cc=linux-efi@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=matt.fleming@intel.com \
--cc=ming.lei@canonical.com \
--cc=semen.protsenko@linaro.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).