linux-kernel - [PATCH] sysfs: use sysfs_bin_attr

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Date:	Tue, 9 Mar 2010 19:30:28 +0100 (CET)
From:	Jiri Kosina <jkosina@...e.cz>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Greg Kroah-Hartman <gregkh@...e.de>
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH] sysfs: use sysfs_bin_attr_init in firmware class driver

Annotate dynamic sysfs attribute in fw_setup_device(). This gets
rid of the following lockdep warning:

bnx2 0000:08:00.0: firmware: requesting bnx2/bnx2-mips-06-5.0.0.j6.fw
BUG: key ffff880008293470 not in .data!
------------[ cut here ]------------
WARNING: at kernel/lockdep.c:2706 lockdep_init_map+0x562/0x620()
Modules linked in: bnx2(+) sg tpm_bios floppy rtc_lib usb_storage i2c_piix4 joydev button container shpchp i2c_core sr_mod cdrom pci_hotplug usbhid hid ohci_hcd ehci_hcd sd_mod usbcore edd ext3 mbcache jbd fan ata_generic sata_svw pata_serverworks libata scsi_mod thermal processor
Pid: 1915, comm: work_for_cpu Not tainted 2.6.34-rc1-default #81
Call Trace:
 [<ffffffff8107c1d2>] ? lockdep_init_map+0x562/0x620
 [<ffffffff81049fd8>] warn_slowpath_common+0x78/0xd0
 [<ffffffff8104a03f>] warn_slowpath_null+0xf/0x20
 [<ffffffff8107c1d2>] lockdep_init_map+0x562/0x620
 [<ffffffff8117a236>] ? sysfs_new_dirent+0x76/0x120
 [<ffffffff8126edb2>] ? put_device+0x12/0x20
 [<ffffffff811797cc>] sysfs_add_file_mode+0x6c/0xd0
 [<ffffffff8117983c>] sysfs_add_file+0xc/0x10
 [<ffffffff8117bf61>] sysfs_create_bin_file+0x21/0x30
 [<ffffffff81279c61>] _request_firmware+0x2f1/0x650
 [<ffffffff8127a04e>] request_firmware+0xe/0x10
 [<ffffffffa01ec19e>] bnx2_init_one+0x8f5/0x177e [bnx2]
 [<ffffffff81389eab>] ? _raw_spin_unlock_irq+0x2b/0x40
 [<ffffffff81040ed9>] ? finish_task_switch+0x69/0x100
 [<ffffffff81040e70>] ? finish_task_switch+0x0/0x100
 [<ffffffff81064b40>] ? do_work_for_cpu+0x0/0x30
 [<ffffffff811e6302>] local_pci_probe+0x12/0x20
 [<ffffffff81064b53>] do_work_for_cpu+0x13/0x30
 [<ffffffff81064b40>] ? do_work_for_cpu+0x0/0x30
 [<ffffffff81068c56>] kthread+0x96/0xa0
 [<ffffffff81003e64>] kernel_thread_helper+0x4/0x10
 [<ffffffff8138a350>] ? restore_args+0x0/0x30
 [<ffffffff81068bc0>] ? kthread+0x0/0xa0
 [<ffffffff81003e60>] ? kernel_thread_helper+0x0/0x10
---[ end trace a2ecee9c9602d195 ]---

Cc: Eric W. Biederman <ebiederm@...ssion.com>
Cc: Greg Kroah-Hartman <gregkh@...e.de>
Signed-off-by: Jiri Kosina <jkosina@...e.cz>

--- 
 drivers/base/firmware_class.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c
index d0dc26a..fc7565c 100644
--- a/drivers/base/firmware_class.c
+++ b/drivers/base/firmware_class.c
@@ -442,6 +442,7 @@ static int fw_setup_device(struct firmware *fw, struct device **dev_p,
 	fw_priv = dev_get_drvdata(f_dev);
 
 	fw_priv->fw = fw;
+	sysfs_bin_attr_init(&fw_priv->attr_data);
 	retval = sysfs_create_bin_file(&f_dev->kobj, &fw_priv->attr_data);
 	if (retval) {
 		dev_err(device, "%s: sysfs_create_bin_file failed\n", __func__);
--
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