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Message-ID: <4E53C322.90500@faberman.de>
Date: Tue, 23 Aug 2011 17:11:30 +0200
From: Florian Faber <faber@...erman.de>
To: linux-kernel@...r.kernel.org
Subject: [PATCH] w1_int.c: multiple masters used same init_name
When using multiple masters, w1_int.c would use the .init_name from w1.c
for all entities, which will fail when creating a corresponding sysfs
entry. This patch uses the unique name previously generated.
Signed-off-by: Florian Faber <faber@...erman.de>
-----------------------patch-----------------------
+++ /drivers/w1/w1_int.c 2011-08-23 16:51:22.267148469 +0200
@@ -78,6 +78,7 @@
memcpy(&dev->dev, device, sizeof(struct device));
dev_set_name(&dev->dev, "w1_bus_master%u", dev->id);
snprintf(dev->name, sizeof(dev->name), "w1_bus_master%u", dev->id);
+ dev->dev.init_name = dev->name;
dev->driver = driver;
-----------------------patch-----------------------
Also, the maintainer's email address listed in MAINTAINERS, Evgeniy
Polyakov <johnpol@....mipt.ru>, doesn't seem to exist anymore.
------------------------------snip---------------------
[ 0.716000] WARNING: at fs/sysfs/dir.c:451 sysfs_add_one+0x48/0x64()
[ 0.716000] sysfs: cannot create duplicate filename '/devices/w1 bus
master'
[ 0.716000] Modules linked in:
[ 0.716000] Call trace:
[ 0.716000] [<9001a604>] warn_slowpath_common+0x34/0x44
[ 0.716000] [<9001a64c>] warn_slowpath_fmt+0x14/0x18
[ 0.720000] [<90078020>] sysfs_add_one+0x48/0x64
[ 0.720000] [<900784ec>] create_dir+0x40/0x68
[ 0.720000] [<9007857a>] sysfs_create_dir+0x66/0x78
[ 0.720000] [<900c1a8a>] kobject_add_internal+0x6e/0x104
[ 0.720000] [<900c1bc0>] kobject_add_varg+0x20/0x2c
[ 0.720000] [<900c1c1c>] kobject_add+0x30/0x3c
[ 0.720000] [<900dbd66>] device_add+0x6a/0x378
[ 0.720000] [<900dbb4a>] device_initialize+0x12/0x48
[ 0.720000] [<900dc080>] device_register+0xc/0x10
[ 0.720000] [<900f99be>] w1_add_master_device+0x162/0x274
[ 0.720000] [<90008e7a>] w1_gpio_probe+0x66/0xb4
[ 0.720000] [<9000030c>] kernel_init+0x0/0xe8
[ 0.720000] [<900dde54>] platform_drv_probe+0xc/0xe
[ 0.720000] [<9000030c>] kernel_init+0x0/0xe8
[ 0.720000] [<900dd4f8>] driver_probe_device+0x6c/0xdc
[ 0.720000] [<900dd5fc>] __driver_attach+0x34/0x48
[ 0.720000] [<900dcce8>] bus_for_each_dev+0x2c/0x48
[ 0.720000] [<900dd5c8>] __driver_attach+0x0/0x48
[ 0.720000] [<900dd38c>] driver_attach+0x10/0x14
[ 0.720000] [<900dd16a>] bus_add_driver+0x6a/0x18c
[ 0.720000] [<900dd768>] driver_register+0x60/0xb8
[ 0.720000] [<90011594>] __initcall_w1_therm_init6+0x0/0x4
[ 0.720000] [<90008e00>] w1_gpio_init+0x0/0x14
[ 0.720000] [<9000030c>] kernel_init+0x0/0xe8
[ 0.720000] [<900ddf48>] platform_driver_register+0x30/0x38
[ 0.720000] [<90011594>] __initcall_w1_therm_init6+0x0/0x4
[ 0.720000] [<90008e00>] w1_gpio_init+0x0/0x14
[ 0.720000] [<9000030c>] kernel_init+0x0/0xe8
[ 0.720000] [<900ddf5e>] platform_driver_probe+0xe/0x3c
[ 0.720000] [<90008e0c>] w1_gpio_init+0xc/0x14
[ 0.720000] [<90011594>] __initcall_w1_therm_init6+0x0/0x4
[ 0.720000] [<90008e00>] w1_gpio_init+0x0/0x14
[ 0.720000] [<900126d4>] do_one_initcall+0x34/0x130
[ 0.720000] [<90000372>] kernel_init+0x66/0xe8
[ 0.720000] [<90011594>] __initcall_w1_therm_init6+0x0/0x4
[ 0.720000] [<9001ca3e>] do_exit+0x0/0x3a6
[ 0.720000] [<9000030c>] kernel_init+0x0/0xe8
[ 0.720000] [<9001ca3e>] do_exit+0x0/0x3a6
[ 0.720000]
[ 0.720000] ---[ end trace 5a9233884fead918 ]---
[ 0.720000] kobject_add_internal failed for w1 bus master with
-EEXIST, don't try to register things with the same name in the same
directory.
-------------------------------snip-----------------
Flo
--
Machines can do the work, so people have time to think.
public key B3B9226C x-hkp://wwwkeys.eu.pgp.net
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