From b48f5457b4e9d64d9c1117a4ece247d98b4db49f Mon Sep 17 00:00:00 2001 From: "Zhang, Yanmin" Date: Thu, 16 Nov 2006 01:19:08 -0800 Subject: [PATCH] [PATCH] ipmi: use platform_device_add() instead of platform_device_register() to register device allocated dynamically I got below warning when running 2.6.19-rc5-mm1 on my ia64 machine. WARNING at lib/kobject.c:172 kobject_init() Call Trace: [] show_stack+0x40/0xa0 sp=e0000002ff9f7bc0 bsp=e0000002ff9f0d10 [] dump_stack+0x30/0x60 sp=e0000002ff9f7d90 bsp=e0000002ff9f0cf8 [] kobject_init+0x90/0x160 sp=e0000002ff9f7d90 bsp=e0000002ff9f0cd0 [] device_initialize+0x40/0x1c0 sp=e0000002ff9f7da0 bsp=e0000002ff9f0cb0 [] platform_device_register+0x20/0x60 sp=e0000002ff9f7dd0 bsp=e0000002ff9f0c90 [] try_smi_init+0xbc0/0x11e0 sp=e0000002ff9f7dd0 bsp=e0000002ff9f0c50 [] init_ipmi_si+0xaa0/0x12e0 sp=e0000002ff9f7de0 bsp=e0000002ff9f0bd8 [] init+0x350/0x780 sp=e0000002ff9f7e00 bsp=e0000002ff9f0ba8 [] kernel_thread_helper+0x30/0x60 sp=e0000002ff9f7e30 bsp=e0000002ff9f0b80 [] start_kernel_thread+0x20/0x40 sp=e0000002ff9f7e30 bsp=e0000002ff9f0b80 WARNING at lib/kobject.c:172 kobject_init() Call Trace: [] show_stack+0x40/0xa0 sp=e0000002ff9f7b40 bsp=e0000002ff9f0db0 [] dump_stack+0x30/0x60 sp=e0000002ff9f7d10 bsp=e0000002ff9f0d98 [] kobject_init+0x90/0x160 sp=e0000002ff9f7d10 bsp=e0000002ff9f0d70 [] device_initialize+0x40/0x1c0 sp=e0000002ff9f7d20 bsp=e0000002ff9f0d50 [] platform_device_register+0x20/0x60 sp=e0000002ff9f7d50 bsp=e0000002ff9f0d30 [] ipmi_register_smi+0xcc0/0x18e0 sp=e0000002ff9f7d50 bsp=e0000002ff9f0c90 [] try_smi_init+0xc60/0x11e0 sp=e0000002ff9f7dd0 bsp=e0000002ff9f0c50 [] init_ipmi_si+0xaa0/0x12e0 sp=e0000002ff9f7de0 bsp=e0000002ff9f0bd8 [] init+0x350/0x780 sp=e0000002ff9f7e00 bsp=e0000002ff9f0ba8 [] kernel_thread_helper+0x30/0x60 sp=e0000002ff9f7e30 bsp=e0000002ff9f0b80 [] start_kernel_thread+0x20/0x40 sp=e0000002ff9f7e30 bsp=e0000002ff9f0b80 The root cause is the device struct is initialized twice. If the device is allocated dynamically by platform_device_alloc, platform_device_alloc will initialize struct device, then, platform_device_add should be used to register the device. The difference between platform_device_register and platform_device_add is platform_device_register will initiate the device while platform_device_add won't. Signed-off-by: Zhang Yanmin Cc: Corey Minyard Cc: Greg KH Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/char/ipmi/ipmi_msghandler.c | 2 +- drivers/char/ipmi/ipmi_si_intf.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/char/ipmi/ipmi_msghandler.c b/drivers/char/ipmi/ipmi_msghandler.c index a41b8df240..c47add8e47 100644 --- a/drivers/char/ipmi/ipmi_msghandler.c +++ b/drivers/char/ipmi/ipmi_msghandler.c @@ -2118,7 +2118,7 @@ static int ipmi_bmc_register(ipmi_smi_t intf) dev_set_drvdata(&bmc->dev->dev, bmc); kref_init(&bmc->refcount); - rv = platform_device_register(bmc->dev); + rv = platform_device_add(bmc->dev); mutex_unlock(&ipmidriver_mutex); if (rv) { printk(KERN_ERR diff --git a/drivers/char/ipmi/ipmi_si_intf.c b/drivers/char/ipmi/ipmi_si_intf.c index abc5149e30..bb1fac104f 100644 --- a/drivers/char/ipmi/ipmi_si_intf.c +++ b/drivers/char/ipmi/ipmi_si_intf.c @@ -2346,7 +2346,7 @@ static int try_smi_init(struct smi_info *new_smi) new_smi->dev = &new_smi->pdev->dev; new_smi->dev->driver = &ipmi_driver; - rv = platform_device_register(new_smi->pdev); + rv = platform_device_add(new_smi->pdev); if (rv) { printk(KERN_ERR "ipmi_si_intf:" -- 2.39.5