On 06/21/2012 10:51 AM, Richard Zhao wrote: > Sometimes, the driver bindings may know what phy they use. > For example, when using device tree, the usb controller may have a > phandler pointing to usb phy. Remove the module doesn't remove the platform device. A subsequent modprobe fails with: ------------[ cut here ]------------ WARNING: at fs/sysfs/dir.c:529 sysfs_add_one+0x8c/0xbc() sysfs: cannot create duplicate filename '/devices/80080000.ahb/80080000.usb/ci_hdrc.0' Modules linked in: ci13xxx_imx(+) ci_hdrc udc_core [last unloaded: ci13xxx_imx] [<c000e6c8>] (unwind_backtrace+0x0/0xf0) from [<c0015c70>] (warn_slowpath_common+0x4c/0x64) [<c0015c70>] (warn_slowpath_common+0x4c/0x64) from [<c0015d1c>] (warn_slowpath_fmt+0x30/0x40) [<c0015d1c>] (warn_slowpath_fmt+0x30/0x40) from [<c00dbbbc>] (sysfs_add_one+0x8c/0xbc) [<c00dbbbc>] (sysfs_add_one+0x8c/0xbc) from [<c00dbd2c>] (create_dir+0x60/0xc0) [<c00dbd2c>] (create_dir+0x60/0xc0) from [<c00dc08c>] (sysfs_create_dir+0x64/0xa8) [<c00dc08c>] (sysfs_create_dir+0x64/0xa8) from [<c0151f28>] (kobject_add_internal+0xa4/0x1e8) [<c0151f28>] (kobject_add_internal+0xa4/0x1e8) from [<c0152434>] (kobject_add+0x50/0x98) [<c0152434>] (kobject_add+0x50/0x98) from [<c0187fe4>] (device_add+0xb8/0x358) [<c0187fe4>] (device_add+0xb8/0x358) from [<c018b76c>] (platform_device_add+0xf8/0x1a0) [<c018b76c>] (platform_device_add+0xf8/0x1a0) from [<bf006250>] (ci13xxx_add_device+0xd4/0x114 [ci_hdrc]) [<bf006250>] (ci13xxx_add_device+0xd4/0x114 [ci_hdrc]) from [<bf022264>] (ci13xxx_imx_probe+0x1e0/0x288 [ci13xxx_imx]) [<bf022264>] (ci13xxx_imx_probe+0x1e0/0x288 [ci13xxx_imx]) from [<c018b378>] (platform_drv_probe+0x14/0x18) [<c018b378>] (platform_drv_probe+0x14/0x18) from [<c018a230>] (really_probe+0x68/0x1e0) [<c018a230>] (really_probe+0x68/0x1e0) from [<c018a530>] (__driver_attach+0x8c/0x90) [<c018a530>] (__driver_attach+0x8c/0x90) from [<c0188c0c>] (bus_for_each_dev+0x54/0x7c) [<c0188c0c>] (bus_for_each_dev+0x54/0x7c) from [<c0189b74>] (bus_add_driver+0x17c/0x248) [<c0189b74>] (bus_add_driver+0x17c/0x248) from [<c018a7e4>] (driver_register+0x78/0x12c) [<c018a7e4>] (driver_register+0x78/0x12c) from [<c00086c4>] (do_one_initcall+0x30/0x168) [<c00086c4>] (do_one_initcall+0x30/0x168) from [<c004c824>] (sys_init_module+0x74/0x198) [<c004c824>] (sys_init_module+0x74/0x198) from [<c0009260>] (ret_fast_syscall+0x0/0x2c) ---[ end trace e152599aa12f31d8 ]--- ------------[ cut here ]------------ WARNING: at lib/kobject.c:196 kobject_add_internal+0x1cc/0x1e8() kobject_add_internal failed for ci_hdrc.0 with -EEXIST, don't try to register things with the same name in the same directory. Modules linked in: ci13xxx_imx(+) ci_hdrc udc_core [last unloaded: ci13xxx_imx] [<c000e6c8>] (unwind_backtrace+0x0/0xf0) from [<c0015c70>] (warn_slowpath_common+0x4c/0x64) [<c0015c70>] (warn_slowpath_common+0x4c/0x64) from [<c0015d1c>] (warn_slowpath_fmt+0x30/0x40) [<c0015d1c>] (warn_slowpath_fmt+0x30/0x40) from [<c0152050>] (kobject_add_internal+0x1cc/0x1e8) [<c0152050>] (kobject_add_internal+0x1cc/0x1e8) from [<c0152434>] (kobject_add+0x50/0x98) [<c0152434>] (kobject_add+0x50/0x98) from [<c0187fe4>] (device_add+0xb8/0x358) [<c0187fe4>] (device_add+0xb8/0x358) from [<c018b76c>] (platform_device_add+0xf8/0x1a0) [<c018b76c>] (platform_device_add+0xf8/0x1a0) from [<bf006250>] (ci13xxx_add_device+0xd4/0x114 [ci_hdrc]) [<bf006250>] (ci13xxx_add_device+0xd4/0x114 [ci_hdrc]) from [<bf022264>] (ci13xxx_imx_probe+0x1e0/0x288 [ci13xxx_imx]) [<bf022264>] (ci13xxx_imx_probe+0x1e0/0x288 [ci13xxx_imx]) from [<c018b378>] (platform_drv_probe+0x14/0x18) [<c018b378>] (platform_drv_probe+0x14/0x18) from [<c018a230>] (really_probe+0x68/0x1e0) [<c018a230>] (really_probe+0x68/0x1e0) from [<c018a530>] (__driver_attach+0x8c/0x90) [<c018a530>] (__driver_attach+0x8c/0x90) from [<c0188c0c>] (bus_for_each_dev+0x54/0x7c) [<c0188c0c>] (bus_for_each_dev+0x54/0x7c) from [<c0189b74>] (bus_add_driver+0x17c/0x248) [<c0189b74>] (bus_add_driver+0x17c/0x248) from [<c018a7e4>] (driver_register+0x78/0x12c) [<c018a7e4>] (driver_register+0x78/0x12c) from [<c00086c4>] (do_one_initcall+0x30/0x168) [<c00086c4>] (do_one_initcall+0x30/0x168) from [<c004c824>] (sys_init_module+0x74/0x198) [<c004c824>] (sys_init_module+0x74/0x198) from [<c0009260>] (ret_fast_syscall+0x0/0x2c) ---[ end trace e152599aa12f31d9 ]--- imx_usb 80080000.usb: Can't register ci_hdrc platform device, err=-17 imx_usb: probe of 80080000.usb failed with error -17 Marc -- Pengutronix e.K. | Marc Kleine-Budde | Industrial Linux Solutions | Phone: +49-231-2826-924 | Vertretung West/Dortmund | Fax: +49-5121-206917-5555 | Amtsgericht Hildesheim, HRA 2686 | http://www.pengutronix.de |
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