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e06513d78d
The smsc911x driver will crash if it is rmmod'ed while the netdev is up like: Call trace: phy_detach+0x94/0x150 phy_disconnect+0x40/0x50 smsc911x_stop+0x104/0x128 [smsc911x] __dev_close_many+0xb4/0x138 dev_close_many+0xbc/0x190 rollback_registered_many+0x140/0x460 rollback_registered+0x68/0xb0 unregister_netdevice_queue+0x100/0x118 unregister_netdev+0x28/0x38 smsc911x_drv_remove+0x58/0x130 [smsc911x] platform_drv_remove+0x30/0x50 device_release_driver_internal+0x15c/0x1f8 driver_detach+0x54/0x98 bus_remove_driver+0x64/0xe8 driver_unregister+0x34/0x60 platform_driver_unregister+0x20/0x30 smsc911x_cleanup_module+0x14/0xbca8 [smsc911x] SyS_delete_module+0x1e8/0x238 __sys_trace_return+0x0/0x4 This is caused by the mdiobus being unregistered/free'd and the code in phy_detach() attempting to manipulate mdio related structures from unregister_netdev() calling close() To fix this, we delay the mdiobus teardown until after the netdev is deregistered. Reported-by: Matt Sealey <matt.sealey@arm.com> Signed-off-by: Jeremy Linton <jeremy.linton@arm.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net> |
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Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.