Integrate linux-seco-imx/smsc95xx-fix-device-unplugged
smsc95xx: Ignore -ENODEV errors when device is unplugged
commit c70c453abcbf3ecbaadd4c3236a5119b8da365cf upstream.
According to Documentation/driver-api/usb/URB.rst when a device is unplugged usb_submit_urb() returns -ENODEV.
This error code propagates all the way up to usbnet_read_cmd() and usbnet_write_cmd() calls inside the smsc95xx.c driver during Ethernet cable unplug, unbind or reboot.
This causes the following errors to be shown on reboot, for example:
ci_hdrc ci_hdrc.1: remove, state 1 usb usb2: USB disconnect, device number 1 usb 2-1: USB disconnect, device number 2 usb 2-1.1: USB disconnect, device number 3 smsc95xx 2-1.1:1.0 eth1: unregister 'smsc95xx' usb-ci_hdrc.1-1.1, smsc95xx USB 2.0 Ethernet smsc95xx 2-1.1:1.0 eth1: Failed to read reg index 0x00000114: -19 smsc95xx 2-1.1:1.0 eth1: Error reading MII_ACCESS smsc95xx 2-1.1:1.0 eth1: __smsc95xx_mdio_read: MII is busy smsc95xx 2-1.1:1.0 eth1: Failed to read reg index 0x00000114: -19 smsc95xx 2-1.1:1.0 eth1: Error reading MII_ACCESS smsc95xx 2-1.1:1.0 eth1: __smsc95xx_mdio_read: MII is busy smsc95xx 2-1.1:1.0 eth1: hardware isn't capable of remote wakeup usb 2-1.4: USB disconnect, device number 4 ci_hdrc ci_hdrc.1: USB bus 2 deregistered ci_hdrc ci_hdrc.0: remove, state 4 usb usb1: USB disconnect, device number 1 ci_hdrc ci_hdrc.0: USB bus 1 deregistered imx2-wdt 30280000.watchdog: Device shutdown: Expect reboot! reboot: Restarting system
Ignore the -ENODEV errors inside __smsc95xx_mdio_read() and __smsc95xx_phy_wait_not_busy() and do not print error messages when -ENODEV is returned.
Fixes: a049a30fc27c ("net: usb: Correct PHY handling of smsc95xx") Signed-off-by: Fabio Estevam festevam@denx.de Signed-off-by: David S. Miller davem@davemloft.net Cc: Fabio Estevam festevam@gmail.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org