From mboxrd@z Thu Jan 1 00:00:00 1970 From: Greg KH Subject: Re: alloc_tty_driver fails with ENOMEM Date: Tue, 6 Oct 2015 09:19:03 +0100 Message-ID: <20151006081903.GA19357@kroah.com> References: <20151006064424.GD2472@tarshish> <20151006075307.GA18449@kroah.com> <20151006080345.GE2472@tarshish> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <20151006080345.GE2472@tarshish> Sender: linux-kernel-owner@vger.kernel.org To: Baruch Siach Cc: linux-usb@vger.kernel.org, linux-serial@vger.kernel.org, debian-kernel@lists.debian.org, linux-kernel@vger.kernel.org List-Id: linux-serial@vger.kernel.org On Tue, Oct 06, 2015 at 11:03:46AM +0300, Baruch Siach wrote: > Hi Greg, > > On Tue, Oct 06, 2015 at 08:53:07AM +0100, Greg KH wrote: > > On Tue, Oct 06, 2015 at 09:44:24AM +0300, Baruch Siach wrote: > > > Since upgrading to kernel version from 4.1.x to 4.2.1 on Debian testing I > > > am getting on my PC the following usbserial module init failure when > > > connecting my PC to the i.MX6 SabreSD FTDI USB/serial connector: > > > > > > [39987.092021] usb 1-5.1: new full-speed USB device number 4 using ehci-pci > > > [39987.190805] usb 1-5.1: New USB device found, idVendor=0403, idProduct=6001 > > > [39987.190810] usb 1-5.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 > > > [39987.190813] usb 1-5.1: Product: FT232R USB UART > > > [39987.190817] usb 1-5.1: Manufacturer: FTDI > > > [39987.190820] usb 1-5.1: SerialNumber: A903PDKT > > > [39989.127918] systemd-udevd: page allocation failure: order:4, mode:0x2040d0 > > > > This shows that you have some serious memory issues happening here :( > > Which part is showing this? Is the order too high? Unusual mode? The page allocation failure of a "normal" allocation means that something is going wrong outside of the USB subsystem. thanks, greg k-h