On 10/05/2014 06:52 AM, [email protected] wrote: > Hi, > > while trying to get a mt7601sta (UWN200 WiFi dongle) driver running > and working I came accross this in the dmesg output: > > [ 9.931938] usb 2-1: device v148f p7601 is not supported
This looks to me like it's the real error, not the one below. > [ 9.931976] usb 2-1: New USB device found, idVendor=148f, idProduct=7601 > [ 9.931994] usb 2-1: New USB device strings: Mfr=1, Product=2, > SerialNumber=3 > [ 10.077532] rtusb init rt2870 ---> > [ 10.079338] > > === pAd = e0c58000, size = 860808 === > > [ 10.079939] ERROR: 256 KiB atomic DMA coherent pool is too small! > Please increase it with coherent_pool= kernel parameter! > [ 10.079968] <-- ERROR in Alloc Bulk buffer for HTTxContext! > [ 10.079983] ---> RTMPFreeTxRxRingMemory > [ 10.080026] <--- RTMPFreeTxRxRingMemory > [ 10.080040] ERROR!!! Failed to allocate memory - TxRxRing > > > But > > cat /proc/cmdline > > shows: > > console=tty1 root=/dev/mmcblk0p2 ro rootfstype=ext4 rootwait fixrtc > capemgr.disable_partno=BB-BONELT-HDMI,BB-BONELT-HDMIN,BB-BONE-EMMC-2G,coherent_pool=2M > > (this is an embedded device, thats why there are the other parameters > around...) > > I do not find any way to set this parameter while compiling the > kernel. And setting the kernel parameter seems not to work either... > > Lost? > > ...or am I only blind... ? ;) > > How can I increase the cohorent pool size successfully? > > Best regards, > mcc > > PS: The driver sources are not included in the kernel and have to be > compiled externally/extra... > > >
