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 [ 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...
