On Wed, Nov 20, 2019 at 09:28:14PM +1100, JH wrote: > Hi, > > I am running 4G LTE (USB protocol) and WiFi on IMX6 board, the kernel > is 4.19.75 LTE. It is not clear where the kernel alignment trap came > from, the only thing I could see is the alignment trap message > generated immediate after USB GSM communication or mwifiex_sdio. Where > that the alignment trap came from? Which parts of the program could > contribute the kernel alignment trap, kernel iteself, or USB GSM or > mwifiex_sdio? Appreciate clues how to fix it. > > Nov 20 05:08:09 solar kernel: usb 1-1: GSM modem (1-port) converter > now attached to ttyUSB0 > Nov 20 05:08:09 solar kernel: option 1-1:1.2: GSM modem (1-port) > converter detected > Nov 20 05:08:09 solar kernel: usb 1-1: GSM modem (1-port) converter > now attached to ttyUSB1 > Nov 20 05:08:10 solar kernel: mwifiex_sdio mmc0:0001:1: info: trying > to associate to 'Solar Analytics Wifi' bssid 78:8a:20:49:4b:c5 > Nov 20 05:08:10 solar kernel: mwifiex_sdio mmc0:0001:1: info: > associated to bssid 78:8a:20:49:4b:c5 successfully > Nov 20 05:08:10 solar kernel: IPv6: ADDRCONF(NETDEV_CHANGE): mlan0: > link becomes ready > Nov 20 05:23:13 solar kernel: mwifiex_sdio mmc0:0001:1: info: > successfully disconnected from 78:8a:20:49:4b:c5: reason code 3 > Nov 20 05:23:13 solar kernel: IPv6: ADDRCONF(NETDEV_UP): mlan0: link > is not ready > Nov 20 05:23:18 solar kernel: Alignment trap: not handling instruction > e8532f00 at [<b6c802b6>] > Nov 20 05:23:18 solar kernel: Unhandled fault: alignment exception > (0x001) at 0x38626667 > Nov 20 05:23:18 solar kernel: pgd = 34bdb7e7 > Nov 20 05:23:18 solar kernel: [38626667] *pgd=00000000 You should have a much longer tracedump after this, right? Can you provide that please? And why do you think this was a USB issue? thanks, greg k-h
