Mine

-->hang on rmmod:

root@OpenWrt:/lib/modules/2.6.19.2# rmmod acx
00102625 ==> acxpci_e_cleanup_module
00102625   ==> acxpci_e_remove
00102626     ==> acxpci_s_issue_cmd_timeo_debug
issue_cmd(cmd:ACX1xx_CMD_DISABLE_TX,buflen:0,timeout:50ms,type:0xFFFFFFFF)
input buffer (len=0):

cmd_type:0000 cmd_status:0000 [Idle]
00102627       ==> acx_s_msleep
00102630       <== acx_s_msleep
cmd_type:0006 cmd_status:0001 [Success]
issue_cmd(ACX1xx_CMD_DISABLE_TX): took 4 jiffies to complete
00102631     <== acxpci_s_issue_cmd_timeo_debug: 00000000
00102631     ==> acxpci_s_issue_cmd_timeo_debug
issue_cmd(cmd:ACX1xx_CMD_DISABLE_RX,buflen:0,timeout:50ms,type:0xFFFFFFFF)
input buffer (len=0):

cmd_type:0000 cmd_status:0000 [Idle]
00102633       ==> acx_s_msleep
00102635       <== acx_s_msleep
cmd_type:0005 cmd_status:0001 [Success]
issue_cmd(ACX1xx_CMD_DISABLE_RX): took 4 jiffies to complete
00102636     <== acxpci_s_issue_cmd_timeo_debug: 00000000
switching off power LED to save power
Please report in case toggling the power LED doesn't work for your card!
00102636     ==> acxpci_l_reset_mac
acxpci_l_reset_mac: enable soft reset...



hence it the issue here?

        /* halt eCPU */
        temp = read_reg16(adev, IO_ACX_ECPU_CTRL) | 0x1;
        write_reg16(adev, IO_ACX_ECPU_CTRL, temp);