On 02/29/2016 06:28 AM, Jes Sorensen wrote:
That one I have never seen before - could you try and insert some debug
prints to see where the RF initialization fails?
The call to usb_control_msg() is returning -EPROTO (-71), but sometimes the
system works. I added the following patch:
diff --git a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.c
b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.c
index 38aa3c2..8ab77a0 100644
--- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.c
+++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.c
@@ -1979,9 +1979,12 @@ static int rtl8xxxu_write_rfreg(struct rtl8xxxu_priv *priv,
/* Use XB for path B */
ret = rtl8xxxu_write32(priv, rtl8xxxu_rfregs[path].lssiparm, dataaddr);
- if (ret != sizeof(dataaddr))
+ if (ret != sizeof(dataaddr)) {
+ pr_info("**** rtl8xxxu_write32() error %d: path %d, reg: 0x%x,
data 0x%x, dataaddr 0x%x, lssiparm 0x%x\n",
+ ret, path, reg, data, dataaddr,
rtl8xxxu_rfregs[path].lssiparm);
+ dump_stack();
retval = -EIO;
- else
+ } else
retval = 0;
udelay(1);
When the error happens, my log contains
[52347.751420] **** rtl8xxxu_write32() error -71: path 0, reg: 0x2a, data 0x5,
dataaddr 0x2a00005, lssiparm 0x840
[52347.751427] CPU: 0 PID: 5743 Comm: systemd-udevd Not tainted 4.5.0-rc2-jes+ #2
[52347.751429] Hardware name: TOSHIBA TECRA A50-A/TECRA A50-A, BIOS Version 4.20
04/17/2014
[52347.751430] 00000000fffffffb ffff880117e139b8 ffffffff813d7722 ffff880101fb2860
[52347.751433] ffff880117e13a00 ffffffffa066ed56 ffffffff00000840 0000000500000010
[52347.751435] ffffffffa06803c0 ffff880101fb2860 0000000000000000 0000000000000031
[52347.751437] Call Trace:
[52347.751442] [<ffffffff813d7722>] dump_stack+0x4b/0x79
[52347.751446] [<ffffffffa066ed56>] rtl8xxxu_write_rfreg+0x146/0x150 [rtl8xxxu]
[52347.751448] [<ffffffffa0672c32>] rtl8xxxu_init_phy_rf+0x152/0x240 [rtl8xxxu]
[52347.751451] [<ffffffffa0676c89>] rtl8192cu_init_phy_rf+0x69/0x70 [rtl8xxxu]
[52347.751453] [<ffffffffa06783ac>] rtl8xxxu_init_device.isra.36+0x57c/0x14d0
[rtl8xxxu]
[52347.751456] [<ffffffff815146a8>] ? release_firmware+0x58/0x70
[52347.751458] [<ffffffffa067a0d5>] rtl8xxxu_probe+0xdd5/0x1130 [rtl8xxxu]
[52347.751461] [<ffffffff815829a8>] usb_probe_interface+0x1c8/0x310
[52347.751463] [<ffffffff814ff507>] driver_probe_device+0x247/0x460
--snip--
[52347.751487] [<ffffffff811899ea>] do_init_module+0x60/0x1ee
[52347.751489] [<ffffffff81108e51>] load_module+0x1ee1/0x2830
[52347.751491] [<ffffffff81105230>] ? __symbol_put+0x50/0x50
[52347.751493] [<ffffffff811098d9>] SyS_init_module+0x139/0x180
[52347.751495] [<ffffffff81776c17>] entry_SYSCALL_64_fastpath+0x12/0x6f
[52347.751498] usb 3-6: Failed to initialize RF
Perhaps you can recognize what is wrong.
Larry
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