0) In the logs of a laptop I use I've found error pairs like this error
pair:
<3>[13053.997856] ath5k phy0: failed to warm reset the MAC Chip
<3>[13053.997871] ath5k phy0: can't reset hardware (-5)
The logs show it for a v3.3 based kernel and for the v3.4-rc2 kernel. I
can't say whether or not preceding kernels also triggered it.
1) I only noticed these errors because I tend to check these logs for
errors: I cannot link these errors to drops in (the quality of) wireless
connectivity.
2) The call chain involved should be:
drivers/net/wireless/ath/ath5k/base.c:
2737 ath5k_reset(...)
{
2765 ret = ath5k_hw_reset(...);
2766 if (ret) {
2767 ATH5K_ERR(ah, "can't reset hardware (%d)\n", ret);
2768 goto err;
2769 }
}
drivers/net/wireless/ath/ath5k/base.c:
1144 ath5k_hw_reset(...)
{
1296 ret = ath5k_hw_nic_wakeup(...);
1297 if (ret)
1298 return ret;
}
667 ath5k_hw_nic_wakeup(...)
{
728 ret = ath5k_hw_nic_reset(...);
729
730 if (ret) {
731 ATH5K_ERR(ah, "failed to warm reset the MAC Chip\n");
732 return -EIO;
733 }
}
395 ath5k_hw_nic_reset(...)
{
421 ret = ath5k_hw_register_timeout(...);
}
65 ath5k_hw_register_timeout(...)
{
80 return (i <= 0) ? -EAGAIN : 0;
}
Note that the -EAGAIN returned by ath5k_hw_register_timeout() and
ath5k_hw_nic_reset() is transformed to -EIO by ath5k_hw_nic_wakeup().
3) Do these message really indicate errors? Or can they perhaps be
downgraded to (say) KERN_INFO level (ie, <6> prefix)?
Paul Bolle
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