Hi Jon, It seems the AX88772x dongle had been unexpectedly removed while running the ax88772_suspend() routine. If yes, you might see these error messages because the hardware had been absent. --- Best regards, Allan Chou -----Original Message----- From: Jon Hunter [mailto:jonathanh@xxxxxxxxxx] Sent: Thursday, November 10, 2016 8:01 PM To: robert.foss@xxxxxxxxxxxxx; freddy@xxxxxxxxxxx; Dean_Jenkins@xxxxxxxxxx; Mark_Craske@xxxxxxxxxx; davem@xxxxxxxxxxxxx; ivecera@xxxxxxxxxx; john.stultz@xxxxxxxxxx; vpalatin@xxxxxxxxxxxx; stephen@xxxxxxxxxxxxxxxxxx; grundler@xxxxxxxxxxxx; changchias@xxxxxxxxx; allan@xxxxxxxxxxx; andrew@xxxxxxx; tremyfr@xxxxxxxxx; colin.king@xxxxxxxxxxxxx; linux-usb@xxxxxxxxxxxxxxx; netdev@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; vpalatin@xxxxxxxxxx Subject: Re: [PATCH v3 3/5] net: asix: Fix AX88772x resume failures Hi Robert, On 29/08/16 14:32, robert.foss@xxxxxxxxxxxxx wrote: > From: Robert Foss <robert.foss@xxxxxxxxxxxxx> > > From: Allan Chou <allan@xxxxxxxxxxx> > > The change fixes AX88772x resume failure by > - Restore incorrect AX88772A PHY registers when resetting > - Need to stop MAC operation when suspending > - Need to restart MII when restoring PHY > > Signed-off-by: Allan Chou <allan@xxxxxxxxxxx> > Signed-off-by: Robert Foss <robert.foss@xxxxxxxxxxxxx> > Tested-by: Robert Foss <robert.foss@xxxxxxxxxxxxx> After this commit, I have started seeing the following messages during system suspend on various tegra boards using asix ethernet dongles ... [ 288.667010] PM: Syncing filesystems ... done. [ 288.672223] Freezing user space processes ... (elapsed 0.001 seconds) done. [ 288.680505] Double checking all user space processes after OOM killer disable... (elapsed 0.000 seconds) [ 288.690193] Freezing remaining freezable tasks ... (elapsed 0.001 seconds) done. [ 288.698987] Suspending console(s) (use no_console_suspend to debug) [ 288.706605] asix 1-1:1.0 eth0: Failed to read reg index 0x0000: -19 [ 288.706613] asix 1-1:1.0 eth0: Error reading Medium Status register: ffffffed [ 288.706621] asix 1-1:1.0 eth0: Failed to write reg index 0x0000: -19 [ 288.706629] asix 1-1:1.0 eth0: Failed to write Medium Mode mode to 0xfeed: ffffffed [ 288.759167] PM: suspend of devices complete after 52.772 msecs Interestingly, it only seems to happen if the ethernet is in a disconnected state when entering suspend. I have not had chance to look at this any further, but wanted to see if you had any thoughts. Cheers Jon -- nvpublic -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
