Hi,
When the XO-4 with 8787 wireless is woken up due to wake-on-WLAN,
mwifiex is often unhappy and reports this:
mwifiex_sdio mmc0:0001:1: mwifiex_write_data_sync: not allowed while suspended
mwifiex_sdio mmc0:0001:1: host_to_card, write iomem (1) failed: -1
mwifiex_sdio mmc0:0001:1: mwifiex_write_data_sync: not allowed while suspended
mwifiex_sdio mmc0:0001:1: host_to_card, write iomem (2) failed: -1
mwifiex_sdio mmc0:0001:1: mwifiex_write_data_sync: not allowed while suspended
mwifiex_sdio mmc0:0001:1: host_to_card, write iomem (3) failed: -1
mwifiex_sdio mmc0:0001:1: mwifiex_write_data_async failed: 0xFFFFFFFF
mwifiex_sdio mmc0:0001:1: mwifiex_sdio_host_to_card: no wr_port available
mwifiex_sdio mmc0:0001:1: mwifiex_sdio_host_to_card: no wr_port available
mwifiex_sdio mmc0:0001:1: mwifiex_sdio_host_to_card: no wr_port available
mwifiex_sdio mmc0:0001:1: mwifiex_sdio_host_to_card: no wr_port available
mwifiex_sdio mmc0:0001:1: mwifiex_sdio_host_to_card: no wr_port available
mwifiex_sdio mmc0:0001:1: mwifiex_sdio_host_to_card: no wr_port available
mwifiex_sdio mmc0:0001:1: mwifiex_sdio_host_to_card: no wr_port available
[...]
After this flood of messages, the interface is unusable.
This can be readily reproduced when putting the XO-4 in a loop where
it goes to sleep due to inactivity, but then wakes up due to an
incoming ping. The error is hit within an hour or two.
I think it shows a race where the upper mwifiex layers try to do card
communication before mwifiex_sdio_resume() has done its work - there
is some serialization missing.
This can be reproduced on every single ping-invoked wakeup if you
insert a msleep(1000) inside mwifiex_sdio_resume() e.g. here:
if (!adapter->is_suspended) {
dev_warn(adapter->dev, "device already resumed\n");
return 0;
}
msleep(1000);
adapter->is_suspended = false;
Thanks for any help you can offer.
Daniel
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