Searched hist:"915 a081ff307d61d6551d6c16b542e03775353c4" (Results 1 – 1 of 1) sorted by relevance
| /openbmc/linux/drivers/net/wireless/ath/ath11k/ |
| H A D | pci.c | diff 915a081ff307d61d6551d6c16b542e03775353c4 Fri Nov 19 07:36:26 CST 2021 Carl Huang <cjhuang@codeaurora.org> ath11k: do not restore ASPM in case of single MSI vector
Current code enables ASPM by default, it allows MHI to enter M2 state.
In case of one MSI vector, system hang is observed if ath11k does MHI
register reading in this state. The issue was reported on Dell XPS 13
9310 but is seen also on XPS 15 and XPS 17 laptops.
The workaround here is to prevent MHI from entering M2 state, this can
be done by disabling ASPM if only one MSI vector is used. When using 32
vectors ASPM is enabled as before.
Tested-on: QCA6390 hw2.0 PCI WLAN.HST.1.0.1-01740-QCAHSTSWPLZ_V2_TO_X86-1
Signed-off-by: Carl Huang <cjhuang@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Baochen Qiang <bqiang@codeaurora.org>
Link: https://lore.kernel.org/r/20211026041722.5271-1-bqiang@codeaurora.org
|