On 9/5/20 12:28 AM, Baptiste Jonglez wrote: > On 03-09-20, Nick Lowe wrote: >> It seems there is an important ath10k patch included in the 4.4.235, >> 4.9.235, 4.14.196 and 4.19.143, 5.4.62 LTS kernels that is applicable >> for OpenWRT users who are not using an up to date CT driver with Wave >> 2 QCA 802.11ac generation hardware, it is already merged for CT. > > Do you mean that it affects both ath10k and ath10k-ct in the 19.07 branch? > >> It resolves a PCIe hang seen due to the DMA burst size value meaning >> different things between Wave 1 and Wave 2 hardware. >> >> The issue resolved is that a value of 0 for the DMA burst size has a >> different meaning and instruction depending on the generation. > > Do you have more details, references? A commit?
He is probably talking about this commit: https://git.kernel.org/linus/a1769bb68a850508a492e3674ab1e5e479b11254 from kernel 5.6. This was backported to version v4.19.143 and v4.14.196 some days ago. The problem affects ath10k-ct in all versions (18.06, 19.07 and master) and ath10k in 19.07 and 18.06. Hauke
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