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| author | Zhi Chen <zhichen@codeaurora.org> | 2020-01-14 12:35:21 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-09-03 11:21:19 +0200 |
| commit | 01bb0556be4a69066ca9d40f61569f361857c2e5 (patch) | |
| tree | 3d41900fbffd6be5714e6bd0b8b2c610482aca69 /fs/jbd2 | |
| parent | 68604a87fbeb910d777309a4450e124c9a12f00e (diff) | |
Revert "ath10k: fix DMA related firmware crashes on multiple devices"
[ Upstream commit a1769bb68a850508a492e3674ab1e5e479b11254 ]
This reverts commit 76d164f582150fd0259ec0fcbc485470bcd8033e.
PCIe hung issue was observed on multiple platforms. The issue was reproduced
when DUT was configured as AP and associated with 50+ STAs.
For QCA9984/QCA9888, the DMA_BURST_SIZE register controls the AXI burst size
of the RD/WR access to the HOST MEM.
0 - No split , RAW read/write transfer size from MAC is put out on bus
as burst length
1 - Split at 256 byte boundary
2,3 - Reserved
With PCIe protocol analyzer, we can see DMA Read crossing 4KB boundary when
issue happened. It broke PCIe spec and caused PCIe stuck. So revert
the default value from 0 to 1.
Tested: IPQ8064 + QCA9984 with firmware 10.4-3.10-00047
QCS404 + QCA9984 with firmware 10.4-3.9.0.2--00044
Synaptics AS370 + QCA9888 with firmware 10.4-3.9.0.2--00040
Signed-off-by: Zhi Chen <zhichen@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'fs/jbd2')
0 files changed, 0 insertions, 0 deletions