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From: Kalle Valo <kvalo@codeaurora.org>
To: Zhi Chen <zhichen@codeaurora.org>
Cc: linux-wireless@vger.kernel.org, ath10k@lists.infradead.org
Subject: Re: [PATCH, v3] Revert "ath10k: fix DMA related firmware crashes on multiple devices"
Date: Thu, 19 Dec 2019 13:02:15 +0000 (UTC)	[thread overview]
Message-ID: <20191219130215.A627AC433CB@smtp.codeaurora.org> (raw)
In-Reply-To: <0101016ef916f2e7-28683312-1d0b-4c2e-b967-c13c3e45ce31-000000@us-west-2.amazonses.com>

Zhi Chen <zhichen@codeaurora.org> wrote:

> 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>

Fails to apply:

error: patch failed: drivers/net/wireless/ath/ath10k/hw.h:813
error: drivers/net/wireless/ath/ath10k/hw.h: patch does not apply
stg import: Diff does not apply cleanly

Patch set to Changes Requested.

-- 
https://patchwork.kernel.org/patch/11287143/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches

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  reply	other threads:[~2019-12-19 13:02 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-12  7:51 [PATCH,v3] Revert "ath10k: fix DMA related firmware crashes on multiple devices" Zhi Chen
2019-12-19 13:02 ` Kalle Valo [this message]
2019-12-19 13:02 ` [PATCH, v3] " Kalle Valo
  -- strict thread matches above, loose matches on Subject: below --
2019-12-12  7:50 [PATCH,v3] " Zhi Chen

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