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From: Luca Coelho <luca@coelho.fi>
To: Luca Coelho <luca@coelho.fi>
Cc: kvalo@codeaurora.org, johannes@sipsolutions.net,
	linux-wireless@vger.kernel.org
Subject: Re: [PATCH v2 11/12] iwlwifi: pcie: remove TR/CR tail allocations
Date: Tue, 22 Jun 2021 15:20:54 +0300	[thread overview]
Message-ID: <E1lvfOf-001awB-EH@farmhouse.coelho.fi> (raw)
In-Reply-To: <iwlwifi.20210617110647.5f5764e04c46.I4d5de1929be048085767f1234a1e07b517ab6a2d@changeid>

Luca Coelho <luca@coelho.fi> wrote:

> From: Johannes Berg <johannes.berg@intel.com>
> 
> The TR/CR tail data are meant to be per-queue-arrays, however,
> we allocate them completely wrong (we have a separate allocation
> per queue).
> 
> Looking at this more closely, it turns out that the hardware
> never uses these - we have a separate free list per RX queue
> and maintain a write pointer for that in a register, and the
> RX itself is indicated in the RB status (rb_stts) DMA region.
> 
> Despite nothing using the tail pointers, the hardware will
> unconditionally access them to write updates, even when we aren't
> using CRs/TRs.
> 
> Give it dummy values that we never use/update so it can do that
> without causing trouble.
> 
> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
> Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

Patch applied to iwlwifi-next.git, thanks.

a5575a54df00 iwlwifi: pcie: remove TR/CR tail allocations


  reply	other threads:[~2021-06-22 12:21 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-17  7:08 [PATCH 00/12] iwlwifi: updates intended for v5.14 2021-06-17 Luca Coelho
2021-06-17  7:08 ` [PATCH 01/12] iwlwifi: pcie: identify the RF module Luca Coelho
2021-06-17  7:08 ` [PATCH 02/12] iwlwifi: mvm: don't request SMPS in AP mode Luca Coelho
2021-06-17  7:08 ` [PATCH 03/12] iwlwifi: mvm: apply RX diversity per PHY context Luca Coelho
2021-06-17  7:08 ` [PATCH 04/12] iwlwifi: mvm: honour firmware SMPS requests Luca Coelho
2021-06-17  7:08 ` [PATCH 05/12] iwlwifi: mvm: fix error print when session protection ends Luca Coelho
2021-06-17  7:08 ` [PATCH 06/12] iwlwifi: mvm: Call NMI instead of REPLY_ERROR Luca Coelho
2021-06-17  7:08 ` [PATCH 07/12] iwlwifi: correct HE capabilities Luca Coelho
2021-06-17  7:08 ` [PATCH 08/12] iwlwifi: mvm: support LMR feedback Luca Coelho
2021-06-17  7:08 ` [PATCH 09/12] iwlwifi: advertise broadcast TWT support Luca Coelho
2021-06-22 12:19   ` Luca Coelho
2021-06-17  7:08 ` [PATCH 10/12] iwlwifi: pcie: fix some kernel-doc comments Luca Coelho
2021-06-17  7:08 ` [PATCH 11/12] iwlwifi: pcie: remove TR/CR tail allocations Luca Coelho
2021-06-17  7:43   ` Johannes Berg
2021-06-17  8:07     ` [PATCH v2 " Luca Coelho
2021-06-22 12:20       ` Luca Coelho [this message]
2021-06-17  7:08 ` [PATCH 12/12] iwlwifi: mvm: Read acpi dsm to get unii4 enable/disable bitmap Luca Coelho
2021-06-22 12:21   ` Luca Coelho

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