[0/2] Do not flush cache when it is disabled

Message ID	20210322133645.4901-1-avri.altman@wdc.com
Headers	show Return-Path: <linux-mmc-owner@kernel.org> IronPort-SDR: GF7T1nDu3JPNS6K5qUPZKb9jQFwDhEgSFo5rF8ti+HsbwzQz+NZ7PF+hLcVKWZdb3zqZSz002W o1NoEbQr1d83feiygAEac6EYKiu2HiJj+xHJeHkECHTAk4n1k8Q/m7NdwQEC2KV54HSoTYuncT SMU2kpB6X+wzdUUGxw2oLEhKE7SF1zhjQYx86rbYDyE5i1+5dt07s3c+6+cs5Oe5akjIYFnT5K 2+BO91627tX1o09UllmoR3/thP21KjreQeZOnzMDEDK2JEB+dYvuaJMAkPaZ/bQFp07kZzkWQ9 nXI= IronPort-SDR: C1iIqvf0LM00KDhOnG9+V+8sieF+4fu8r/hSddjfzaTK62oURW6Pck7MCxzmwWIHFBYeVVrGuu 9QL4a6lwCSTZTqIQNZYCxcz7N42taHYi3qya23u1mymz4cBX1LIjsgEoPF8Xj5hVZs+zaDjH6l /JrQOM3gfv3+6ubCpEBvLcsyW8UtZaWr6LkOUgb8LO5r4NPA6ApnjdGohFHdbR8y/Dh2IgKnrK wga586CrP18qTKURSgKAvafk+2ISKqDADI33NtcTVb1cHfD8eoB2TtUcX3N3+II2EmVJeXPeuY 8J/DPk+MYPHSezJu2WhF1DpO IronPort-SDR: nBxFWyG2AfuOBL9julwH9yo4mifHmHDue+OIzD+XpENAEof5RSgeHtMWRKrNB/Nvj0Iuq4MVDj /OFmBlRxcIkL8pn80jNShvczxhVqPAVjttJKkvxUzsOBOMV2NMbnaE6E35ZFhbMvJWM+LbFxFX yRFOX10xZC3Xn/WBpMt2zif/Zamonn0G9G9hzcEpXX9FTGsdwqhzyFfFzqJ9MZAOjii1IX1sa0 byiNDqUn+gNpLLWKpjnShEniqL0TuFBYWg+04bcWNUfhZpXSPgg7I2W5kU6ed377PexekPjqT1 E4A= WDCIronportException: Internal From: Avri Altman <avri.altman@wdc.com> To: Ulf Hansson <ulf.hansson@linaro.org>, linux-mmc@vger.kernel.org Cc: Adrian Hunter <adrian.hunter@intel.com>, linux-kernel@vger.kernel.org, Avri Altman <avri.altman@wdc.com> Subject: [PATCH 0/2] Do not flush cache when it is disabled Date: Mon, 22 Mar 2021 15:36:43 +0200 Message-Id: <20210322133645.4901-1-avri.altman@wdc.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk
Series	Do not flush cache when it is disabled \| expand [0/2] Do not flush cache when it is disabled [1/2] mmc: block: Issue flush only if allowed [2/2] mmc: block: Update ext_csd.cache_ctrl if it was written

Message ID

20210322133645.4901-1-avri.altman@wdc.com

Headers

IronPort-SDR: GF7T1nDu3JPNS6K5qUPZKb9jQFwDhEgSFo5rF8ti+HsbwzQz+NZ7PF+hLcVKWZdb3zqZSz002W
	o1NoEbQr1d83feiygAEac6EYKiu2HiJj+xHJeHkECHTAk4n1k8Q/m7NdwQEC2KV54HSoTYuncT
	SMU2kpB6X+wzdUUGxw2oLEhKE7SF1zhjQYx86rbYDyE5i1+5dt07s3c+6+cs5Oe5akjIYFnT5K
	2+BO91627tX1o09UllmoR3/thP21KjreQeZOnzMDEDK2JEB+dYvuaJMAkPaZ/bQFp07kZzkWQ9
	nXI=
IronPort-SDR: C1iIqvf0LM00KDhOnG9+V+8sieF+4fu8r/hSddjfzaTK62oURW6Pck7MCxzmwWIHFBYeVVrGuu
	9QL4a6lwCSTZTqIQNZYCxcz7N42taHYi3qya23u1mymz4cBX1LIjsgEoPF8Xj5hVZs+zaDjH6l
	/JrQOM3gfv3+6ubCpEBvLcsyW8UtZaWr6LkOUgb8LO5r4NPA6ApnjdGohFHdbR8y/Dh2IgKnrK
	wga586CrP18qTKURSgKAvafk+2ISKqDADI33NtcTVb1cHfD8eoB2TtUcX3N3+II2EmVJeXPeuY
	8J/DPk+MYPHSezJu2WhF1DpO
IronPort-SDR: nBxFWyG2AfuOBL9julwH9yo4mifHmHDue+OIzD+XpENAEof5RSgeHtMWRKrNB/Nvj0Iuq4MVDj
	/OFmBlRxcIkL8pn80jNShvczxhVqPAVjttJKkvxUzsOBOMV2NMbnaE6E35ZFhbMvJWM+LbFxFX
	yRFOX10xZC3Xn/WBpMt2zif/Zamonn0G9G9hzcEpXX9FTGsdwqhzyFfFzqJ9MZAOjii1IX1sa0
	byiNDqUn+gNpLLWKpjnShEniqL0TuFBYWg+04bcWNUfhZpXSPgg7I2W5kU6ed377PexekPjqT1
	E4A=
WDCIronportException: Internal
From: Avri Altman <avri.altman@wdc.com>
To: Ulf Hansson <ulf.hansson@linaro.org>, linux-mmc@vger.kernel.org
Cc: Adrian Hunter <adrian.hunter@intel.com>,
	linux-kernel@vger.kernel.org, Avri Altman <avri.altman@wdc.com>
Subject: [PATCH 0/2] Do not flush cache when it is disabled
Date: Mon, 22 Mar 2021 15:36:43 +0200
Message-Id: <20210322133645.4901-1-avri.altman@wdc.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

Series

Do not flush cache when it is disabled | expand

Message

Avri Altman March 22, 2021, 1:36 p.m. UTC

Cache is a temporary storage space in an eMMC device. Volatile by
nature, the cache should in typical case reduce the access time compared
to an access to the main nonvolatile storage.

The cache function can be turned ON and OFF. Once OFF, the host is not
expected to issue a flush-cache command to the device.


Avri Altman (2):
  mmc: block: Issue flush only if allowed
  mmc: block: Update ext_csd.cache_ctrl if it was written

 drivers/mmc/core/block.c   | 11 +++++++++++
 drivers/mmc/core/mmc_ops.c |  4 +---
 drivers/mmc/core/mmc_ops.h |  5 +++++
 3 files changed, 17 insertions(+), 3 deletions(-)