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[95.91.252.233]) by smtp.gmail.com with ESMTPSA id y15sm666474eds.56.2020.12.02.12.23.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 02 Dec 2020 12:23:33 -0800 (PST) From: Bean Huo To: ulf.hansson@linaro.org, axboe@kernel.dk, baolin.wang@linaro.org, beanhuo@micron.com, arnd@arndb.de, vbadigan@codeaurora.org, richard.peng@oppo.com, chaotian.jing@mediatek.com, avri.altman@wdc.com, linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, zliua@micron.com, zszubbocsev@micron.com Cc: stable@vger.kernel.org Subject: [PATCH] mmc: block: Let CMD13 polling only for MMC IOCTLS with the R1B response Date: Wed, 2 Dec 2020 21:23:20 +0100 Message-Id: <20201202202320.22165-1-huobean@gmail.com> X-Mailer: git-send-email 2.17.1 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Bean Huo The CMD13 polling is only needed for the command with R1B Resp. For the command with R1 Resp, such as open-ended multiple block read/write (CMD18/25) commands, the device will just wait for its next paired command. There is no need to poll device status through CMD13. Meanwhile, based on the original change commit (mmc: block: Add CMD13 polling for MMC IOCTLS with R1B response), and comment in __mmc_blk_ioctl_cmd(), current code is not in line with its original purpose. So fix it with this patch. Fixes: a0d4c7eb71dd ("mmc: block: Add CMD13 polling for MMC IOCTLS with R1B response") Cc: stable@vger.kernel.org Reported-by: Zhan Liu Signed-off-by: Zhan Liu Signed-off-by: Bean Huo --- drivers/mmc/core/block.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c index 8d3df0be0355..42e27a298218 100644 --- a/drivers/mmc/core/block.c +++ b/drivers/mmc/core/block.c @@ -580,7 +580,7 @@ static int __mmc_blk_ioctl_cmd(struct mmc_card *card, struct mmc_blk_data *md, memcpy(&(idata->ic.response), cmd.resp, sizeof(cmd.resp)); - if (idata->rpmb || (cmd.flags & MMC_RSP_R1B)) { + if (idata->rpmb || (cmd.flags & MMC_RSP_R1B) == MMC_RSP_R1B) { /* * Ensure RPMB/R1B command has completed by polling CMD13 * "Send Status". -- 2.17.1