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[108.18.137.133]) by smtp.gmail.com with ESMTPSA id p16-20020a05622a13d000b002e227782e9asm17298150qtk.14.2022.03.30.09.54.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 30 Mar 2022 09:54:51 -0700 (PDT) From: Sean Anderson To: u-boot@lists.denx.de Cc: Peng Fan , Simon Glass , Jaehoon Chung , Sean Anderson Subject: [PATCH 1/4] mmc: sandbox: Initialize the status register Date: Wed, 30 Mar 2022 12:54:43 -0400 Message-Id: <20220330165446.438925-2-seanga2@gmail.com> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220330165446.438925-1-seanga2@gmail.com> References: <20220330165446.438925-1-seanga2@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.39 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: u-boot-bounces@lists.denx.de Sender: "U-Boot" X-Virus-Scanned: clamav-milter 0.103.5 at phobos.denx.de X-Virus-Status: Clean The send status command expects the status register to be returned as a response. Without writing data back, whatever is on the stack will be interpreted as the status register. There are a lot of fields in this register, but fortunately all zeros is interpreted as "we don't support anything." Signed-off-by: Sean Anderson --- drivers/mmc/sandbox_mmc.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/mmc/sandbox_mmc.c b/drivers/mmc/sandbox_mmc.c index 451fe4a4e5..35159451e1 100644 --- a/drivers/mmc/sandbox_mmc.c +++ b/drivers/mmc/sandbox_mmc.c @@ -57,6 +57,7 @@ static int sandbox_mmc_send_cmd(struct udevice *dev, struct mmc_cmd *cmd, break; case MMC_CMD_SEND_STATUS: cmd->response[0] = MMC_STATUS_RDY_FOR_DATA; + memset(data->dest, '\0', data->blocks * data->blocksize); break; case MMC_CMD_SELECT_CARD: break; -- 2.35.1