From patchwork Wed Dec 1 15:38:04 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?M=C3=A5rten_Lindahl?= X-Patchwork-Id: 520121 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3ECF2C433FE for ; Wed, 1 Dec 2021 15:38:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1351086AbhLAPlw (ORCPT ); Wed, 1 Dec 2021 10:41:52 -0500 Received: from smtp2.axis.com ([195.60.68.18]:17640 "EHLO smtp2.axis.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1350676AbhLAPlv (ORCPT ); Wed, 1 Dec 2021 10:41:51 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=axis.com; q=dns/txt; s=axis-central1; t=1638373111; x=1669909111; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=NeRpLsWyPIeNTXYAGIU96z1OBWXWfVQIvsePl4gHj9M=; b=fHASomY4GU3ZzBQf75XYjJSL/37kC//KhEbSXDndOjDr2prdja1/2bSc 3WVT1ITxEA+QNLMP3EHjW6qN+lW0XJtKz5f3CH8bLmBH09PsAKaEU8UB4 89K4/JFLdIhkwaoUkhKmACGIyhAfwN2+QmGeS4DvLFz74mvMTmj0UsH6v 0BW9In852l7J69hUdg1DL0YMmrxBJ08h1XUJNrmur60K6nvSdDrCaOXIL RbOLtcTbTb6DuXn3/pMJkYWHTGsAoFNEu6lb9fyF7CdHuE0Up3pPgU6V5 1ii7sUNarz5+k4/TZyF2C7tpODHW6ipIuEnzqU+xuMTsY9PTkMCvVJDDv w==; From: =?utf-8?q?M=C3=A5rten_Lindahl?= To: Ulf Hansson , Rob Herring , Krzysztof Kozlowski , Jaehoon Chung CC: Doug Anderson , , , , , , =?utf-8?q?M=C3=A5rten_Lindahl?= Subject: [PATCH 4/4] mmc: dw_mmc: Do not wait for DTO in case of error Date: Wed, 1 Dec 2021 16:38:04 +0100 Message-ID: <20211201153804.27655-5-marten.lindahl@axis.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20211201153804.27655-1-marten.lindahl@axis.com> References: <20211201153804.27655-1-marten.lindahl@axis.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org When running the ARTPEC-8 DWMMC IP version, and a data error interrupt comes during a data read transfer, there is no guarantee for the data transfer over interrupt (DTO) to come within the specified data timeout. This case is handled by the dto_timer handler which will complete the request with the comment: /* * If DTO interrupt does NOT come in sending data state, * we should notify the driver to terminate current transfer * and report a data timeout to the core. */ But since the ARTPEC-8 DWMMC IP version, supports an extended TMOUT register which allows longer timeouts than the non ARTPEC-8 version does, waiting for the dto_timer to complete the request in error cases may cause the request to take significantly longer time than necessary. This is specifically true for the failing steps during tuning of a device. Fix this by completing the request when the error interrupt comes. Signed-off-by: Mårten Lindahl --- drivers/mmc/host/dw_mmc.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c index 45ea9fd97a6a..d6b76f47b1a2 100644 --- a/drivers/mmc/host/dw_mmc.c +++ b/drivers/mmc/host/dw_mmc.c @@ -2777,11 +2777,19 @@ static irqreturn_t dw_mci_interrupt(int irq, void *dev_id) if (pending & DW_MCI_DATA_ERROR_FLAGS) { spin_lock(&host->irq_lock); + if (host->quirks & DW_MMC_QUIRK_EXTENDED_TMOUT) + del_timer(&host->dto_timer); + /* if there is an error report DATA_ERROR */ mci_writel(host, RINTSTS, DW_MCI_DATA_ERROR_FLAGS); host->data_status = pending; smp_wmb(); /* drain writebuffer */ set_bit(EVENT_DATA_ERROR, &host->pending_events); + + if (host->quirks & DW_MMC_QUIRK_EXTENDED_TMOUT) + /* In case of error, we cannot expect a DTO */ + set_bit(EVENT_DATA_COMPLETE, &host->pending_events); + tasklet_schedule(&host->tasklet); spin_unlock(&host->irq_lock);