From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-17.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id ACBFAC07E95 for ; Tue, 13 Jul 2021 09:45:04 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 693C4610D1 for ; Tue, 13 Jul 2021 09:45:04 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 693C4610D1 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=mess.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Cc:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=U7st+jwjuk8Mxy9Zb5+twRwopRGoUpc6l5L2vwgHDxA=; b=fvCMTqP/0oODoc ZV0FQw40Q8yxbM5SpC02G+t6rTOio7qRxkAXeLRQjKfjtqK82d9LQKbl6ZH45hNkJnDvmOgCwY51T mZLZAuhcKgGk8gwxL/7W61+QdZKVT3tnsYIGYaTote2Dr+0yICV/deddxdvh3mEqNgx/lS7BgQpNO LkRgveBX5Wmu3Z03Dy3I6cJ2uY8zarWcVhJO3jPlS9RfJ/Yyrz63FTN5yzIsI65HXzBQWo+6A78Fu oOUyaagN1JEjOQufHby53dD0meUQ1qgKZWdG2m1w0InR8D+Y6LXpDFP2jVNrhhUgEfQekjta2oZz0 0scBgJKqym/IEWsICevw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1m3Exq-009hE2-Qf; Tue, 13 Jul 2021 09:44:30 +0000 Received: from gofer.mess.org ([88.97.38.141]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1m3ExR-009h1r-6l for linux-mtd@lists.infradead.org; Tue, 13 Jul 2021 09:44:06 +0000 Received: by gofer.mess.org (Postfix, from userid 1000) id 9DA34C64D7; Tue, 13 Jul 2021 10:44:03 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=mess.org; s=2020; t=1626169443; bh=IywHMobrUb8qp8Iq30AbYfag8Ooa+FNEbB8vW4vlP+8=; h=From:To:Subject:Date:In-Reply-To:References:From; b=otQkW/ZYaxVwo6OMaEOP92yr27/DmFSEBM837sXxCppMxBW8yJSQYAQcDPlpzlcXY paeAyQdAjOCVhyQzJpyTZUW1nPLHZsm5YKbZ9KP+HOrM8c4+6gv1/9FPAL9R14/zIT OXnmCQmDcIVgGQlaSP52e5+ZV6ueh1gHBKMdMVwJG+3crrPkoBOFwJKBMxgV6CkbKR oFOy4gbmNjIZM8la7hv6Gqz+2keakEfpOhbFoVHdWoYT3d6BNGA/or7TXgVKP6RazI U3F+OiDq/HVpixyOYlDtNZroeuq0VaJ2hPVhHeQLQOWKTO36OcXdGcXrb6Pu6srk64 BTYt2Zd+tK0rw== From: Sean Young To: linux-mtd@lists.infradead.org Subject: [PATCH 2/4] mtd: rfd_ftl: add discard support Date: Tue, 13 Jul 2021 10:44:01 +0100 Message-Id: X-Mailer: git-send-email 2.20.1 In-Reply-To: References: MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210713_024405_454669_33C2962C X-CRM114-Status: GOOD ( 12.38 ) X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-mtd" Errors-To: linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org I proposed this change 16 years ago before discard was a feature in the block layer: https://lwn.net/Articles/162776/ Now that the block layer has discard, we can finally merge this change. Signed-off-by: Sean Young --- drivers/mtd/rfd_ftl.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) diff --git a/drivers/mtd/rfd_ftl.c b/drivers/mtd/rfd_ftl.c index 7b243f2b2fa3..7f5f6d247cae 100644 --- a/drivers/mtd/rfd_ftl.c +++ b/drivers/mtd/rfd_ftl.c @@ -705,6 +705,34 @@ static int rfd_ftl_writesect(struct mtd_blktrans_dev *dev, u_long sector, char * return rc; } +static int rfd_ftl_discardsect(struct mtd_blktrans_dev *dev, + unsigned long sector, unsigned int nr_sects) +{ + struct partition *part = (struct partition *)dev; + u_long addr; + int rc; + + while (nr_sects) { + if (sector >= part->sector_count) + return -EIO; + + addr = part->sector_map[sector]; + + if (addr != -1) { + rc = mark_sector_deleted(part, addr); + if (rc) + return rc; + + part->sector_map[sector] = -1; + } + + sector++; + nr_sects--; + } + + return 0; +} + static int rfd_ftl_getgeo(struct mtd_blktrans_dev *dev, struct hd_geometry *geo) { struct partition *part = (struct partition*)dev; @@ -786,6 +814,7 @@ static struct mtd_blktrans_ops rfd_ftl_tr = { .readsect = rfd_ftl_readsect, .writesect = rfd_ftl_writesect, + .discard = rfd_ftl_discardsect, .getgeo = rfd_ftl_getgeo, .add_mtd = rfd_ftl_add_mtd, .remove_dev = rfd_ftl_remove_dev, -- 2.31.1 ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/