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Thu, 23 May 2019 11:19:48 +1200 Received: from chrisp-dl.ws.atlnz.lc (chrisp-dl.ws.atlnz.lc [10.33.22.30]) by smtp (Postfix) with ESMTP id 245BD13EEB6; Thu, 23 May 2019 11:19:51 +1200 (NZST) Received: by chrisp-dl.ws.atlnz.lc (Postfix, from userid 1030) id 792F51E1D5B; Thu, 23 May 2019 11:19:50 +1200 (NZST) From: Chris Packham To: dwmw2@infradead.org, computersforpeace@gmail.com, marek.vasut@gmail.com, miquel.raynal@bootlin.com, richard@nod.at, vigneshr@ti.com Subject: [PATCH v2 2/2] mtd: concat: implement _is_locked mtd operation Date: Thu, 23 May 2019 11:19:48 +1200 Message-Id: <20190522231948.17559-2-chris.packham@alliedtelesis.co.nz> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190522231948.17559-1-chris.packham@alliedtelesis.co.nz> References: <20190522231948.17559-1-chris.packham@alliedtelesis.co.nz> MIME-Version: 1.0 x-atlnz-ls: pat X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190522_161957_323150_BBD41574 X-CRM114-Status: GOOD ( 12.11 ) X-Spam-Score: -0.2 (/) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (-0.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 SPF_HELO_PASS SPF: HELO matches SPF record -0.0 SPF_PASS SPF: sender matches SPF record 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Chris Packham , linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org Sender: "linux-mtd" Errors-To: linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org Add an implementation of the _is_locked operation for concatenated mtd devices. This doesn't handle getting the lock status of a range that spans chips, which is consistent with cfi_ppb_is_locked and cfi_intelext_is_locked which only look at the first block in the range. Signed-off-by: Chris Packham --- Changes in v2: - Don't re-use the xxlock helper. - Explicitly disallow ranges that span chips. drivers/mtd/mtdconcat.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/drivers/mtd/mtdconcat.c b/drivers/mtd/mtdconcat.c index 6cb60dea509a..eef0612c2e94 100644 --- a/drivers/mtd/mtdconcat.c +++ b/drivers/mtd/mtdconcat.c @@ -499,6 +499,28 @@ static int concat_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len) return concat_xxlock(mtd, ofs, len, false); } +static int concat_is_locked(struct mtd_info *mtd, loff_t ofs, uint64_t len) +{ + struct mtd_concat *concat = CONCAT(mtd); + int i, err = -EINVAL; + + for (i = 0; i < concat->num_subdev; i++) { + struct mtd_info *subdev = concat->subdev[i]; + + if (ofs >= subdev->size) { + ofs -= subdev->size; + continue; + } + + if (ofs + len > subdev->size) + break; + + return mtd_is_locked(subdev, ofs, len); + } + + return err; +} + static void concat_sync(struct mtd_info *mtd) { struct mtd_concat *concat = CONCAT(mtd); @@ -698,6 +720,7 @@ struct mtd_info *mtd_concat_create(struct mtd_info *subdev[], /* subdevices to c concat->mtd._sync = concat_sync; concat->mtd._lock = concat_lock; concat->mtd._unlock = concat_unlock; + concat->mtd._is_locked = concat_is_locked; concat->mtd._suspend = concat_suspend; concat->mtd._resume = concat_resume;