From nobody Sun Feb 8 09:22:22 2026 Received: from cstnet.cn (smtp84.cstnet.cn [159.226.251.84]) (using TLSv1.2 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3286D23372A; Wed, 2 Apr 2025 07:56:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=159.226.251.84 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743580617; cv=none; b=dE9amoITgBEtSlGWo1PLumWlhaXuH5c5FNsNYFQgjLw2Stnhpu9kujuBE8FwdMvoBglgHef8aRr6gwYsJMTTuQVDBFS7acUnvgPfnTFqa2Xb7jXTJNlINUUIvwiaNNB/XK0Qm/uvuns+Mo8kC8e+fCGXAn4knJiY8mCf9x3PxNk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743580617; c=relaxed/simple; bh=E0mIWVHqstggdCCEUNjgt5beUCWykV4BPxOx5MBphX8=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=imxg4uDNxe207jxwylI+tINZc5zkTssLXIlob3UlIWfUI2hKiFUlBRuSQA0rQzNDXuEwFZWIEdjgCdnymvkLUvNjeRlwS8Kc6V9eCsRLh0zOkslggIQs5tjmoQ64R1QgFnB1S1wxHWLqApkawvJI76KRx2AiNlK/e+65anBD4fE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn; spf=pass smtp.mailfrom=iscas.ac.cn; arc=none smtp.client-ip=159.226.251.84 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=iscas.ac.cn Received: from localhost.localdomain (unknown [124.16.141.245]) by APP-05 (Coremail) with SMTP id zQCowACX1g647exnhj0VBQ--.33136S2; Wed, 02 Apr 2025 15:56:42 +0800 (CST) From: Wentao Liang To: maximlevitsky@gmail.com, miquel.raynal@bootlin.com, richard@nod.at, vigneshr@ti.com Cc: linux-kernel@vger.kernel.org, linux-mtd@lists.infradead.org, Wentao Liang , stable@vger.kernel.org Subject: [PATCH] mtd: rawnand: Add status chack in r852_ready() Date: Wed, 2 Apr 2025 15:56:23 +0800 Message-ID: <20250402075624.3261-1-vulab@iscas.ac.cn> X-Mailer: git-send-email 2.42.0.windows.2 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: zQCowACX1g647exnhj0VBQ--.33136S2 X-Coremail-Antispam: 1UD129KBjvdXoW7XFy5Cw1xXF4rXFyUZFy8uFg_yoWDXFXE9r 17urZ2q347Grn3u3ySka13Xr90yr4UWr18Wws0vFZ5Jay7Aa4Sqryq9FnrGr109r1vkF13 Ja1qyw4xGrs7XjkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUb4AFF20E14v26r4j6ryUM7CY07I20VC2zVCF04k26cxKx2IYs7xG 6rWj6s0DM7CIcVAFz4kK6r1j6r18M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8w A2z4x0Y4vE2Ix0cI8IcVAFwI0_Gr0_Xr1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Gr1j 6F4UJwA2z4x0Y4vEx4A2jsIE14v26r4UJVWxJr1l84ACjcxK6I8E87Iv6xkF7I0E14v26r xl6s0DM2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj 6xIIjxv20xvE14v26r1j6r18McIj6I8E87Iv67AKxVW8JVWxJwAm72CE4IkC6x0Yz7v_Jr 0_Gr1lF7xvr2IYc2Ij64vIr41lF7I21c0EjII2zVCS5cI20VAGYxC7MxkF7I0En4kS14v2 6r126r1DMxAIw28IcxkI7VAKI48JMxC20s026xCaFVCjc4AY6r1j6r4UMI8I3I0E5I8CrV AFwI0_Jr0_Jr4lx2IqxVCjr7xvwVAFwI0_JrI_JrWlx4CE17CEb7AF67AKxVWUtVW8ZwCI c40Y0x0EwIxGrwCI42IY6xIIjxv20xvE14v26r1j6r1xMIIF0xvE2Ix0cI8IcVCY1x0267 AKxVWUJVW8JwCI42IY6xAIw20EY4v20xvaj40_Jr0_JF4lIxAIcVC2z280aVAFwI0_Jr0_ Gr1lIxAIcVC2z280aVCY1x0267AKxVW8JVW8JrUvcSsGvfC2KfnxnUUI43ZEXa7VUjJ73P UUUUU== X-CM-SenderInfo: pyxotu46lvutnvoduhdfq/1tbiBgwAA2fsy5eVQwAAsI Content-Type: text/plain; charset="utf-8" In r852_ready(), the dev get from r852_get_dev() need to be checked. An unstable device should not be ready. A proper implementation can be found in r852_read_byte(). Add a status check and return 0 when it is unstable. Fixes: 50a487e7719c ("mtd: rawnand: Pass a nand_chip object to chip->dev_re= ady()") Cc: stable@vger.kernel.org # v4.20+ Signed-off-by: Wentao Liang --- drivers/mtd/nand/raw/r852.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/mtd/nand/raw/r852.c b/drivers/mtd/nand/raw/r852.c index b07c2f8b4035..918974d088cf 100644 --- a/drivers/mtd/nand/raw/r852.c +++ b/drivers/mtd/nand/raw/r852.c @@ -387,6 +387,9 @@ static int r852_wait(struct nand_chip *chip) static int r852_ready(struct nand_chip *chip) { struct r852_device *dev =3D r852_get_dev(nand_to_mtd(chip)); + if (dev->card_unstable) + return 0; + return !(r852_read_reg(dev, R852_CARD_STA) & R852_CARD_STA_BUSY); } =20 --=20 2.42.0.windows.2