From patchwork Mon Jul 22 14:18:22 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ma Ke X-Patchwork-Id: 813889 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 09DFE1D555; Mon, 22 Jul 2024 14:18:58 +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=1721657942; cv=none; b=QyPa3wzfD+JT/4+J+NqMQeiRWShVuxe8giokgA/JTGWmX6V3LXxEV+cBqpVqF40UCgz4Ljbi+G1wAxVTA37QbSt5JxSEhnRHK9jEMTk/hh2m16qNJqegPg7nldstVA/yCHJDSsKRYzrfP8uc+ixFMJctyDHPLatDyin3kuS31g0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721657942; c=relaxed/simple; bh=Xbs3UoWOYGOngJPTQG/teNnhaR6M0GSk/kW8lB9VjU0=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=kUR7PEjisStdsGXQ2wBVOo/EB2k1Fw9pvvQSiq5rUSPlLnxECqqStEw/vjO9f+zssCqjQQGADKBzrDQ7L89Ow5a4OTJvCDFTzhmSwSuiysuw+JHfhGepquj72YZ+00CWcBQrxs6KdRTplmohvrkxqW9U9rhVh0snls+UcSSGt/8= 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 icess-ProLiant-DL380-Gen10.. (unknown [183.174.60.14]) by APP-05 (Coremail) with SMTP id zQCowAB3XTg1ap5mDvtiAA--.21150S2; Mon, 22 Jul 2024 22:18:32 +0800 (CST) From: Ma Ke To: broonie@kernel.org, jwboyer@linux.vnet.ibm.com, dbrownell@users.sourceforge.net, sfalco@harris.com, akpm@linux-foundation.org, sr@denx.de Cc: linux-spi@vger.kernel.org, linux-kernel@vger.kernel.org, Ma Ke Subject: [PATCH v3] spi: ppc4xx: handle irq_of_parse_and_map() errors Date: Mon, 22 Jul 2024 22:18:22 +0800 Message-Id: <20240722141822.1052370-1-make24@iscas.ac.cn> X-Mailer: git-send-email 2.25.1 Precedence: bulk X-Mailing-List: linux-spi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-CM-TRANSID: zQCowAB3XTg1ap5mDvtiAA--.21150S2 X-Coremail-Antispam: 1UD129KBjvdXoW7JrWfuF17Kr4DCr4kZF43KFg_yoWfurb_Cw 4fZr4I9rWUCrnaka4UKr4fAryF9398Xw1vvr92qF9xtrZ8GFnFv34IvF1UXay09w4UGF12 kwnrZa45ZrnIqjkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUbVxFF20E14v26r4j6ryUM7CY07I20VC2zVCF04k26cxKx2IYs7xG 6rWj6s0DM7CIcVAFz4kK6r1j6r18M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8w A2z4x0Y4vE2Ix0cI8IcVAFwI0_Jr0_JF4l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Gr0_ Cr1l84ACjcxK6I8E87Iv67AKxVW0oVCq3wA2z4x0Y4vEx4A2jsIEc7CjxVAFwI0_GcCE3s 1lnxkEFVAIw20F6cxK64vIFxWle2I262IYc4CY6c8Ij28IcVAaY2xG8wAqx4xG64xvF2IE w4CE5I8CrVC2j2WlYx0E2Ix0cI8IcVAFwI0_JrI_JrylYx0Ex4A2jsIE14v26r1j6r4UMc vjeVCFs4IE7xkEbVWUJVW8JwACjcxG0xvY0x0EwIxGrwACjI8F5VA0II8E6IAqYI8I648v 4I1lc7CjxVAaw2AFwI0_Jw0_GFyl42xK82IYc2Ij64vIr41l4I8I3I0E4IkC6x0Yz7v_Jr 0_Gr1lx2IqxVAqx4xG67AKxVWUJVWUGwC20s026x8GjcxK67AKxVWUGVWUWwC2zVAF1VAY 17CE14v26r1q6r43MIIYrxkI7VAKI48JMIIF0xvE2Ix0cI8IcVAFwI0_Jr0_JF4lIxAIcV C0I7IYx2IY6xkF7I0E14v26r1j6r4UMIIF0xvE42xK8VAvwI8IcIk0rVWUJVWUCwCI42IY 6I8E87Iv67AKxVWUJVW8JwCI42IY6I8E87Iv6xkF7I0E14v26r4j6r4UJbIYCTnIWIevJa 73UjIFyTuYvjfUF0eHDUUUU X-CM-SenderInfo: ppdnvj2u6l2u1dvotugofq/ Zero and negative number is not a valid IRQ for in-kernel code and the irq_of_parse_and_map() function returns zero on error. So this check for valid IRQs should only accept values > 0. Fixes: 44dab88e7cc9 ("spi: add spi_ppc4xx driver") Signed-off-by: Ma Ke --- Changes in v3: - removed Cc stable line as suggestions. Changes in v2: - added Cc stable line; - added Fixes line. --- drivers/spi/spi-ppc4xx.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/spi/spi-ppc4xx.c b/drivers/spi/spi-ppc4xx.c index 01fdecbf132d..599c29a31269 100644 --- a/drivers/spi/spi-ppc4xx.c +++ b/drivers/spi/spi-ppc4xx.c @@ -416,6 +416,9 @@ static int spi_ppc4xx_of_probe(struct platform_device *op) if (hw->irqnum <= 0) goto free_host; + if (hw->irqnum <= 0) + goto free_host; + ret = request_irq(hw->irqnum, spi_ppc4xx_int, 0, "spi_ppc4xx_of", (void *)hw); if (ret) {