Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754369AbbKLSfN (ORCPT ); Thu, 12 Nov 2015 13:35:13 -0500 Received: from mail-wm0-f49.google.com ([74.125.82.49]:33307 "EHLO mail-wm0-f49.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751769AbbKLSfL (ORCPT ); Thu, 12 Nov 2015 13:35:11 -0500 From: =?UTF-8?q?Matias=20Bj=C3=B8rling?= To: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org Cc: axboe@fb.com, geert@linux-m68k.org, =?UTF-8?q?Matias=20Bj=C3=B8rling?= Subject: [PATCH] lightnvm: change max_phys_sect to ushort Date: Thu, 12 Nov 2015 19:35:00 +0100 Message-Id: <1447353300-26027-1-git-send-email-m@bjorling.me> X-Mailer: git-send-email 2.1.4 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1078 Lines: 32 The max_phys_sect variable is defined as a char. We do a boundary check to maximally allow 256 physical page descriptors per command. As we are not indexing from zero. This expression is always in false. Bump the max_phys_sect to an unsigned short to support the range check. Signed-off-by: Matias Bjørling Reported-by: Geert Uytterhoeven --- include/linux/lightnvm.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h index 69c9057..4b1cd3d 100644 --- a/include/linux/lightnvm.h +++ b/include/linux/lightnvm.h @@ -220,7 +220,7 @@ struct nvm_dev_ops { nvm_dev_dma_alloc_fn *dev_dma_alloc; nvm_dev_dma_free_fn *dev_dma_free; - uint8_t max_phys_sect; + unsigned int max_phys_sect; }; struct nvm_lun { -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/