From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932189AbWEPVnM (ORCPT ); Tue, 16 May 2006 17:43:12 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932184AbWEPVnL (ORCPT ); Tue, 16 May 2006 17:43:11 -0400 Received: from mail.kroah.org ([69.55.234.183]:31918 "EHLO perch.kroah.org") by vger.kernel.org with ESMTP id S932181AbWEPVkm (ORCPT ); Tue, 16 May 2006 17:40:42 -0400 From: Greg KH To: linux-kernel@vger.kernel.org Cc: David Brownell , David Brownell , Greg Kroah-Hartman Subject: [PATCH 04/10] SPI: spi bounce buffer has a minimum length Reply-To: Greg KH Date: Tue, 16 May 2006 14:38:32 -0700 Message-Id: <1147815518897-git-send-email-greg@kroah.com> X-Mailer: git-send-email 1.3.2 In-Reply-To: <11478155181381-git-send-email-greg@kroah.com> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org From: David Brownell Make sure that spi_write_then_read() can always handle at least 32 bytes of transfer (total, both directions), minimizing one portability issue. Signed-off-by: David Brownell Signed-off-by: Greg Kroah-Hartman --- drivers/spi/spi.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-) a9948b6194b46e489aa3b4d111d6dfd786c39c4b diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index 94f5e8e..1168ef0 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -522,7 +522,8 @@ int spi_sync(struct spi_device *spi, str } EXPORT_SYMBOL_GPL(spi_sync); -#define SPI_BUFSIZ (SMP_CACHE_BYTES) +/* portable code must never pass more than 32 bytes */ +#define SPI_BUFSIZ max(32,SMP_CACHE_BYTES) static u8 *buf; -- 1.3.2