From mboxrd@z Thu Jan 1 00:00:00 1970 From: Michal Suchanek Subject: [PATCH v5 10/10] spi: m25p80: read in spi_max_transfer_size chunks Date: 1 Dec 2015 16:51:06 -0000 Message-ID: <3b5bdc1fd88b1f18cddc926f85fb79c158e8f4eb.1448988089.git.hramrach@gmail.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Heiner Kallweit , David Woodhouse , Brian Norris , Han Xu , Mark Brown , Michal Suchanek , Boris Brezillon , Javier Martinez Canillas , Stephen Warren , "Andrew F. Davis" , Marek Vasut , "Rafał Miłecki" , Mika Westerberg , Gabor Juhos , "Bean Huo 霍斌斌 " , Furquan Shaikh , linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org, linux-spi@vger.kernel.org, Return-path: In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-mtd" Errors-To: linux-mtd-bounces+gldm-linux-mtd-36=gmane.org@lists.infradead.org List-Id: linux-spi.vger.kernel.org Take into account transfer size limitation of SPI master. Signed-off-by: Michal Suchanek --- drivers/mtd/devices/m25p80.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/mtd/devices/m25p80.c b/drivers/mtd/devices/m25p80.c index 58ecfa4..4f21755 100644 --- a/drivers/mtd/devices/m25p80.c +++ b/drivers/mtd/devices/m25p80.c @@ -150,7 +150,10 @@ static ssize_t m25p80_read(struct spi_nor *nor, loff_t from, size_t len, t[1].rx_buf = buf; t[1].rx_nbits = m25p80_rx_nbits(nor); - t[1].len = len; + if (spi_max_transfer_size(spi)) + t[1].len = min_t(size_t, len, spi_max_transfer_size(spi)); + else + t[1].len = len; spi_message_add_tail(&t[1], &m); ret = spi_sync(spi, &m); -- 2.6.2 ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/