From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754559AbbK3PDJ (ORCPT ); Mon, 30 Nov 2015 10:03:09 -0500 Received: from mail-io0-f170.google.com ([209.85.223.170]:36825 "EHLO mail-io0-f170.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754272AbbK3PDH (ORCPT ); Mon, 30 Nov 2015 10:03:07 -0500 From: Michael Welling To: Mark Brown , linux-spi@vger.kernel.org, linux-kernel@vger.kernel.org, Joseph Bell Cc: Michael Welling Subject: [PATCH] spi: omap2-mcspi: Prevent duplicate gpio_request Date: Mon, 30 Nov 2015 09:02:39 -0600 Message-Id: <1448895759-4282-1-git-send-email-mwelling@ieee.org> X-Mailer: git-send-email 2.1.4 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Occasionally the setup function will be called multiple times. Only request the gpio the first time otherwise -EBUSY will occur on subsequent calls to setup. Reported-by: Joseph Bell Signed-off-by: Michael Welling --- drivers/spi/spi-omap2-mcspi.c | 19 ++++++++++--------- 1 file changed, 10 insertions(+), 9 deletions(-) diff --git a/drivers/spi/spi-omap2-mcspi.c b/drivers/spi/spi-omap2-mcspi.c index 02aa1d0..7273820 100644 --- a/drivers/spi/spi-omap2-mcspi.c +++ b/drivers/spi/spi-omap2-mcspi.c @@ -1025,6 +1025,16 @@ static int omap2_mcspi_setup(struct spi_device *spi) spi->controller_state = cs; /* Link this to context save list */ list_add_tail(&cs->node, &ctx->cs); + + if (gpio_is_valid(spi->cs_gpio)) { + ret = gpio_request(spi->cs_gpio, dev_name(&spi->dev)); + if (ret) { + dev_err(&spi->dev, "failed to request gpio\n"); + return ret; + } + gpio_direction_output(spi->cs_gpio, + !(spi->mode & SPI_CS_HIGH)); + } } if (!mcspi_dma->dma_rx || !mcspi_dma->dma_tx) { @@ -1033,15 +1043,6 @@ static int omap2_mcspi_setup(struct spi_device *spi) return ret; } - if (gpio_is_valid(spi->cs_gpio)) { - ret = gpio_request(spi->cs_gpio, dev_name(&spi->dev)); - if (ret) { - dev_err(&spi->dev, "failed to request gpio\n"); - return ret; - } - gpio_direction_output(spi->cs_gpio, !(spi->mode & SPI_CS_HIGH)); - } - ret = pm_runtime_get_sync(mcspi->dev); if (ret < 0) return ret; -- 2.1.4