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Wed, 03 Oct 2018 19:41:16 -0700 (PDT) From: Nathan Chancellor To: Mark Brown Cc: linux-spi@vger.kernel.org, linux-kernel@vger.kernel.org, Nick Desaulniers , Nathan Chancellor Subject: [PATCH v2] spi: spi-ep93xx: Change dir type in ep93xx_spi_dma_{finish,prepare} Date: Wed, 3 Oct 2018 19:40:11 -0700 Message-Id: <20181004024010.15986-1-natechancellor@gmail.com> X-Mailer: git-send-email 2.19.0 In-Reply-To: <20181004023926.15847-1-natechancellor@gmail.com> References: <20181004023926.15847-1-natechancellor@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Clang warns when one enumerated type is implicitly converted to another. drivers/spi/spi-ep93xx.c:342:62: warning: implicit conversion from enumeration type 'enum dma_transfer_direction' to different enumeration type 'enum dma_data_direction' [-Wenum-conversion] nents = dma_map_sg(chan->device->dev, sgt->sgl, sgt->nents, dir); ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~ ./include/linux/dma-mapping.h:428:58: note: expanded from macro 'dma_map_sg' #define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, 0) ~~~~~~~~~~~~~~~~ ^ drivers/spi/spi-ep93xx.c:348:57: warning: implicit conversion from enumeration type 'enum dma_transfer_direction' to different enumeration type 'enum dma_data_direction' [-Wenum-conversion] dma_unmap_sg(chan->device->dev, sgt->sgl, sgt->nents, dir); ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~ ./include/linux/dma-mapping.h:429:62: note: expanded from macro 'dma_unmap_sg' #define dma_unmap_sg(d, s, n, r) dma_unmap_sg_attrs(d, s, n, r, 0) ~~~~~~~~~~~~~~~~~~ ^ drivers/spi/spi-ep93xx.c:377:56: warning: implicit conversion from enumeration type 'enum dma_transfer_direction' to different enumeration type 'enum dma_data_direction' [-Wenum-conversion] dma_unmap_sg(chan->device->dev, sgt->sgl, sgt->nents, dir); ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~ ./include/linux/dma-mapping.h:429:62: note: expanded from macro 'dma_unmap_sg' #define dma_unmap_sg(d, s, n, r) dma_unmap_sg_attrs(d, s, n, r, 0) ~~~~~~~~~~~~~~~~~~ ^ 3 warnings generated. dma_{,un}map_sg expects an enum of type dma_data_direction but this driver uses dma_transfer_direction for everything. Converting to dma_data_direction would be desirable but there are a few shared structures that expect dma_transfer_direction so it is just simpler to change the parameter here. dma_transfer_direction and dma_data_direction are different sizes but this driver only uses the 1 and 2 values which mean the same thing so this change is safe. Signed-off-by: Nathan Chancellor --- v1 -> v2: * Fix escaped hash symbols for '#define' lines drivers/spi/spi-ep93xx.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/drivers/spi/spi-ep93xx.c b/drivers/spi/spi-ep93xx.c index f1526757aaf6..189fc2225b69 100644 --- a/drivers/spi/spi-ep93xx.c +++ b/drivers/spi/spi-ep93xx.c @@ -256,8 +256,7 @@ static int ep93xx_spi_read_write(struct spi_master *master) * in case of failure. */ static struct dma_async_tx_descriptor * -ep93xx_spi_dma_prepare(struct spi_master *master, - enum dma_transfer_direction dir) +ep93xx_spi_dma_prepare(struct spi_master *master, int dir) { struct ep93xx_spi *espi = spi_master_get_devdata(master); struct spi_transfer *xfer = master->cur_msg->state; @@ -359,8 +358,7 @@ ep93xx_spi_dma_prepare(struct spi_master *master, * Function finishes with the DMA transfer. After this, the DMA buffer is * unmapped. */ -static void ep93xx_spi_dma_finish(struct spi_master *master, - enum dma_transfer_direction dir) +static void ep93xx_spi_dma_finish(struct spi_master *master, int dir) { struct ep93xx_spi *espi = spi_master_get_devdata(master); struct dma_chan *chan; -- 2.19.0