From 6f38f125ffc4d87768129644fb485eca7382f0b1 Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Thu, 10 Aug 2017 14:13:26 +0200 Subject: [PATCH] spi: qup: hide warning for uninitialized variable The added conditionals in this function apparently confused gcc to the point that it no longer sees the code is safe and instead shows a false-positive warning: drivers/spi/spi-qup.c: In function 'spi_qup_transfer_one': drivers/spi/spi-qup.c:507:28: error: 'tx_nents' may be used uninitialized in this function [-Werror=maybe-uninitialized] drivers/spi/spi-qup.c:464:17: note: 'tx_nents' was declared here drivers/spi/spi-qup.c:505:28: error: 'rx_nents' may be used uninitialized in this function [-Werror=maybe-uninitialized] drivers/spi/spi-qup.c:464:7: note: 'rx_nents' was declared here This moves the initialization to a place that makes it obvious to the compiler. Fixes: 5884e17ef3cb ("spi: qup: allow multiple DMA transactions per spi xfer") Signed-off-by: Arnd Bergmann Signed-off-by: Mark Brown --- drivers/spi/spi-qup.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c index 1364516..e9ecd67 100644 --- a/drivers/spi/spi-qup.c +++ b/drivers/spi/spi-qup.c @@ -427,8 +427,6 @@ static u32 spi_qup_sgl_get_nents_len(struct scatterlist *sgl, u32 max, struct scatterlist *sg; u32 total = 0; - *nents = 0; - for (sg = sgl; sg; sg = sg_next(sg)) { unsigned int len = sg_dma_len(sg); @@ -461,7 +459,7 @@ static int spi_qup_do_dma(struct spi_device *spi, struct spi_transfer *xfer, tx_sgl = xfer->tx_sg.sgl; do { - u32 rx_nents, tx_nents; + u32 rx_nents = 0, tx_nents = 0; if (rx_sgl) qup->n_words = spi_qup_sgl_get_nents_len(rx_sgl, -- 2.7.4