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authorArnd Bergmann <arnd@arndb.de>2017-08-10 15:13:26 +0300
committerMark Brown <broonie@kernel.org>2017-08-10 17:50:17 +0300
commit6f38f125ffc4d87768129644fb485eca7382f0b1 (patch)
tree7b1ebb71fbb65000a4001d21184aa190f0dfc3de /drivers/spi
parent4d023737b2efcaac36e4e6bbfdce3a3b377f3946 (diff)
downloadlinux-6f38f125ffc4d87768129644fb485eca7382f0b1.tar.xz
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 <arnd@arndb.de> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi')
-rw-r--r--drivers/spi/spi-qup.c4
1 files changed, 1 insertions, 3 deletions
diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
index 1364516e87c2..e9ecd67cd817 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,