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| author | Arnd Bergmann <arnd@arndb.de> | 2017-08-10 14:13:26 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2017-08-10 15:50:17 +0100 |
| commit | 6f38f125ffc4d87768129644fb485eca7382f0b1 (patch) | |
| tree | 7b1ebb71fbb65000a4001d21184aa190f0dfc3de | |
| parent | 4d023737b2efcaac36e4e6bbfdce3a3b377f3946 (diff) | |
| download | linux-6f38f125ffc4d87768129644fb485eca7382f0b1.tar.bz2 | |
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>
| -rw-r--r-- | drivers/spi/spi-qup.c | 4 |
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, |