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| author |   Arnd Bergmann <arnd@arndb.de> | 2013-06-03 15:24:53 +0200 |
|---|---|---|
| committer |   Mark Brown <broonie@linaro.org> | 2013-06-03 15:28:34 +0100 |
| commit | 804ae4380d1e76f5d81272b8a3b765f5e02fe46e (patch) | |
| tree | c3d22e7c5de2f40809306bcd0416bb9a1fb225dc /drivers/spi/spi-sirf.c | |
| parent | spi: fix build break in spi-fsl-espi.c (diff) | |
| download | linux-dev-804ae4380d1e76f5d81272b8a3b765f5e02fe46e.tar.xz linux-dev-804ae4380d1e76f5d81272b8a3b765f5e02fe46e.zip | |
spi: sirf: avoid uninitialized-use warning
24778be20 "spi: convert drivers to use bits_per_word_mask"
removed the "default" statement in the spi_sirfsoc_setup_transfer
switch, causing a new warning:
drivers/spi/spi-sirf.c: In function 'spi_sirfsoc_setup_transfer':
arch/arm/include/asm/io.h:90:2: warning: 'rxfifo_ctrl' may be used uninitialized in this function [-Wmaybe-uninitialized]
asm volatile("str %1, %0"
^
drivers/spi/spi-sirf.c:364:19: note: 'rxfifo_ctrl' was declared here
u32 txfifo_ctrl, rxfifo_ctrl;
^
The compiler has correctly identified that this case may happen,
but since we know that things are horribly broken if bits_per_word
is ever something other than the values we tested, calling BUG()
is an appropriate action and tells the compiler that execution
will not continue afterwards.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Stephen Warren <swarren@wwwdotorg.org>
Cc: Mark Brown <broonie@kernel.org>
Signed-off-by: Mark Brown <broonie@linaro.org>
Diffstat (limited to 'drivers/spi/spi-sirf.c')
| -rw-r--r-- | drivers/spi/spi-sirf.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/spi/spi-sirf.c b/drivers/spi/spi-sirf.c index 77497be042a8..e262736f9163 100644 --- a/drivers/spi/spi-sirf.c +++ b/drivers/spi/spi-sirf.c @@ -425,6 +425,8 @@ spi_sirfsoc_setup_transfer(struct spi_device *spi, struct spi_transfer *t) rxfifo_ctrl = SIRFSOC_SPI_FIFO_THD(SIRFSOC_SPI_FIFO_SIZE / 2) | SIRFSOC_SPI_FIFO_WIDTH_DWORD; break; + default: + BUG(); } if (!(spi->mode & SPI_CS_HIGH)) |