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authorArnd Bergmann <arnd@arndb.de>2013-06-03 17:24:53 +0400
committerMark Brown <broonie@linaro.org>2013-06-03 18:28:34 +0400
commit804ae4380d1e76f5d81272b8a3b765f5e02fe46e (patch)
treec3d22e7c5de2f40809306bcd0416bb9a1fb225dc /drivers/spi/spi-sirf.c
parent51faed692b6a76870b53415307be54b39b5d4016 (diff)
downloadlinux-804ae4380d1e76f5d81272b8a3b765f5e02fe46e.tar.xz
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.c2
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))