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[3.16-stable,28/87] spi/pl022: Explicitly truncate large bitmask

Message ID 20170505194745.3627137-29-arnd@arndb.de
State New
Headers show
Series build warnings and errors | expand

Commit Message

Arnd Bergmann May 5, 2017, 7:46 p.m. UTC 
From: Mark Brown <broonie@linaro.org>


Commit 41b5da6383a72732f9facd2e03873c481baacb6e upstream.

When building on 64 bit architectures the use of bitwise negation generates
constants larger than 32 bits which won't fit in u32s used to represent
32 bit register values on the device. Explicitly cast to let the compiler
know that the higher bits are not significant and can be discarded.

Signed-off-by: Mark Brown <broonie@linaro.org>

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

---
 drivers/spi/spi-pl022.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

-- 
2.9.0
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Patch

diff --git a/drivers/spi/spi-pl022.c b/drivers/spi/spi-pl022.c
index 02798036df8f..53a908e4219f 100644
--- a/drivers/spi/spi-pl022.c
+++ b/drivers/spi/spi-pl022.c
@@ -1417,7 +1417,7 @@  static void do_interrupt_dma_transfer(struct pl022 *pl022)
 	 * Default is to enable all interrupts except RX -
 	 * this will be enabled once TX is complete
 	 */
-	u32 irqflags = ENABLE_ALL_INTERRUPTS & ~SSP_IMSC_MASK_RXIM;
+	u32 irqflags = (u32)(ENABLE_ALL_INTERRUPTS & ~SSP_IMSC_MASK_RXIM);
 
 	/* Enable target chip, if not already active */
 	if (!pl022->next_msg_cs_active)