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authorArnd Bergmann <arnd@arndb.de>2016-10-25 23:57:10 +0300
committerMark Brown <broonie@kernel.org>2016-10-26 13:14:52 +0300
commit5c0ba57744b1422d528f19430dd66d6803cea86f (patch)
treec0d2696dc0d1d5f68a783e7f84f4dc8e23864633 /drivers/spi
parent1001354ca34179f3db924eb66672442a173147dc (diff)
downloadlinux-5c0ba57744b1422d528f19430dd66d6803cea86f.tar.xz
spi: fsl-espi: avoid processing uninitalized data on error
When we get a spurious interrupt in fsl_espi_irq, we end up processing four uninitalized bytes of data, as shown in this warning message: drivers/spi/spi-fsl-espi.c: In function 'fsl_espi_irq': drivers/spi/spi-fsl-espi.c:462:4: warning: 'rx_data' may be used uninitialized in this function [-Wmaybe-uninitialized] This adds another check so we skip the data in this case. Fixes: 6319a68011b8 ("spi/fsl-espi: avoid infinite loops on fsl_espi_cpu_irq()") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Mark Brown <broonie@kernel.org> Cc: stable@vger.kernel.org
Diffstat (limited to 'drivers/spi')
-rw-r--r--drivers/spi/spi-fsl-espi.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/spi/spi-fsl-espi.c b/drivers/spi/spi-fsl-espi.c
index 7451585a080e..2c175b9495f7 100644
--- a/drivers/spi/spi-fsl-espi.c
+++ b/drivers/spi/spi-fsl-espi.c
@@ -458,7 +458,7 @@ static void fsl_espi_cpu_irq(struct mpc8xxx_spi *mspi, u32 events)
mspi->len -= rx_nr_bytes;
- if (mspi->rx)
+ if (rx_nr_bytes && mspi->rx)
mspi->get_rx(rx_data, mspi);
}