From: Arnd Bergmann Date: Tue, 25 Oct 2016 20:57:10 +0000 (+0200) Subject: spi: fsl-espi: avoid processing uninitalized data on error X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=5c0ba57744b1422d528f19430dd66d6803cea86f;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git 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 Signed-off-by: Mark Brown Cc: stable@vger.kernel.org --- 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); }