From: Ben Dooks Date: Tue, 24 Sep 2024 13:40:08 +0000 (+0100) Subject: spi: s3c64xx: fix timeout counters in flush_fifo X-Git-Tag: v6.12~239^2~1 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=68a16708d2503b6303d67abd43801e2ca40c208d;p=platform%2Fkernel%2Flinux-amlogic.git spi: s3c64xx: fix timeout counters in flush_fifo In the s3c64xx_flush_fifo() code, the loops counter is post-decremented in the do { } while(test && loops--) condition. This means the loops is left at the unsigned equivalent of -1 if the loop times out. The test after will never pass as if tests for loops == 0. Signed-off-by: Ben Dooks Fixes: 230d42d422e7 ("spi: Add s3c64xx SPI Controller driver") Reviewed-by: Andi Shyti Link: https://patch.msgid.link/20240924134009.116247-2-ben.dooks@codethink.co.uk Signed-off-by: Mark Brown --- diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c index 51a002b3f518..8c9e5e97041f 100644 --- a/drivers/spi/spi-s3c64xx.c +++ b/drivers/spi/spi-s3c64xx.c @@ -245,7 +245,7 @@ static void s3c64xx_flush_fifo(struct s3c64xx_spi_driver_data *sdd) loops = msecs_to_loops(1); do { val = readl(regs + S3C64XX_SPI_STATUS); - } while (TX_FIFO_LVL(val, sdd) && loops--); + } while (TX_FIFO_LVL(val, sdd) && --loops); if (loops == 0) dev_warn(&sdd->pdev->dev, "Timed out flushing TX FIFO\n"); @@ -258,7 +258,7 @@ static void s3c64xx_flush_fifo(struct s3c64xx_spi_driver_data *sdd) readl(regs + S3C64XX_SPI_RX_DATA); else break; - } while (loops--); + } while (--loops); if (loops == 0) dev_warn(&sdd->pdev->dev, "Timed out flushing RX FIFO\n");