Since Linux v4.10 release (commit 1d9174fbc55e "PM / Runtime: Defer resuming of the device in pm_runtime_force_resume()"), pm_runtime_force_resume() function doesn't runtime resume device if it was not runtime active before system suspend. Thus, driver should not do any register access after pm_runtime_force_resume() without checking the runtime status of the device. To fix this issue, simply move s3c64xx_spi_hwinit() call to s3c64xx_spi_runtime_resume() to ensure that hardware is always properly initialized. This fixes Synchronous external abort issue on system suspend/resume cycle on newer Exynos SoCs. Signed-off-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx> CC: <stable@xxxxxxxxxxxxxxx> # 4.10.x: 1c75862d8e5a spi: spi-s3c64xx: Remove unused s3c64xx_spi_hwinit() CC: <stable@xxxxxxxxxxxxxxx> # 4.10.x Reviewed-by: Krzysztof Kozlowski <krzk@xxxxxxxxxx> Acked-by: Andi Shyti <andi@xxxxxxxxxxx> --- Resend reason: added cc: stable, reviewed and acked tags --- drivers/spi/spi-s3c64xx.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c index f55dc78957ad..7b7151ec14c8 100644 --- a/drivers/spi/spi-s3c64xx.c +++ b/drivers/spi/spi-s3c64xx.c @@ -1292,8 +1292,6 @@ static int s3c64xx_spi_resume(struct device *dev) if (ret < 0) return ret; - s3c64xx_spi_hwinit(sdd); - return spi_master_resume(master); } #endif /* CONFIG_PM_SLEEP */ @@ -1331,6 +1329,8 @@ static int s3c64xx_spi_runtime_resume(struct device *dev) if (ret != 0) goto err_disable_src_clk; + s3c64xx_spi_hwinit(sdd); + return 0; err_disable_src_clk: -- 2.17.0 -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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