[PATCH v2 2/5] rtc: zynqmp: check calibration max value
From: Tomas Melin <hidden>
Date: 2026-01-08 12:51:30
Also in:
linux-rtc, lkml
Subsystem:
real time clock (rtc) subsystem, the rest · Maintainers:
Alexandre Belloni, Linus Torvalds
Enable check to not overflow the calibration max value. Signed-off-by: Tomas Melin <redacted> --- drivers/rtc/rtc-zynqmp.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/drivers/rtc/rtc-zynqmp.c b/drivers/rtc/rtc-zynqmp.c
index 856bc1678e7d31144f320ae9f75fc58c742a2a64..caacce3725e2ef3803ea42d40e77ceaeb7d7b914 100644
--- a/drivers/rtc/rtc-zynqmp.c
+++ b/drivers/rtc/rtc-zynqmp.c@@ -349,6 +349,11 @@ static int xlnx_rtc_probe(struct platform_device *pdev) xrtcdev->freq--; } + if (xrtcdev->freq > RTC_TICK_MASK) { + dev_err(&pdev->dev, "Invalid RTC calibration value\n"); + return -EINVAL; + } + ret = readl(xrtcdev->reg_base + RTC_CALIB_RD); if (!ret) writel(xrtcdev->freq, (xrtcdev->reg_base + RTC_CALIB_WR));
--
2.47.3