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| author | Stephan Gerhold <stephan@gerhold.net> | 2021-12-06 12:45:42 +0100 |
|---|---|---|
| committer | Georgi Djakov <djakov@kernel.org> | 2021-12-06 18:52:19 +0100 |
| commit | a7d9436a6c85fcb8843c910fd323dcd7f839bf63 (patch) | |
| tree | 331e678bc7e0c21862b565dcd3ed08541a352217 /drivers/interconnect | |
| parent | interconnect: icc-rpm: Use NOC_QOS_MODE_INVALID for qos_mode check (diff) | |
| download | linux-a7d9436a6c85fcb8843c910fd323dcd7f839bf63.tar.xz linux-a7d9436a6c85fcb8843c910fd323dcd7f839bf63.zip | |
interconnect: qcom: rpm: Prevent integer overflow in rate
Using icc-rpm on ARM32 currently results in clk_set_rate() errors during
boot, e.g. "bus clk_set_rate error: -22". This is very similar to commit
7381e27b1e56 ("interconnect: qcom: msm8974: Prevent integer overflow in rate")
where the u64 is converted to a signed long during clock rate rounding,
resulting in an overflow on 32-bit platforms.
Let's fix it similarly by making sure that the rate does not exceed
LONG_MAX. Such high clock rates will surely result in the maximum
frequency of the bus anyway.
Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
Link: https://lore.kernel.org/r/20211206114542.45325-1-stephan@gerhold.net
Signed-off-by: Georgi Djakov <djakov@kernel.org>
Diffstat (limited to 'drivers/interconnect')
| -rw-r--r-- | drivers/interconnect/qcom/icc-rpm.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/interconnect/qcom/icc-rpm.c b/drivers/interconnect/qcom/icc-rpm.c index 35888721a690..6fa56c930bd1 100644 --- a/drivers/interconnect/qcom/icc-rpm.c +++ b/drivers/interconnect/qcom/icc-rpm.c @@ -239,6 +239,7 @@ static int qcom_icc_set(struct icc_node *src, struct icc_node *dst) rate = max(sum_bw, max_peak_bw); do_div(rate, qn->buswidth); + rate = min_t(u64, rate, LONG_MAX); if (qn->rate == rate) return 0; |