5.4-stable review patch. If anyone has any objections, please let me know.
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From: Dan Carpenter dan.carpenter@linaro.org
[ Upstream commit 78261cb08f06c93d362cab5c5034bf5899bc7552 ]
This loop is supposed to break if the frequency returned from clk_round_rate() is the same as on the previous iteration. However, that check doesn't make sense on the first iteration through the loop. It leads to reading before the start of these->clk_perf_tbl[] array.
Fixes: eddac5af0654 ("soc: qcom: Add GENI based QUP Wrapper driver") Signed-off-by: Dan Carpenter dan.carpenter@linaro.org Link: https://lore.kernel.org/r/8cd12678-f44a-4b16-a579-c8f11175ee8c@stanley.mount... Signed-off-by: Bjorn Andersson andersson@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/soc/qcom/qcom-geni-se.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/soc/qcom/qcom-geni-se.c b/drivers/soc/qcom/qcom-geni-se.c index 2e66098e82975..d6115e3ce65fa 100644 --- a/drivers/soc/qcom/qcom-geni-se.c +++ b/drivers/soc/qcom/qcom-geni-se.c @@ -550,7 +550,8 @@ int geni_se_clk_tbl_get(struct geni_se *se, unsigned long **tbl)
for (i = 0; i < MAX_CLK_PERF_LEVEL; i++) { freq = clk_round_rate(se->clk, freq + 1); - if (freq <= 0 || freq == se->clk_perf_tbl[i - 1]) + if (freq <= 0 || + (i > 0 && freq == se->clk_perf_tbl[i - 1])) break; se->clk_perf_tbl[i] = freq; }