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soc: qcom: geni: Don't ignore clk_round_rate() errors in geni_se_clk_tbl_get()

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[ Upstream commit e11bbcedec ]

The function clk_round_rate() is defined to return a "long", not an
"unsigned long".  That's because it might return a negative error
code.  Change the call in geni_se_clk_tbl_get() to check for errors.

While we're at it, get rid of a useless init of "freq".

NOTE: overall the idea that we should iterate over clk_round_rate() to
try to reconstruct a table already present in the clock driver is
questionable.  Specifically:
- This method relies on "clk_round_rate()" rounding up.
- This method only works if the table is sorted and has no duplicates.
...this patch doesn't try to fix those problems, it just makes the
error handling more correct.

Fixes: eddac5af06 ("soc: qcom: Add GENI based QUP Wrapper driver")
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Douglas Anderson
2018-09-06 15:49:05 -07:00
committed by Greg Kroah-Hartman
parent b0826d4774
commit 331ed26698
1 changed files with 2 additions and 2 deletions
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4
drivers/soc/qcom/qcom-geni-se.c
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@@ -513,7 +513,7 @@ EXPORT_SYMBOL(geni_se_resources_on);
*/
int geni_se_clk_tbl_get(struct geni_se *se, unsigned long **tbl)
{
unsigned long freq = 0;
long freq = 0;
int i;
if (se->clk_perf_tbl) {
@@ -529,7 +529,7 @@ 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 || freq == se->clk_perf_tbl[i - 1])
if (freq <= 0 || freq == se->clk_perf_tbl[i - 1])
break;
se->clk_perf_tbl[i] = freq;
}