diff options
| author | Sean Anderson <seanga2@gmail.com> | 2021-09-11 20:20:00 +0300 |
|---|---|---|
| committer | Leo Yu-Chi Liang <ycliang@andestech.com> | 2021-10-07 11:08:22 +0300 |
| commit | 54d5d2d56bb6c46c996a4d249dbae3b12a7a4fac (patch) | |
| tree | 245646fa525ae5f488fac6e32653697aee35e72b /drivers/clk | |
| parent | ea67f467a43e4c8852bd1ce1bb75f5dc6c3788d1 (diff) | |
| download | u-boot-54d5d2d56bb6c46c996a4d249dbae3b12a7a4fac.tar.xz | |
clk: k210: Fix checking if ulongs are less than 0
The PLL functions take ulong arguments for rate, but still check if that
rate is negative (which is never true). The correct way to handle this is
to use IS_ERR_VALUE (like is already done in k210_clk_set_rate). While
we're at it, we can move the error checking up into the caller of the pll
set/get rate functions. This also protects our other calculations from
using bogus values for rate.
Fixes: 609bd60b94 ("clk: k210: Rewrite to remove CCF")
Reported-by: Coverity Scan <scan-admin@coverity.com>
Signed-off-by: Sean Anderson <seanga2@gmail.com>
Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>
Diffstat (limited to 'drivers/clk')
| -rw-r--r-- | drivers/clk/clk_kendryte.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/clk/clk_kendryte.c b/drivers/clk/clk_kendryte.c index 3148756968..2caa21aec9 100644 --- a/drivers/clk/clk_kendryte.c +++ b/drivers/clk/clk_kendryte.c @@ -849,9 +849,6 @@ static ulong k210_pll_set_rate(struct k210_clk_priv *priv, int id, ulong rate, u32 reg; ulong calc_rate; - if (rate_in < 0) - return rate_in; - err = k210_pll_calc_config(rate, rate_in, &config); if (err) return err; @@ -895,7 +892,7 @@ static ulong k210_pll_get_rate(struct k210_clk_priv *priv, int id, u64 r, f, od; u32 reg = readl(priv->base + k210_plls[id].off); - if (rate_in < 0 || (reg & K210_PLL_BYPASS)) + if (reg & K210_PLL_BYPASS) return rate_in; if (!(reg & K210_PLL_PWRD)) @@ -1029,6 +1026,8 @@ static ulong do_k210_clk_get_rate(struct k210_clk_priv *priv, int id) parent = k210_clk_get_parent(priv, id); parent_rate = do_k210_clk_get_rate(priv, parent); + if (IS_ERR_VALUE(parent_rate)) + return parent_rate; if (k210_clks[id].flags & K210_CLKF_PLL) return k210_pll_get_rate(priv, k210_clks[id].pll, parent_rate); @@ -1099,6 +1098,8 @@ static ulong k210_clk_set_rate(struct clk *clk, unsigned long rate) parent = k210_clk_get_parent(priv, clk->id); rate_in = do_k210_clk_get_rate(priv, parent); + if (IS_ERR_VALUE(rate_in)) + return rate_in; log_debug("id=%ld rate=%lu rate_in=%lu\n", clk->id, rate, rate_in); |