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clk: sunxi-ng: common: Don't call hw_to_ccu_common on hw without common

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commit ea977d742507e534d9fe4f4d74256f6b7f589338 upstream.

In order to set the rate range of a hw sunxi_ccu_probe calls
hw_to_ccu_common() assuming all entries in desc->ccu_clks are contained
in a ccu_common struct. This assumption is incorrect and, in
consequence, causes invalid pointer de-references.

Remove the faulty call. Instead, add one more loop that iterates over
the ccu_clks and sets the rate range, if required.

Fixes: b914ec33b391 ("clk: sunxi-ng: common: Support minimum and maximum rate")
Reported-by: Robert J. Pafford <pafford.9@buckeyemail.osu.edu>
Closes: https://lore.kernel.org/lkml/DM6PR01MB58047C810DDD5D0AE397CADFF7C22@DM6PR01MB5804.prod.exchangelabs.com/
Cc: stable@vger.kernel.org
Signed-off-by: Frank Oltmanns <frank@oltmanns.dev>
Tested-by: Robert J. Pafford <pafford.9@buckeyemail.osu.edu>
Link: https://lore.kernel.org/r/20240623-sunxi-ng_fix_common_probe-v1-1-7c97e32824a1@oltmanns.dev
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Frank Oltmanns 2024-06-23 10:45:58 +02:00 committed by Greg Kroah-Hartman
parent ba02424852
commit 14c78d69db
1 changed files with 12 additions and 6 deletions
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18
drivers/clk/sunxi-ng/ccu_common.c
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@ -132,7 +132,6 @@ static int sunxi_ccu_probe(struct sunxi_ccu *ccu, struct device *dev,
for (i = 0; i < desc->hw_clks->num ; i++) {
struct clk_hw *hw = desc->hw_clks->hws[i];
struct ccu_common *common = hw_to_ccu_common(hw);
const char *name;
if (!hw)
@ -147,14 +146,21 @@ static int sunxi_ccu_probe(struct sunxi_ccu *ccu, struct device *dev,
pr_err("Couldn't register clock %d - %s\n", i, name);
goto err_clk_unreg;
}
}
if (common->max_rate)
clk_hw_set_rate_range(hw, common->min_rate,
common->max_rate);
for (i = 0; i < desc->num_ccu_clks; i++) {
struct ccu_common *cclk = desc->ccu_clks[i];
if (!cclk)
continue;
if (cclk->max_rate)
clk_hw_set_rate_range(&cclk->hw, cclk->min_rate,
cclk->max_rate);
else
WARN(common->min_rate,
WARN(cclk->min_rate,
"No max_rate, ignoring min_rate of clock %d - %s\n",
i, name);
i, clk_hw_get_name(&cclk->hw));
}
ret = of_clk_add_hw_provider(node, of_clk_hw_onecell_get,