diff options
| author |   Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com> | 2019-06-17 13:36:41 +0200 |
|---|---|---|
| committer |   Mark Brown <broonie@kernel.org> | 2019-06-25 15:33:21 +0100 |
| commit | 6ee927f2f014668c5fe920d0fd1a6ad48671bfce (patch) | |
| tree | ee1916a45d0c4019e96ff0727711344ac627307b /sound/soc/intel | |
| parent | ASoC: Intel: Skylake: Properly cleanup on component removal (diff) | |
| download | linux-dev-6ee927f2f014668c5fe920d0fd1a6ad48671bfce.tar.xz linux-dev-6ee927f2f014668c5fe920d0fd1a6ad48671bfce.zip | |
ASoC: Intel: Skylake: Fix NULL ptr dereference when unloading clk dev
When driver is probed, we iterate over NHLT and check if clk entries are
present. For each such entry we call register_skl_clk and keep the
result in data->clk[].
Currently data->clk is sparsely indexed using NHLT table iterator, while
when freeing we use number of registered entries. Let's just use
data->avail_clk_cnt as index, so it can be reset back in
unregister_src_clk.
Signed-off-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/intel')
| -rw-r--r-- | sound/soc/intel/skylake/skl-ssp-clk.c | 16 |
1 files changed, 7 insertions, 9 deletions
diff --git a/sound/soc/intel/skylake/skl-ssp-clk.c b/sound/soc/intel/skylake/skl-ssp-clk.c index cda1b5fa7436..5bb6e40d4d3e 100644 --- a/sound/soc/intel/skylake/skl-ssp-clk.c +++ b/sound/soc/intel/skylake/skl-ssp-clk.c @@ -276,10 +276,8 @@ static void unregister_parent_src_clk(struct skl_clk_parent *pclk, static void unregister_src_clk(struct skl_clk_data *dclk) { - u8 cnt = dclk->avail_clk_cnt; - - while (cnt--) - clkdev_drop(dclk->clk[cnt]->lookup); + while (dclk->avail_clk_cnt--) + clkdev_drop(dclk->clk[dclk->avail_clk_cnt]->lookup); } static int skl_register_parent_clks(struct device *dev, @@ -381,13 +379,13 @@ static int skl_clk_dev_probe(struct platform_device *pdev) if (clks[i].rate_cfg[0].rate == 0) continue; - data->clk[i] = register_skl_clk(dev, &clks[i], clk_pdata, i); - if (IS_ERR(data->clk[i])) { - ret = PTR_ERR(data->clk[i]); + data->clk[data->avail_clk_cnt] = register_skl_clk(dev, + &clks[i], clk_pdata, i); + + if (IS_ERR(data->clk[data->avail_clk_cnt])) { + ret = PTR_ERR(data->clk[data->avail_clk_cnt++]); goto err_unreg_skl_clk; } - - data->avail_clk_cnt++; } platform_set_drvdata(pdev, data); |