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| author | Charles Keepax <ckeepax@opensource.cirrus.com> | 2021-11-17 13:22:57 +0000 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2021-11-17 22:16:25 +0000 |
| commit | 86c6080407740937ed2ba0ccd181e947f77e2154 (patch) | |
| tree | 380b99c75928041a83a5fea186838acf473dff9a /drivers/firmware | |
| parent | dcee767667f44ed0d40a3debf507a3ba027a1994 (diff) | |
| download | linux-stable-86c6080407740937ed2ba0ccd181e947f77e2154.tar.gz linux-stable-86c6080407740937ed2ba0ccd181e947f77e2154.tar.bz2 linux-stable-86c6080407740937ed2ba0ccd181e947f77e2154.zip | |
firmware: cs_dsp: Perform NULL check in cs_dsp_coeff_write/read_ctrl
Add a NULL check to the cs_dsp_coeff_write/read_ctrl functions. This is
a major convenience for users of the cs_dsp library as it allows the call
to cs_dsp_get_ctl to be inlined with the call to read/write the control
itself.
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20211117132300.1290-7-ckeepax@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/firmware')
| -rw-r--r-- | drivers/firmware/cirrus/cs_dsp.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/firmware/cirrus/cs_dsp.c b/drivers/firmware/cirrus/cs_dsp.c index 62ba4ebbf11f..9eecd1626537 100644 --- a/drivers/firmware/cirrus/cs_dsp.c +++ b/drivers/firmware/cirrus/cs_dsp.c @@ -758,6 +758,9 @@ int cs_dsp_coeff_write_ctrl(struct cs_dsp_coeff_ctl *ctl, const void *buf, size_ lockdep_assert_held(&ctl->dsp->pwr_lock); + if (!ctl) + return -ENOENT; + if (ctl->flags & WMFW_CTL_FLAG_VOLATILE) ret = -EPERM; else if (buf != ctl->cache) @@ -817,6 +820,9 @@ int cs_dsp_coeff_read_ctrl(struct cs_dsp_coeff_ctl *ctl, void *buf, size_t len) lockdep_assert_held(&ctl->dsp->pwr_lock); + if (!ctl) + return -ENOENT; + if (ctl->flags & WMFW_CTL_FLAG_VOLATILE) { if (ctl->enabled && ctl->dsp->running) return cs_dsp_coeff_read_ctrl_raw(ctl, buf, len); |