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@xxxxxxxxxxxxxxxxxxxxx>
---
drivers/firmware/cirrus/cs_dsp.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/firmware/cirrus/cs_dsp.c b/drivers/firmware/cirrus/cs_dsp.c
index 62ba4ebbf11f5..9eecd16265375 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);
--
2.11.0
