| Message ID | 20210401091502.15825-1-srinivas.kandagatla@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | soundwire: qcom: handle return correctly in qcom_swrm_transport_params | expand |
On Thu, Apr 01, 2021 at 10:15:02AM +0100, Srinivas Kandagatla wrote: > Looks like return from reg_write is set but not checked. > Fix this by adding error return path. > > Reported-by: coverity-bot <keescook+coverity-bot@chromium.org> > Addresses-Coverity-ID: 1503591 ("UNUSED_VALUE") > Fixes: 128eaf937adb ("soundwire: qcom: add support to missing transport params") > Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Thanks for fixing this! Reviewed-by: Kees Cook <keescook@chromium.org> -Kees > --- > drivers/soundwire/qcom.c | 10 ++++++++++ > 1 file changed, 10 insertions(+) > > diff --git a/drivers/soundwire/qcom.c b/drivers/soundwire/qcom.c > index 5fd4a99cc8ac..348d9a46f850 100644 > --- a/drivers/soundwire/qcom.c > +++ b/drivers/soundwire/qcom.c > @@ -731,17 +731,23 @@ static int qcom_swrm_transport_params(struct sdw_bus *bus, > value |= pcfg->si; > > ret = ctrl->reg_write(ctrl, reg, value); > + if (ret) > + goto err; > > if (pcfg->lane_control != SWR_INVALID_PARAM) { > reg = SWRM_DP_PORT_CTRL_2_BANK(params->port_num, bank); > value = pcfg->lane_control; > ret = ctrl->reg_write(ctrl, reg, value); > + if (ret) > + goto err; > } > > if (pcfg->blk_group_count != SWR_INVALID_PARAM) { > reg = SWRM_DP_BLOCK_CTRL2_BANK(params->port_num, bank); > value = pcfg->blk_group_count; > ret = ctrl->reg_write(ctrl, reg, value); > + if (ret) > + goto err; > } > > if (pcfg->hstart != SWR_INVALID_PARAM > @@ -755,11 +761,15 @@ static int qcom_swrm_transport_params(struct sdw_bus *bus, > ret = ctrl->reg_write(ctrl, reg, value); > } > > + if (ret) > + goto err; > + > if (pcfg->bp_mode != SWR_INVALID_PARAM) { > reg = SWRM_DP_BLOCK_CTRL3_BANK(params->port_num, bank); > ret = ctrl->reg_write(ctrl, reg, pcfg->bp_mode); > } > > +err: > return ret; > } > > -- > 2.21.0 >
On 01-04-21, 10:15, Srinivas Kandagatla wrote: > Looks like return from reg_write is set but not checked. > Fix this by adding error return path. Applied, thanks
diff --git a/drivers/soundwire/qcom.c b/drivers/soundwire/qcom.c index 5fd4a99cc8ac..348d9a46f850 100644 --- a/drivers/soundwire/qcom.c +++ b/drivers/soundwire/qcom.c @@ -731,17 +731,23 @@ static int qcom_swrm_transport_params(struct sdw_bus *bus, value |= pcfg->si; ret = ctrl->reg_write(ctrl, reg, value); + if (ret) + goto err; if (pcfg->lane_control != SWR_INVALID_PARAM) { reg = SWRM_DP_PORT_CTRL_2_BANK(params->port_num, bank); value = pcfg->lane_control; ret = ctrl->reg_write(ctrl, reg, value); + if (ret) + goto err; } if (pcfg->blk_group_count != SWR_INVALID_PARAM) { reg = SWRM_DP_BLOCK_CTRL2_BANK(params->port_num, bank); value = pcfg->blk_group_count; ret = ctrl->reg_write(ctrl, reg, value); + if (ret) + goto err; } if (pcfg->hstart != SWR_INVALID_PARAM @@ -755,11 +761,15 @@ static int qcom_swrm_transport_params(struct sdw_bus *bus, ret = ctrl->reg_write(ctrl, reg, value); } + if (ret) + goto err; + if (pcfg->bp_mode != SWR_INVALID_PARAM) { reg = SWRM_DP_BLOCK_CTRL3_BANK(params->port_num, bank); ret = ctrl->reg_write(ctrl, reg, pcfg->bp_mode); } +err: return ret; }
Looks like return from reg_write is set but not checked. Fix this by adding error return path. Reported-by: coverity-bot <keescook+coverity-bot@chromium.org> Addresses-Coverity-ID: 1503591 ("UNUSED_VALUE") Fixes: 128eaf937adb ("soundwire: qcom: add support to missing transport params") Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> --- drivers/soundwire/qcom.c | 10 ++++++++++ 1 file changed, 10 insertions(+)