| Message ID | 20231031222851.3126434-12-u.kleine-koenig@pengutronix.de (mailing list archive) |
|---|---|
| State | Handled Elsewhere, archived |
| Headers | show |
| Series | interconnect: Convert to platform remove callback returning void | expand |
On 31/10/2023 23:28, Uwe Kleine-König wrote: > The .remove() callback for a platform driver returns an int which makes > many driver authors wrongly assume it's possible to do error handling by > returning an error code. However the value returned is ignored (apart > from emitting a warning) and this typically results in resource leaks. > > To improve here there is a quest to make the remove callback return > void. In the first step of this quest all drivers are converted to > .remove_new(), which already returns void. Eventually after all drivers > are converted, .remove_new() will be renamed to .remove(). > > Several interconnect/qcom drivers use qnoc_remove() as remove callback. > Make this function return void (instead of unconditionally zero) and > adapt the drivers using this function accordingly. > > Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> > --- Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org> Konrad
diff --git a/drivers/interconnect/qcom/icc-rpm.c b/drivers/interconnect/qcom/icc-rpm.c index 628e651c555c..fb54e78f8fd7 100644 --- a/drivers/interconnect/qcom/icc-rpm.c +++ b/drivers/interconnect/qcom/icc-rpm.c @@ -627,14 +627,12 @@ int qnoc_probe(struct platform_device *pdev) } EXPORT_SYMBOL(qnoc_probe); -int qnoc_remove(struct platform_device *pdev) +void qnoc_remove(struct platform_device *pdev) { struct qcom_icc_provider *qp = platform_get_drvdata(pdev); icc_provider_deregister(&qp->provider); icc_nodes_remove(&qp->provider); clk_disable_unprepare(qp->bus_clk); - - return 0; } EXPORT_SYMBOL(qnoc_remove); diff --git a/drivers/interconnect/qcom/icc-rpm.h b/drivers/interconnect/qcom/icc-rpm.h index a13768cfd231..f4883d43eae4 100644 --- a/drivers/interconnect/qcom/icc-rpm.h +++ b/drivers/interconnect/qcom/icc-rpm.h @@ -161,7 +161,7 @@ extern const struct rpm_clk_resource aggre1_branch_clk; extern const struct rpm_clk_resource aggre2_branch_clk; int qnoc_probe(struct platform_device *pdev); -int qnoc_remove(struct platform_device *pdev); +void qnoc_remove(struct platform_device *pdev); bool qcom_icc_rpm_smd_available(void); int qcom_icc_rpm_smd_send(int ctx, int rsc_type, int id, u32 val); diff --git a/drivers/interconnect/qcom/msm8916.c b/drivers/interconnect/qcom/msm8916.c index 35148880b3e8..499b1a9ac413 100644 --- a/drivers/interconnect/qcom/msm8916.c +++ b/drivers/interconnect/qcom/msm8916.c @@ -1344,7 +1344,7 @@ MODULE_DEVICE_TABLE(of, msm8916_noc_of_match); static struct platform_driver msm8916_noc_driver = { .probe = qnoc_probe, - .remove = qnoc_remove, + .remove_new = qnoc_remove, .driver = { .name = "qnoc-msm8916", .of_match_table = msm8916_noc_of_match, diff --git a/drivers/interconnect/qcom/msm8939.c b/drivers/interconnect/qcom/msm8939.c index b52c5ac1175c..8ff2c23b1ca0 100644 --- a/drivers/interconnect/qcom/msm8939.c +++ b/drivers/interconnect/qcom/msm8939.c @@ -1421,7 +1421,7 @@ MODULE_DEVICE_TABLE(of, msm8939_noc_of_match); static struct platform_driver msm8939_noc_driver = { .probe = qnoc_probe, - .remove = qnoc_remove, + .remove_new = qnoc_remove, .driver = { .name = "qnoc-msm8939", .of_match_table = msm8939_noc_of_match, diff --git a/drivers/interconnect/qcom/msm8996.c b/drivers/interconnect/qcom/msm8996.c index b73566c9b21f..788131400cd1 100644 --- a/drivers/interconnect/qcom/msm8996.c +++ b/drivers/interconnect/qcom/msm8996.c @@ -2108,7 +2108,7 @@ MODULE_DEVICE_TABLE(of, qnoc_of_match); static struct platform_driver qnoc_driver = { .probe = qnoc_probe, - .remove = qnoc_remove, + .remove_new = qnoc_remove, .driver = { .name = "qnoc-msm8996", .of_match_table = qnoc_of_match, diff --git a/drivers/interconnect/qcom/qcm2290.c b/drivers/interconnect/qcom/qcm2290.c index b88cf9a022e0..96735800b13c 100644 --- a/drivers/interconnect/qcom/qcm2290.c +++ b/drivers/interconnect/qcom/qcm2290.c @@ -1367,7 +1367,7 @@ MODULE_DEVICE_TABLE(of, qcm2290_noc_of_match); static struct platform_driver qcm2290_noc_driver = { .probe = qnoc_probe, - .remove = qnoc_remove, + .remove_new = qnoc_remove, .driver = { .name = "qnoc-qcm2290", .of_match_table = qcm2290_noc_of_match, diff --git a/drivers/interconnect/qcom/qcs404.c b/drivers/interconnect/qcom/qcs404.c index 9fa1da70c843..11b49a89c03d 100644 --- a/drivers/interconnect/qcom/qcs404.c +++ b/drivers/interconnect/qcom/qcs404.c @@ -1083,7 +1083,7 @@ MODULE_DEVICE_TABLE(of, qcs404_noc_of_match); static struct platform_driver qcs404_noc_driver = { .probe = qnoc_probe, - .remove = qnoc_remove, + .remove_new = qnoc_remove, .driver = { .name = "qnoc-qcs404", .of_match_table = qcs404_noc_of_match, diff --git a/drivers/interconnect/qcom/sdm660.c b/drivers/interconnect/qcom/sdm660.c index 7392bebba334..ab91de446da8 100644 --- a/drivers/interconnect/qcom/sdm660.c +++ b/drivers/interconnect/qcom/sdm660.c @@ -1714,7 +1714,7 @@ MODULE_DEVICE_TABLE(of, sdm660_noc_of_match); static struct platform_driver sdm660_noc_driver = { .probe = qnoc_probe, - .remove = qnoc_remove, + .remove_new = qnoc_remove, .driver = { .name = "qnoc-sdm660", .of_match_table = sdm660_noc_of_match,
The .remove() callback for a platform driver returns an int which makes many driver authors wrongly assume it's possible to do error handling by returning an error code. However the value returned is ignored (apart from emitting a warning) and this typically results in resource leaks. To improve here there is a quest to make the remove callback return void. In the first step of this quest all drivers are converted to .remove_new(), which already returns void. Eventually after all drivers are converted, .remove_new() will be renamed to .remove(). Several interconnect/qcom drivers use qnoc_remove() as remove callback. Make this function return void (instead of unconditionally zero) and adapt the drivers using this function accordingly. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> --- drivers/interconnect/qcom/icc-rpm.c | 4 +--- drivers/interconnect/qcom/icc-rpm.h | 2 +- drivers/interconnect/qcom/msm8916.c | 2 +- drivers/interconnect/qcom/msm8939.c | 2 +- drivers/interconnect/qcom/msm8996.c | 2 +- drivers/interconnect/qcom/qcm2290.c | 2 +- drivers/interconnect/qcom/qcs404.c | 2 +- drivers/interconnect/qcom/sdm660.c | 2 +- 8 files changed, 8 insertions(+), 10 deletions(-)