2020-06-05 16:20:21

by Chuhong Yuan

Subject: [PATCH v2] media: budget-core: Improve exception handling in budget_register()

budget_register() has no error handling after its failure.
Add the missed undo functions for error handling to fix it.

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Chuhong Yuan <[email protected]>
---
Changes in v2:
- Modify the label of error handler.

drivers/media/pci/ttpci/budget-core.c | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/media/pci/ttpci/budget-core.c b/drivers/media/pci/ttpci/budget-core.c
index fadbdeeb4495..293867b9e796 100644
--- a/drivers/media/pci/ttpci/budget-core.c
+++ b/drivers/media/pci/ttpci/budget-core.c
@@ -369,20 +369,25 @@ static int budget_register(struct budget *budget)
ret = dvbdemux->dmx.add_frontend(&dvbdemux->dmx, &budget->hw_frontend);

if (ret < 0)
- return ret;
+ goto err_release_dmx;

budget->mem_frontend.source = DMX_MEMORY_FE;
ret = dvbdemux->dmx.add_frontend(&dvbdemux->dmx, &budget->mem_frontend);
if (ret < 0)
- return ret;
+ goto err_release_dmx;

ret = dvbdemux->dmx.connect_frontend(&dvbdemux->dmx, &budget->hw_frontend);
if (ret < 0)
- return ret;
+ goto err_release_dmx;

dvb_net_init(&budget->dvb_adapter, &budget->dvb_net, &dvbdemux->dmx);

return 0;
+
+err_release_dmx:
+ dvb_dmxdev_release(&budget->dmxdev);
+ dvb_dmx_release(&budget->demux);
+ return ret;
}

static void budget_unregister(struct budget *budget)
--
2.26.2

2020-06-14 20:36:39

by Sean Young

Subject: Re: [PATCH v2] media: budget-core: Improve exception handling in budget_register()

On Sat, Jun 06, 2020 at 12:17:28AM +0800, Chuhong Yuan wrote:
> budget_register() has no error handling after its failure.
> Add the missed undo functions for error handling to fix it.
>
> Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")

Changes look good, but the Fixes: points to the first import of linux
into git. I'm not sure this is useful information so I've removed it.

Applied, thanks.

> Signed-off-by: Chuhong Yuan <[email protected]>
> ---
> Changes in v2:
> - Modify the label of error handler.
>
> drivers/media/pci/ttpci/budget-core.c | 11 ++++++++---
> 1 file changed, 8 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/media/pci/ttpci/budget-core.c b/drivers/media/pci/ttpci/budget-core.c
> index fadbdeeb4495..293867b9e796 100644
> --- a/drivers/media/pci/ttpci/budget-core.c
> +++ b/drivers/media/pci/ttpci/budget-core.c
> @@ -369,20 +369,25 @@ static int budget_register(struct budget *budget)
> ret = dvbdemux->dmx.add_frontend(&dvbdemux->dmx, &budget->hw_frontend);
>
> if (ret < 0)
> - return ret;
> + goto err_release_dmx;
>
> budget->mem_frontend.source = DMX_MEMORY_FE;
> ret = dvbdemux->dmx.add_frontend(&dvbdemux->dmx, &budget->mem_frontend);
> if (ret < 0)
> - return ret;
> + goto err_release_dmx;
>
> ret = dvbdemux->dmx.connect_frontend(&dvbdemux->dmx, &budget->hw_frontend);
> if (ret < 0)
> - return ret;
> + goto err_release_dmx;
>
> dvb_net_init(&budget->dvb_adapter, &budget->dvb_net, &dvbdemux->dmx);
>
> return 0;
> +
> +err_release_dmx:
> + dvb_dmxdev_release(&budget->dmxdev);
> + dvb_dmx_release(&budget->demux);
> + return ret;
> }
>
> static void budget_unregister(struct budget *budget)
> --
> 2.26.2