| Message ID | 20230714014820.2186203-2-cuigaosheng1@huawei.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | Fix IS_ERR() vs NULL check for drm | expand |
Hi Gaosheng, On Fri, Jul 14, 2023 at 09:48:18AM +0800, Gaosheng Cui wrote: > The mipi_dsi_device_register_full() returns an ERR_PTR() on failure, > we should use IS_ERR() to check the return value. Correct - so the code is indeed wrong. Can you update it so we print the error code as this can be very helpful. And then please use dev_probe_err() too. Sam > > Fixes: 623a3531e9cf ("drm/panel: Add driver for Novatek NT35950 DSI DriverIC panels") > Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com> > --- > drivers/gpu/drm/panel/panel-novatek-nt35950.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/panel/panel-novatek-nt35950.c b/drivers/gpu/drm/panel/panel-novatek-nt35950.c > index 8b108ac80b55..4903bbf1df55 100644 > --- a/drivers/gpu/drm/panel/panel-novatek-nt35950.c > +++ b/drivers/gpu/drm/panel/panel-novatek-nt35950.c > @@ -571,7 +571,7 @@ static int nt35950_probe(struct mipi_dsi_device *dsi) > } > > nt->dsi[1] = mipi_dsi_device_register_full(dsi_r_host, info); > - if (!nt->dsi[1]) { > + if (IS_ERR(nt->dsi[1])) { > dev_err(dev, "Cannot get secondary DSI node\n"); > return -ENODEV; > } > -- > 2.25.1
diff --git a/drivers/gpu/drm/panel/panel-novatek-nt35950.c b/drivers/gpu/drm/panel/panel-novatek-nt35950.c index 8b108ac80b55..4903bbf1df55 100644 --- a/drivers/gpu/drm/panel/panel-novatek-nt35950.c +++ b/drivers/gpu/drm/panel/panel-novatek-nt35950.c @@ -571,7 +571,7 @@ static int nt35950_probe(struct mipi_dsi_device *dsi) } nt->dsi[1] = mipi_dsi_device_register_full(dsi_r_host, info); - if (!nt->dsi[1]) { + if (IS_ERR(nt->dsi[1])) { dev_err(dev, "Cannot get secondary DSI node\n"); return -ENODEV; }
The mipi_dsi_device_register_full() returns an ERR_PTR() on failure, we should use IS_ERR() to check the return value. Fixes: 623a3531e9cf ("drm/panel: Add driver for Novatek NT35950 DSI DriverIC panels") Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com> --- drivers/gpu/drm/panel/panel-novatek-nt35950.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)