[PATCH] drm/imx/dcss: fix resource size calculation
From: Dan Carpenter <hidden>
Date: 2024-02-13 18:05:09
Also in:
dri-devel, kernel-janitors, lkml
Subsystem:
drm drivers, drm drivers and misc gpu patches, nxp i.mx 8mq dcss driver, the rest · Maintainers:
David Airlie, Simona Vetter, Maarten Lankhorst, Maxime Ripard, Thomas Zimmermann, Laurentiu Palcu, Linus Torvalds
The resource is inclusive of the ->start and ->end addresses so this
calculation is not correct. It should be "res->end - res->start + 1".
Use the resource_size() to do the calculation.
Fixes: 90393c9b5408 ("drm/imx/dcss: request memory region")
Signed-off-by: Dan Carpenter <redacted>
---
From static analysis. Not tested.
drivers/gpu/drm/imx/dcss/dcss-dev.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/imx/dcss/dcss-dev.c b/drivers/gpu/drm/imx/dcss/dcss-dev.c
index 597e9b7bd4bf..7fd0c4c14205 100644
--- a/drivers/gpu/drm/imx/dcss/dcss-dev.c
+++ b/drivers/gpu/drm/imx/dcss/dcss-dev.c@@ -167,7 +167,6 @@ struct dcss_dev *dcss_dev_create(struct device *dev, bool hdmi_output) struct resource *res; struct dcss_dev *dcss; const struct dcss_type_data *devtype; - resource_size_t res_len; devtype = of_device_get_match_data(dev); if (!devtype) {
@@ -181,8 +180,7 @@ struct dcss_dev *dcss_dev_create(struct device *dev, bool hdmi_output) return ERR_PTR(-EINVAL); } - res_len = res->end - res->start; - if (!devm_request_mem_region(dev, res->start, res_len, "dcss")) { + if (!devm_request_mem_region(dev, res->start, resource_size(res), "dcss")) { dev_err(dev, "cannot request memory region\n"); return ERR_PTR(-EBUSY); }
--
2.43.0
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