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drm/imx/dcss: fix resource size calculation

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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: 90393c9b54 ("drm/imx/dcss: request memory region")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Laurentiu Palcu <laurentiu.palcu@oss.nxp.com>
Signed-off-by: Laurentiu Palcu <laurentiu.palcu@oss.nxp.com>
Link: https://patchwork.freedesktop.org/patch/msgid/4914592b-4256-4c9c-bc1d-6dec1e473831@moroto.mountain
This commit is contained in:
Dan Carpenter 2024-02-13 21:05:01 +03:00 committed by Laurentiu Palcu
parent 9fa2679b7f
commit 9cb3542aee
1 changed files with 1 additions and 3 deletions
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4
drivers/gpu/drm/imx/dcss/dcss-dev.c
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@ -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);
}