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cxl/pci: simplify the check of mem_enabled in cxl_hdm_decode_init()

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Cases can be divided into two categories which are DVSEC range enabled and
not enabled when HDM decoders exist but is not enabled. To avoid checking
info->mem_enabled, which indicates the enablement of DVSEC range, every
time, we can check !info->mem_enabled once in advance. This simplification
can make the code clearer.

No functional change intended.

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Yanfei Xu <yanfei.xu@intel.com>
Reviewed-by: Alison Schofield <alison.schofield@intel.com>
Link: https://patch.msgid.link/20240828084231.1378789-5-yanfei.xu@intel.com
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
This commit is contained in:
Yanfei Xu 2024-08-28 16:42:31 +08:00 committed by Dave Jiang
parent 99bf0eebc7
commit 3f9e075317
1 changed files with 11 additions and 10 deletions
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21
drivers/cxl/core/pci.c
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@ -426,7 +426,15 @@ int cxl_hdm_decode_init(struct cxl_dev_state *cxlds, struct cxl_hdm *cxlhdm,
return -ENODEV;
}
for (i = 0, allowed = 0; info->mem_enabled && i < info->ranges; i++) {
if (!info->mem_enabled) {
rc = devm_cxl_enable_hdm(&port->dev, cxlhdm);
if (rc)
return rc;
return devm_cxl_enable_mem(&port->dev, cxlds);
}
for (i = 0, allowed = 0; i < info->ranges; i++) {
struct device *cxld_dev;
cxld_dev = device_find_child(&root->dev, &info->dvsec_range[i],
@ -440,7 +448,7 @@ int cxl_hdm_decode_init(struct cxl_dev_state *cxlds, struct cxl_hdm *cxlhdm,
allowed++;
}
if (!allowed && info->mem_enabled) {
if (!allowed) {
dev_err(dev, "Range register decodes outside platform defined CXL ranges.\n");
return -ENXIO;
}
@ -454,14 +462,7 @@ int cxl_hdm_decode_init(struct cxl_dev_state *cxlds, struct cxl_hdm *cxlhdm,
* match. If at least one DVSEC range is enabled and allowed, skip HDM
* Decoder Capability Enable.
*/
if (info->mem_enabled)
return 0;
rc = devm_cxl_enable_hdm(&port->dev, cxlhdm);
if (rc)
return rc;
return devm_cxl_enable_mem(&port->dev, cxlds);
return 0;
}
EXPORT_SYMBOL_NS_GPL(cxl_hdm_decode_init, CXL);