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authorDan Williams <dan.j.williams@intel.com>2022-03-15 04:22:33 +0300
committerDan Williams <dan.j.williams@intel.com>2022-04-13 05:11:58 +0300
commitfbaf2b079d2a0a9c7114fbd4d1c0f3dd7a3cb3ad (patch)
tree486c3fb2116b76fa06636da11dab3027d4049b09 /drivers/cxl
parente39f9be08d9dfe685c8a325ac1755c04f383effc (diff)
downloadlinux-fbaf2b079d2a0a9c7114fbd4d1c0f3dd7a3cb3ad.tar.xz
cxl/mem: Make cxl_dvsec_range() init failure fatal
In preparation for the cxl_pci driver to continue operation after cxl_dvsec_range() failure, update cxl_mem to check for negative error codes in info->ranges. Treat that condition as fatal regardless of the state of the HDM configuration since cxl_mem needs positive confirmation that legacy ranges were not established by platform firmware or another agent. Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com. Reviewed-by: Ben Widawsky <ben.widawsky@intel.com> Reviewed-by: Davidlohr Bueso <dave@stgolabs.net> Link: https://lore.kernel.org/r/164730735324.3806189.4167509857771192422.stgit@dwillia2-desk3.amr.corp.intel.com Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/cxl')
-rw-r--r--drivers/cxl/mem.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/cxl/mem.c b/drivers/cxl/mem.c
index cd4e8bba82aa..50704deb2ff0 100644
--- a/drivers/cxl/mem.c
+++ b/drivers/cxl/mem.c
@@ -88,6 +88,9 @@ __mock bool cxl_dvsec_decode_init(struct cxl_dev_state *cxlds)
void __iomem *crb;
u32 global_ctrl;
+ if (info->ranges < 0)
+ return false;
+
/* map hdm decoder */
crb = ioremap(cxlds->component_reg_phys, CXL_COMPONENT_REG_BLOCK_SIZE);
if (!crb) {