cxl_pci_map_regblock() may return an ERR_PTR(), but cxl_pci_setup_regs()
is only prepared for NULL as the error case. Pick the minimal fix for
-stable backport purposes and just have cxl_pci_map_regblock() return
NULL for errors.
Fixes: f8a7e8c29be8 ("cxl/pci: Reserve all device regions at once")
Cc: <stable@xxxxxxxxxxxxxxx>
Reviewed-by: Ira Weiny <ira.weiny@xxxxxxxxx>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx>
---
Changes since v3:
- clarify in the changelog why cxl_pci_map_regblock() was changed to
return NULL rather than fix the caller to expect an ERR_PTR().
(Jonathan)
drivers/cxl/pci.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/cxl/pci.c b/drivers/cxl/pci.c
index ccc7c2573ddc..9c178002d49e 100644
--- a/drivers/cxl/pci.c
+++ b/drivers/cxl/pci.c
@@ -317,7 +317,7 @@ static void __iomem *cxl_pci_map_regblock(struct cxl_mem *cxlm,
if (pci_resource_len(pdev, bar) < offset) {
dev_err(dev, "BAR%d: %pr: too small (offset: %#llx)\n", bar,
&pdev->resource[bar], (unsigned long long)offset);
- return IOMEM_ERR_PTR(-ENXIO);
+ return NULL;
}
addr = pci_iomap(pdev, bar, 0);
