PCI/AER: Use guard() in cxl_rch_handle_error_iter()

cxl_rch_handle_error_iter() includes a call to device_lock() using a goto
for multiple return paths. Improve readability and maintainability by
using the guard() lock variant.

Signed-off-by: Terry Bowman <terry.bowman@amd.com>
Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://patch.msgid.link/20260114182055.46029-13-terry.bowman@amd.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>

diff --git a/drivers/pci/pcie/aer_cxl_rch.c b/drivers/pci/pcie/aer_cxl_rch.c
index 6b515edb12c15a73976e9f103cd6efac357ab682..e471eefec9c40610d04d006e8d04e9a873ae7510 100644 (file)
--- a/drivers/pci/pcie/aer_cxl_rch.c
+++ b/drivers/pci/pcie/aer_cxl_rch.c
@@ -42,11 +42,11 @@ static int cxl_rch_handle_error_iter(struct pci_dev *dev, void *data)
        if (!is_cxl_mem_dev(dev) || !cxl_error_is_native(dev))
                return 0;
 
-       device_lock(&dev->dev);
+       guard(device)(&dev->dev);
 
        err_handler = dev->driver ? dev->driver->err_handler : NULL;
        if (!err_handler)
-               goto out;
+               return 0;
 
        if (info->severity == AER_CORRECTABLE) {
                if (err_handler->cor_error_detected)
@@ -57,8 +57,6 @@ static int cxl_rch_handle_error_iter(struct pci_dev *dev, void *data)
                else if (info->severity == AER_FATAL)
                        err_handler->error_detected(dev, pci_channel_io_frozen);
        }
-out:
-       device_unlock(&dev->dev);
        return 0;
 }