iwlwifi: pcie: simplify iwl_pci_find_dev_info()

We currently match the list of devices from the start to
the end, but then find the *last* match, so we need to
look at each and every entry. We don't want to change the
semantics ("most generic entry must come first"), so just
change the order of matching to be back-to-front, then we
can break out once we find a match.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20211024165252.abd85e1391cb.I7681fe90735044cc1c59f120e8591b7ac125535d@changeid
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/drv.c b/drivers/net/wireless/intel/iwlwifi/pcie/drv.c
index 3276f04..c574f04 100644 (file)
--- a/drivers/net/wireless/intel/iwlwifi/pcie/drv.c
+++ b/drivers/net/wireless/intel/iwlwifi/pcie/drv.c
@@ -1339,10 +1339,9 @@ iwl_pci_find_dev_info(u16 device, u16 subsystem_device,
                      u16 mac_type, u8 mac_step,
                      u16 rf_type, u8 cdb, u8 rf_id, u8 no_160, u8 cores)
 {
-       const struct iwl_dev_info *ret = NULL;
        int i;
 
-       for (i = 0; i < ARRAY_SIZE(iwl_dev_info_table); i++) {
+       for (i = ARRAY_SIZE(iwl_dev_info_table) - 1; i >= 0; i--) {
                const struct iwl_dev_info *dev_info = &iwl_dev_info_table[i];
 
                if (dev_info->device != (u16)IWL_CFG_ANY &&
@@ -1381,10 +1380,10 @@ iwl_pci_find_dev_info(u16 device, u16 subsystem_device,
                    dev_info->cores != cores)
                        continue;
 
-               ret = dev_info;
+               return dev_info;
        }
 
-       return ret;
+       return NULL;
 }
 
 static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)