ath9k_hw: ignore eeprom magic mismatch on flash based devices

Many AR913x based devices (maybe others too) do not have a valid EEPROM
magic in their calibration data partition.

Fixes: 6fa658fd5ab2 ("ath9k: Simplify and fix eeprom endianness swapping")
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Acked-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

diff --git a/drivers/net/wireless/ath/ath9k/eeprom.c b/drivers/net/wireless/ath/ath9k/eeprom.c
index a7afdee..73fb423 100644 (file)
--- a/drivers/net/wireless/ath/ath9k/eeprom.c
+++ b/drivers/net/wireless/ath/ath9k/eeprom.c
@@ -150,18 +150,18 @@ int ath9k_hw_nvram_swap_data(struct ath_hw *ah, bool *swap_needed, int size)
                return -EIO;
        }
 
-       if (magic == AR5416_EEPROM_MAGIC) {
-               *swap_needed = false;
-       } else if (swab16(magic) == AR5416_EEPROM_MAGIC) {
+       *swap_needed = false;
+       if (swab16(magic) == AR5416_EEPROM_MAGIC) {
                if (ah->ah_flags & AH_NO_EEP_SWAP) {
                        ath_info(common,
                                 "Ignoring endianness difference in EEPROM magic bytes.\n");
-
-                       *swap_needed = false;
                } else {
                        *swap_needed = true;
                }
-       } else {
+       } else if (magic != AR5416_EEPROM_MAGIC) {
+               if (ath9k_hw_use_flash(ah))
+                       return 0;
+
                ath_err(common,
                        "Invalid EEPROM Magic (0x%04x).\n", magic);
                return -EINVAL;