ath9k: Handle unsupported MAC versions early

There is no point in trying to bring up the chip when
the MAC version is not present in the supported list.

Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index 2ba712471d8530fdc92eceacecfdf91878521d6a..d0470a87453918b4f980bf5fd9c798774af88b2f 100644 (file)
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -474,6 +474,30 @@ static int __ath9k_hw_init(struct ath_hw *ah)
 
        ath9k_hw_read_revisions(ah);
 
+       switch (ah->hw_version.macVersion) {
+       case AR_SREV_VERSION_5416_PCI:
+       case AR_SREV_VERSION_5416_PCIE:
+       case AR_SREV_VERSION_9160:
+       case AR_SREV_VERSION_9100:
+       case AR_SREV_VERSION_9280:
+       case AR_SREV_VERSION_9285:
+       case AR_SREV_VERSION_9287:
+       case AR_SREV_VERSION_9271:
+       case AR_SREV_VERSION_9300:
+       case AR_SREV_VERSION_9330:
+       case AR_SREV_VERSION_9485:
+       case AR_SREV_VERSION_9340:
+       case AR_SREV_VERSION_9462:
+       case AR_SREV_VERSION_9550:
+       case AR_SREV_VERSION_9565:
+               break;
+       default:
+               ath_err(common,
+                       "Mac Chip Rev 0x%02x.%x is not supported by this driver\n",
+                       ah->hw_version.macVersion, ah->hw_version.macRev);
+               return -EOPNOTSUPP;
+       }
+
        /*
         * Read back AR_WA into a permanent copy and set bits 14 and 17.
         * We need to do this to avoid RMW of this register. We cannot
@@ -527,30 +551,6 @@ static int __ath9k_hw_init(struct ath_hw *ah)
        else
                ah->config.max_txtrig_level = MAX_TX_FIFO_THRESHOLD;
 
-       switch (ah->hw_version.macVersion) {
-       case AR_SREV_VERSION_5416_PCI:
-       case AR_SREV_VERSION_5416_PCIE:
-       case AR_SREV_VERSION_9160:
-       case AR_SREV_VERSION_9100:
-       case AR_SREV_VERSION_9280:
-       case AR_SREV_VERSION_9285:
-       case AR_SREV_VERSION_9287:
-       case AR_SREV_VERSION_9271:
-       case AR_SREV_VERSION_9300:
-       case AR_SREV_VERSION_9330:
-       case AR_SREV_VERSION_9485:
-       case AR_SREV_VERSION_9340:
-       case AR_SREV_VERSION_9462:
-       case AR_SREV_VERSION_9550:
-       case AR_SREV_VERSION_9565:
-               break;
-       default:
-               ath_err(common,
-                       "Mac Chip Rev 0x%02x.%x is not supported by this driver\n",
-                       ah->hw_version.macVersion, ah->hw_version.macRev);
-               return -EOPNOTSUPP;
-       }
-
        if (AR_SREV_9271(ah) || AR_SREV_9100(ah) || AR_SREV_9340(ah) ||
            AR_SREV_9330(ah) || AR_SREV_9550(ah))
                ah->is_pciexpress = false;