https://bugzilla.kernel.org/show_bug.cgi?id=42903
Based on the work of <fynivx@gmail.com>
Signed-off-by: Panayiotis Karabassis <panayk@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: John W. Linville <linville@tuxdriver.com>
 
        if (NR_CPUS > 1 && ah->config.serialize_regmode == SER_REG_MODE_AUTO) {
                if (ah->hw_version.macVersion == AR_SREV_VERSION_5416_PCI ||
-                   ((AR_SREV_9160(ah) || AR_SREV_9280(ah)) &&
+                   ((AR_SREV_9160(ah) || AR_SREV_9280(ah) || AR_SREV_9287(ah)) &&
                     !ah->is_pciexpress)) {
                        ah->config.serialize_regmode =
                                SER_REG_MODE_ON;