be2net: fix BE3-R FW download compatibility check

In the BE3 FW image, unlike Skyhawk's, the "asic_type_rev" field doesn't
track the asic_rev of chip it is compatible with. When asic_type_rev
is 0 the image is compatible only with pre-BE3-R chips (asic_rev < 0x10).
Fix the current compatibility check to take care of this.
We hit this issue when we try to flash old BE3 images (used prior to the
release of BE3-R) on pre-BE3-R adapters.

Fixes: a6e6ff6eee12f3e ("be2net: simplify UFI compatibility checking")
Signed-off-by: Kalesh AP <kalesh.purayil@avagotech.com>
Signed-off-by: Sathya Perla <sathya.perla@avagotech.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 9 insertions, 1 deletions

diff --git a/drivers/net/ethernet/emulex/benet/be_main.c b/drivers/net/ethernet/emulex/benet/be_main.c
index 7bf51a1a0a77..86eed4761806 100644
--- a/drivers/net/ethernet/emulex/benet/be_main.c
+++ b/drivers/net/ethernet/emulex/benet/be_main.c
@@ -4999,7 +4999,15 @@ static bool be_check_ufi_compatibility(struct be_adapter *adapter,
                 return false;
         }
 
-        return (fhdr->asic_type_rev >= adapter->asic_rev);
+        /* In BE3 FW images the "asic_type_rev" field doesn't track the
+         * asic_rev of the chips it is compatible with.
+         * When asic_type_rev is 0 the image is compatible only with
+         * pre-BE3-R chips (asic_rev < 0x10)
+         */
+        if (BEx_chip(adapter) && fhdr->asic_type_rev == 0)
+                return adapter->asic_rev < 0x10;
+        else
+                return (fhdr->asic_type_rev >= adapter->asic_rev);
 }
 
 static int be_fw_download(struct be_adapter *adapter, const struct firmware* fw)