b43: refuse to load unsupported firmware

[This patch is supposed to be applied in 3.1 (and maybe older) branches only.]

New kernels support newer firmware that users may try to incorrectly use
with older kernels. Display error and explain the problem in such a case

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/net/wireless/b43/main.c b/drivers/net/wireless/b43/main.c
index b1fe4fe322a..7c2e09a1cc0 100644
--- a/drivers/net/wireless/b43/main.c
+++ b/drivers/net/wireless/b43/main.c
@@ -2401,6 +2401,13 @@ static int b43_upload_microcode(struct b43_wldev *dev)
                 b43_print_fw_helptext(dev->wl, 1);
                 err = -EOPNOTSUPP;
                 goto error;
+        } else if (fwrev >= 598) {
+                b43err(dev->wl, "YOUR FIRMWARE IS TOO NEW. Support for "
+                       "firmware 598 and up requires kernel 3.2 or newer. You "
+                       "have to install older firmware or upgrade kernel.\n");
+                b43_print_fw_helptext(dev->wl, 1);
+                err = -EOPNOTSUPP;
+                goto error;
         }
         dev->fw.rev = fwrev;
         dev->fw.patch = fwpatch;