package/kernel/mac80211/patches/307-v4.15-brcmfmac-fix-CLM-load-error-for-legacy-chips-when-us.patch

   1 From cc124d5cc8d81985c3511892d7a6d546552ff754 Mon Sep 17 00:00:00 2001
   2 From: Wright Feng <wright.feng@cypress.com>
   3 Date: Tue, 16 Jan 2018 17:26:50 +0800
   4 Subject: [PATCH] brcmfmac: fix CLM load error for legacy chips when user
   5  helper is enabled
   6
   7 For legacy chips without CLM blob files, kernel with user helper function
   8 returns -EAGAIN when we request_firmware(), and then driver got failed
   9 when bringing up legacy chips. We expect the CLM blob file for legacy chip
  10 is not existence in firmware path, but the -ENOENT error is transferred to
  11 -EAGAIN in firmware_class.c with user helper.
  12 Because of that, we continue with CLM data currently present in firmware
  13 if getting error from doing request_firmware().
  14
  15 Cc: stable@vger.kernel.org # v4.15.y
  16 Reviewed-by: Arend van Spriel <arend.vanspriel@broadcom.com>
  17 Signed-off-by: Wright Feng <wright.feng@cypress.com>
  18 Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
  19 ---
  20  drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c | 9 +++------
  21  1 file changed, 3 insertions(+), 6 deletions(-)
  22
  23 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c
  24 +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c
  25 @@ -182,12 +182,9 @@ static int brcmf_c_process_clm_blob(stru
  26
  27         err = request_firmware(&clm, clm_name, dev);
  28         if (err) {
  29 -               if (err == -ENOENT) {
  30 -                       brcmf_dbg(INFO, "continue with CLM data currently present in firmware\n");
  31 -                       return 0;
  32 -               }
  33 -               brcmf_err("request CLM blob file failed (%d)\n", err);
  34 -               return err;
  35 +               brcmf_info("no clm_blob available(err=%d), device may have limited channels available\n",
  36 +                          err);
  37 +               return 0;
  38         }
  39
  40         chunk_buf = kzalloc(sizeof(*chunk_buf) + MAX_CHUNK_LEN - 1, GFP_KERNEL);