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    Subject[PATCH 5.2 140/144] iwlwifi: dont unmap as page memory that was mapped as single
    Date
    From: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

    commit 87e7e25aee6b59fef740856f4e86d4b60496c9e1 upstream.

    In order to remember how to unmap a memory (as single or
    as page), we maintain a bit per Transmit Buffer (TBs) in
    the meta data (structure iwl_cmd_meta).
    We maintain a bitmap: 1 bit per TB.
    If the TB is set, we will free the memory as a page.
    This bitmap was never cleared. Fix this.

    Cc: stable@vger.kernel.org
    Fixes: 3cd1980b0cdf ("iwlwifi: pcie: introduce new tfd and tb formats")
    Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
    Signed-off-by: Johannes Berg <johannes.berg@intel.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    drivers/net/wireless/intel/iwlwifi/pcie/tx.c | 2 ++
    1 file changed, 2 insertions(+)

    --- a/drivers/net/wireless/intel/iwlwifi/pcie/tx.c
    +++ b/drivers/net/wireless/intel/iwlwifi/pcie/tx.c
    @@ -435,6 +435,8 @@ static void iwl_pcie_tfd_unmap(struct iw
    DMA_TO_DEVICE);
    }

    + meta->tbs = 0;
    +
    if (trans->cfg->use_tfh) {
    struct iwl_tfh_tfd *tfd_fh = (void *)tfd;


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