iwlwifi: don't unmap as page memory that was mapped as single

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>

diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/tx.c b/drivers/net/wireless/intel/iwlwifi/pcie/tx.c
index 4704137a26e0ac781b2c759c97259b0f1427095f..c3a2e6b6da65b5344ca3f3fd89247926a3336eff 100644 (file)
--- a/drivers/net/wireless/intel/iwlwifi/pcie/tx.c
+++ b/drivers/net/wireless/intel/iwlwifi/pcie/tx.c
@@ -401,6 +401,8 @@ static void iwl_pcie_tfd_unmap(struct iwl_trans *trans,
                                         DMA_TO_DEVICE);
        }
 
+       meta->tbs = 0;
+
        if (trans->cfg->use_tfh) {
                struct iwl_tfh_tfd *tfd_fh = (void *)tfd;