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

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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>
This commit is contained in:
Emmanuel Grumbach 2019-07-21 14:02:27 +03:00 committed by Greg Kroah-Hartman
parent c12ea355ef
commit 5557083f85
1 changed files with 2 additions and 0 deletions
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2
drivers/net/wireless/intel/iwlwifi/pcie/tx.c
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@ -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;