Commit 7626b510 authored Jul 21, 2019 by Emmanuel Grumbach Committed by Greg Kroah-Hartman Aug 16, 2019

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: 3cd1980b ("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>

parent b38c56b7

drivers/net/wireless/intel/iwlwifi/pcie/tx.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -403,6 +403,8 @@ 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;