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iwlwifi: mvm: unmap the paging memory before freeing it

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This led to a DMA splat.

Fixes: a6c4fb4441 ("iwlwifi: mvm: Add FW paging mechanism for the UMAC on PCI")
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
This commit is contained in:
Emmanuel Grumbach 2016-06-19 20:57:02 +03:00 committed by Luca Coelho
parent 5e7d7eb9cc
commit 3edbc7daba
1 changed files with 8 additions and 4 deletions
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12
drivers/net/wireless/intel/iwlwifi/mvm/fw.c
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@ -160,17 +160,21 @@ void iwl_free_fw_paging(struct iwl_mvm *mvm)
return;
for (i = 0; i < NUM_OF_FW_PAGING_BLOCKS; i++) {
if (!mvm->fw_paging_db[i].fw_paging_block) {
struct iwl_fw_paging *paging = &mvm->fw_paging_db[i];
if (!paging->fw_paging_block) {
IWL_DEBUG_FW(mvm,
"Paging: block %d already freed, continue to next page\n",
i);
continue;
}
dma_unmap_page(mvm->trans->dev, paging->fw_paging_phys,
paging->fw_paging_size, DMA_BIDIRECTIONAL);
__free_pages(mvm->fw_paging_db[i].fw_paging_block,
get_order(mvm->fw_paging_db[i].fw_paging_size));
mvm->fw_paging_db[i].fw_paging_block = NULL;
__free_pages(paging->fw_paging_block,
get_order(paging->fw_paging_size));
paging->fw_paging_block = NULL;
}
kfree(mvm->trans->paging_download_buf);
mvm->trans->paging_download_buf = NULL;