iwlwifi: pcie: fix context info memory leak

If the image loader allocation fails, we leak all the previously
allocated memory. Fix this.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/iwlwifi.20210115130252.97172cbaa67c.I3473233d0ad01a71aa9400832fb2b9f494d88a11@changeid

diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/ctxt-info-gen3.c b/drivers/net/wireless/intel/iwlwifi/pcie/ctxt-info-gen3.c
index 342a53e..5b5134d 100644 (file)
--- a/drivers/net/wireless/intel/iwlwifi/pcie/ctxt-info-gen3.c
+++ b/drivers/net/wireless/intel/iwlwifi/pcie/ctxt-info-gen3.c
@@ -198,8 +198,10 @@ int iwl_pcie_ctxt_info_gen3_init(struct iwl_trans *trans,
        /* Allocate IML */
        iml_img = dma_alloc_coherent(trans->dev, trans->iml_len,
                                     &trans_pcie->iml_dma_addr, GFP_KERNEL);
-       if (!iml_img)
-               return -ENOMEM;
+       if (!iml_img) {
+               ret = -ENOMEM;
+               goto err_free_ctxt_info;
+       }
 
        memcpy(iml_img, trans->iml, trans->iml_len);
 
@@ -237,6 +239,11 @@ int iwl_pcie_ctxt_info_gen3_init(struct iwl_trans *trans,
 
        return 0;
 
+err_free_ctxt_info:
+       dma_free_coherent(trans->dev, sizeof(*trans_pcie->ctxt_info_gen3),
+                         trans_pcie->ctxt_info_gen3,
+                         trans_pcie->ctxt_info_dma_addr);
+       trans_pcie->ctxt_info_gen3 = NULL;
 err_free_prph_info:
        dma_free_coherent(trans->dev,
                          sizeof(*prph_info),