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iwlwifi: pcie: avoid potential PNVM leaks

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If we erroneously try to set the PNVM data again after it has
already been set, we could leak the old DMA memory. Avoid that
and warn, we shouldn't be doing this.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Fixes: 6972592850 ("iwlwifi: read and parse PNVM file")
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/iwlwifi.20210115130252.929c2d680429.I086b9490e6c005f3bcaa881b617e9f61908160f3@changeid
This commit is contained in:
Johannes Berg 2021-01-15 13:05:49 +02:00 committed by Kalle Valo
parent 5c56d862c7
commit 34b9434cd0
1 changed files with 3 additions and 0 deletions
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3
drivers/net/wireless/intel/iwlwifi/pcie/ctxt-info-gen3.c
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@ -294,6 +294,9 @@ int iwl_trans_pcie_ctx_info_gen3_set_pnvm(struct iwl_trans *trans,
return ret;
}
if (WARN_ON(prph_sc_ctrl->pnvm_cfg.pnvm_size))
return -EBUSY;
prph_sc_ctrl->pnvm_cfg.pnvm_base_addr =
cpu_to_le64(trans_pcie->pnvm_dram.physical);
prph_sc_ctrl->pnvm_cfg.pnvm_size =