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Message-Id: <20190814165750.465849264@linuxfoundation.org>
Date: Wed, 14 Aug 2019 19:02:04 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org,
Emmanuel Grumbach <emmanuel.grumbach@...el.com>,
Johannes Berg <johannes.berg@...el.com>
Subject: [PATCH 4.14 66/69] iwlwifi: dont unmap as page memory that was mapped as single
From: Emmanuel Grumbach <emmanuel.grumbach@...el.com>
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@...r.kernel.org
Fixes: 3cd1980b0cdf ("iwlwifi: pcie: introduce new tfd and tb formats")
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@...el.com>
Signed-off-by: Johannes Berg <johannes.berg@...el.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
drivers/net/wireless/intel/iwlwifi/pcie/tx.c | 2 ++
1 file changed, 2 insertions(+)
--- a/drivers/net/wireless/intel/iwlwifi/pcie/tx.c
+++ b/drivers/net/wireless/intel/iwlwifi/pcie/tx.c
@@ -401,6 +401,8 @@ static void iwl_pcie_tfd_unmap(struct iw
DMA_TO_DEVICE);
}
+ meta->tbs = 0;
+
if (trans->cfg->use_tfh) {
struct iwl_tfh_tfd *tfd_fh = (void *)tfd;
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