linux-kernel - [PATCH 4.4 01/72] iwlwifi: pcie: fix rb

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Date:   Tue, 10 Mar 2020 13:38:14 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Johannes Berg <johannes.berg@...el.com>,
        Luca Coelho <luciano.coelho@...el.com>,
        Ajay Kaher <akaher@...are.com>, Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.4 01/72] iwlwifi: pcie: fix rb_allocator workqueue allocation

From: Johannes Berg <johannes.berg@...el.com>

commit 8188a18ee2e48c9a7461139838048363bfce3fef upstream

We don't handle failures in the rb_allocator workqueue allocation
correctly. To fix that, move the code earlier so the cleanup is
easier and we don't have to undo all the interrupt allocations in
this case.

Signed-off-by: Johannes Berg <johannes.berg@...el.com>
Signed-off-by: Luca Coelho <luciano.coelho@...el.com>
[Ajay: Rewrote this patch for v4.4.y, as 4.4.y codebase is different from mainline]
Signed-off-by: Ajay Kaher <akaher@...are.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/wireless/iwlwifi/pcie/rx.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/iwlwifi/pcie/rx.c b/drivers/net/wireless/iwlwifi/pcie/rx.c
index d6f9858ff2de4..7fdb3ad9f53d8 100644
--- a/drivers/net/wireless/iwlwifi/pcie/rx.c
+++ b/drivers/net/wireless/iwlwifi/pcie/rx.c
@@ -708,9 +708,13 @@ int iwl_pcie_rx_init(struct iwl_trans *trans)
 		if (err)
 			return err;
 	}
-	if (!rba->alloc_wq)
+	if (!rba->alloc_wq) {
 		rba->alloc_wq = alloc_workqueue("rb_allocator",
 						WQ_HIGHPRI | WQ_UNBOUND, 1);
+		if (!rba->alloc_wq)
+			return -ENOMEM;
+	}
+
 	INIT_WORK(&rba->rx_alloc, iwl_pcie_rx_allocator_work);
 
 	cancel_work_sync(&rba->rx_alloc);
-- 
2.20.1