linux-kernel - Re: [PATCH 5.10 1/2] iwlwifi: Fix softirq/hardirq disabling in iwl_pcie_gen2_enqueue

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <d-jJSpscDSj6GA3x0-9RE6fw-WaW7STDw46NzOgJ684IokIkyXNoZsR5xqNHZA7cpS81_MFvhvBzIoI_QGTbT5Im-CKI_AAp6fNzVfc8LX8=@protonmail.com>
Date:   Mon, 03 May 2021 11:20:40 +0000
From:   Jari Ruusu <jariruusu@...tonmail.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>,
        Jiri Kosina <jkosina@...e.cz>,
        Kalle Valo <kvalo@...eaurora.org>
Subject: Re: [PATCH 5.10 1/2] iwlwifi: Fix softirq/hardirq disabling in iwl_pcie_gen2_enqueue_hcmd()

On Sunday, May 2, 2021 2:03 PM, Greg Kroah-Hartman <gregkh@...uxfoundation.org> wrote:
> If you could provide backported patches to those kernels you think this
> is needed to, I can take them directly. Otherwise running sed isn't
> always the easiest thing to do on my end :)

iwlwifi: Fix softirq/hardirq disabling in iwl_pcie_enqueue_hcmd()
upstream commit 2800aadc18a64c96b051bcb7da8a7df7d505db3f,
backport for linux-5.4.y and linux-4.19.y (booted and ping tested)
Signed-off-by: Jari Ruusu <jariruusu@...tonmail.com>

--- a/drivers/net/wireless/intel/iwlwifi/pcie/tx.c
+++ b/drivers/net/wireless/intel/iwlwifi/pcie/tx.c
@@ -1544,6 +1544,7 @@ static int iwl_pcie_enqueue_hcmd(struct iwl_trans *trans,
 	u32 cmd_pos;
 	const u8 *cmddata[IWL_MAX_CMD_TBS_PER_TFD];
 	u16 cmdlen[IWL_MAX_CMD_TBS_PER_TFD];
+	unsigned long flags2;

 	if (WARN(!trans->wide_cmd_header &&
 		 group_id > IWL_ALWAYS_LONG_GROUP,
@@ -1627,10 +1628,10 @@ static int iwl_pcie_enqueue_hcmd(struct iwl_trans *trans,
 		goto free_dup_buf;
 	}

-	spin_lock_bh(&txq->lock);
+	spin_lock_irqsave(&txq->lock, flags2);

 	if (iwl_queue_space(trans, txq) < ((cmd->flags & CMD_ASYNC) ? 2 : 1)) {
-		spin_unlock_bh(&txq->lock);
+		spin_unlock_irqrestore(&txq->lock, flags2);

 		IWL_ERR(trans, "No space in command queue\n");
 		iwl_op_mode_cmd_queue_full(trans->op_mode);
@@ -1791,7 +1792,7 @@ static int iwl_pcie_enqueue_hcmd(struct iwl_trans *trans,
 	spin_unlock_irqrestore(&trans_pcie->reg_lock, flags);

  out:
-	spin_unlock_bh(&txq->lock);
+	spin_unlock_irqrestore(&txq->lock, flags2);
  free_dup_buf:
 	if (idx < 0)
 		kfree(dup_buf);

--
Jari Ruusu  4096R/8132F189 12D6 4C3A DCDA 0AA4 27BD  ACDF F073 3C80 8132 F189