linux-kernel - [PATCH 1/2] wifi: wilc1000: set atomic flag on kmemdup in srcu critical section

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Message-Id: <20240410-wilc_srcu_to_rcu-v1-1-a9ff5b10feaa@bootlin.com>
Date: Wed, 10 Apr 2024 09:10:33 +0200
From: Alexis Lothoré <alexis.lothore@...tlin.com>
To: Ajay Singh <ajay.kathat@...rochip.com>, 
 Claudiu Beznea <claudiu.beznea@...on.dev>, Kalle Valo <kvalo@...nel.org>
Cc: Thomas Petazzoni <thomas.petazzoni@...tlin.com>, 
 linux-wireless@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Alexis Lothoré <alexis.lothore@...tlin.com>
Subject: [PATCH 1/2] wifi: wilc1000: set atomic flag on kmemdup in srcu
 critical section

In order to prepare wilc1000 driver switch from SRCU to RCU, make sure that
allocators are provided with the GFP_ATOMIC flag when called in a critical
read section.

Signed-off-by: Alexis Lothoré <alexis.lothore@...tlin.com>
---
 drivers/net/wireless/microchip/wilc1000/hif.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireless/microchip/wilc1000/hif.c b/drivers/net/wireless/microchip/wilc1000/hif.c
index f1085ccb7eed..3925ca653e80 100644
--- a/drivers/net/wireless/microchip/wilc1000/hif.c
+++ b/drivers/net/wireless/microchip/wilc1000/hif.c
@@ -1594,7 +1594,7 @@ void wilc_network_info_received(struct wilc *wilc, u8 *buffer, u32 length)
 	msg->body.net_info.rssi = buffer[8];
 	msg->body.net_info.mgmt = kmemdup(&buffer[9],
 					  msg->body.net_info.frame_len,
-					  GFP_KERNEL);
+					  GFP_ATOMIC);
 	if (!msg->body.net_info.mgmt) {
 		kfree(msg);
 		goto out;

-- 
2.44.0