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[85.230.184.20]) by smtp.gmail.com with ESMTPSA id t8sm8786109lfl.51.2019.11.28.09.24.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 28 Nov 2019 09:24:42 -0800 (PST) Received: from johan by xi.terra with local (Exim 4.92.3) (envelope-from ) id 1iaNWz-0006wg-Pg; Thu, 28 Nov 2019 18:24:41 +0100 From: Johan Hovold To: Amitkumar Karwar , Siva Rebbagondla , Kalle Valo Cc: linux-wireless@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, Johan Hovold , stable , Prameela Rani Garnepudi Subject: [PATCH 4/5] rsi: fix non-atomic allocation in completion handler Date: Thu, 28 Nov 2019 18:22:03 +0100 Message-Id: <20191128172204.26600-5-johan@kernel.org> X-Mailer: git-send-email 2.24.0 In-Reply-To: <20191128172204.26600-1-johan@kernel.org> References: <20191128172204.26600-1-johan@kernel.org> MIME-Version: 1.0 Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org USB completion handlers are called in atomic context and must specifically not allocate memory using GFP_KERNEL. Fixes: a1854fae1414 ("rsi: improve RX packet handling in USB interface") Cc: stable # 4.17 Cc: Prameela Rani Garnepudi Signed-off-by: Johan Hovold --- drivers/net/wireless/rsi/rsi_91x_usb.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) diff --git a/drivers/net/wireless/rsi/rsi_91x_usb.c b/drivers/net/wireless/rsi/rsi_91x_usb.c index 2c869df1c62e..ead75574e10a 100644 --- a/drivers/net/wireless/rsi/rsi_91x_usb.c +++ b/drivers/net/wireless/rsi/rsi_91x_usb.c @@ -16,6 +16,7 @@ */ #include +#include #include #include "rsi_usb.h" #include "rsi_hal.h" @@ -29,7 +30,7 @@ MODULE_PARM_DESC(dev_oper_mode, "9[Wi-Fi STA + BT LE], 13[Wi-Fi STA + BT classic + BT LE]\n" "6[AP + BT classic], 14[AP + BT classic + BT LE]"); -static int rsi_rx_urb_submit(struct rsi_hw *adapter, u8 ep_num); +static int rsi_rx_urb_submit(struct rsi_hw *adapter, u8 ep_num, gfp_t flags); /** * rsi_usb_card_write() - This function writes to the USB Card. @@ -285,7 +286,7 @@ static void rsi_rx_done_handler(struct urb *urb) status = 0; out: - if (rsi_rx_urb_submit(dev->priv, rx_cb->ep_num)) + if (rsi_rx_urb_submit(dev->priv, rx_cb->ep_num, GFP_ATOMIC)) rsi_dbg(ERR_ZONE, "%s: Failed in urb submission", __func__); if (status) @@ -307,7 +308,7 @@ static void rsi_rx_urb_kill(struct rsi_hw *adapter, u8 ep_num) * * Return: 0 on success, a negative error code on failure. */ -static int rsi_rx_urb_submit(struct rsi_hw *adapter, u8 ep_num) +static int rsi_rx_urb_submit(struct rsi_hw *adapter, u8 ep_num, gfp_t mem_flags) { struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev; struct rx_usb_ctrl_block *rx_cb = &dev->rx_cb[ep_num - 1]; @@ -337,7 +338,7 @@ static int rsi_rx_urb_submit(struct rsi_hw *adapter, u8 ep_num) rsi_rx_done_handler, rx_cb); - status = usb_submit_urb(urb, GFP_KERNEL); + status = usb_submit_urb(urb, mem_flags); if (status) { rsi_dbg(ERR_ZONE, "%s: Failed in urb submission\n", __func__); dev_kfree_skb(skb); @@ -827,12 +828,12 @@ static int rsi_probe(struct usb_interface *pfunction, rsi_dbg(INIT_ZONE, "%s: Device Init Done\n", __func__); } - status = rsi_rx_urb_submit(adapter, WLAN_EP); + status = rsi_rx_urb_submit(adapter, WLAN_EP, GFP_KERNEL); if (status) goto err1; if (adapter->priv->coex_mode > 1) { - status = rsi_rx_urb_submit(adapter, BT_EP); + status = rsi_rx_urb_submit(adapter, BT_EP, GFP_KERNEL); if (status) goto err_kill_wlan_urb; }