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[35.245.152.114]) by smtp.gmail.com with ESMTPSA id i22-20020a05620a145600b0078d68b23254sm6270244qkl.107.2024.04.15.05.29.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 15 Apr 2024 05:29:35 -0700 (PDT) From: Ricardo Ribalda Date: Mon, 15 Apr 2024 12:29:34 +0000 Subject: [PATCH v3] media: usb: siano: Fix allocation of urbs Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20240415-smatch-v3-1-ed3f23f9d5ee@chromium.org> X-B4-Tracking: v=1; b=H4sIAK0dHWYC/2WMyw6CMBBFf4XM2jF9MFBc+R/GBdJCu4CaFhsN4 d8tLIzR5bm55ywQTXAmwqlYIJjkovNTBnkooLPtNBh0OjMIJkpWcoZxbOfOouqFJE2sJqkhn+/ B9O65hy7XzNbF2YfX3k18W/8SiSPDWpFmrGkVidu5s8GP7jEefRhgqyTxbdLHFMixIsGpkZWWj fox13V9A2jvzBPZAAAA To: Mauro Carvalho Chehab , Yasunari Takiguchi , Jean-Christophe Trotin , Lars-Peter Clausen , Dmitry Torokhov Cc: Hans Verkuil , linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, linux-input@vger.kernel.org, Ricardo Ribalda X-Mailer: b4 0.12.4 USB urbs must be allocated with usb_alloc_urb. Quoting the manual Only use this function (usb_init_urb) if you _really_ understand what you are doing. Fix the following smatch error: drivers/media/usb/siano/smsusb.c:53:38: warning: array of flexible structur= es Signed-off-by: Ricardo Ribalda --- Changes in v3: Thanks Hans - Remove unneeded NULL assignment - Use the proper variable :) - Link to v2: https://lore.kernel.org/r/20240415-smatch-v2-1-65215936d398@c= hromium.org Changes in v2: Thanks Hans - Only leave 1/6, the other ones are in another PR - Fix the return tag and NULLify the urbs on return - Link to v1: https://lore.kernel.org/r/20240410-smatch-v1-0-785d009a852b@c= hromium.org --- drivers/media/usb/siano/smsusb.c | 34 ++++++++++++++++++++++++---------- 1 file changed, 24 insertions(+), 10 deletions(-) diff --git a/drivers/media/usb/siano/smsusb.c b/drivers/media/usb/siano/sms= usb.c index 723510520d09..ba2c02e1070e 100644 --- a/drivers/media/usb/siano/smsusb.c +++ b/drivers/media/usb/siano/smsusb.c @@ -40,7 +40,7 @@ struct smsusb_urb_t { struct smscore_buffer_t *cb; struct smsusb_device_t *dev; =20 - struct urb urb; + struct urb *urb; =20 /* For the bottom half */ struct work_struct wq; @@ -160,7 +160,7 @@ static int smsusb_submit_urb(struct smsusb_device_t *de= v, } =20 usb_fill_bulk_urb( - &surb->urb, + surb->urb, dev->udev, usb_rcvbulkpipe(dev->udev, dev->in_ep), surb->cb->p, @@ -168,9 +168,9 @@ static int smsusb_submit_urb(struct smsusb_device_t *de= v, smsusb_onresponse, surb ); - surb->urb.transfer_flags |=3D URB_FREE_BUFFER; + surb->urb->transfer_flags |=3D URB_FREE_BUFFER; =20 - return usb_submit_urb(&surb->urb, GFP_ATOMIC); + return usb_submit_urb(surb->urb, GFP_ATOMIC); } =20 static void smsusb_stop_streaming(struct smsusb_device_t *dev) @@ -178,7 +178,7 @@ static void smsusb_stop_streaming(struct smsusb_device_= t *dev) int i; =20 for (i =3D 0; i < MAX_URBS; i++) { - usb_kill_urb(&dev->surbs[i].urb); + usb_kill_urb(dev->surbs[i].urb); if (dev->surbs[i].wq.func) cancel_work_sync(&dev->surbs[i].wq); =20 @@ -338,6 +338,8 @@ static void smsusb_term_device(struct usb_interface *in= tf) struct smsusb_device_t *dev =3D usb_get_intfdata(intf); =20 if (dev) { + int i; + dev->state =3D SMSUSB_DISCONNECTED; =20 smsusb_stop_streaming(dev); @@ -346,6 +348,9 @@ static void smsusb_term_device(struct usb_interface *in= tf) if (dev->coredev) smscore_unregister_device(dev->coredev); =20 + for (i =3D 0; i < MAX_URBS; i++) + usb_free_urb(dev->surbs[i].urb); + pr_debug("device 0x%p destroyed\n", dev); kfree(dev); } @@ -390,6 +395,7 @@ static int smsusb_init_device(struct usb_interface *int= f, int board_id) void *mdev; int i, rc; int align =3D 0; + int n_urb =3D 0; =20 /* create device object */ dev =3D kzalloc(sizeof(struct smsusb_device_t), GFP_KERNEL); @@ -461,16 +467,18 @@ static int smsusb_init_device(struct usb_interface *i= ntf, int board_id) dev->coredev->is_usb_device =3D true; =20 /* initialize urbs */ - for (i =3D 0; i < MAX_URBS; i++) { - dev->surbs[i].dev =3D dev; - usb_init_urb(&dev->surbs[i].urb); + for (n_urb =3D 0; n_urb < MAX_URBS; n_urb++) { + dev->surbs[n_urb].dev =3D dev; + dev->surbs[n_urb].urb =3D usb_alloc_urb(0, GFP_KERNEL); + if (!dev->surbs[n_urb].urb) + goto free_urbs; } =20 pr_debug("smsusb_start_streaming(...).\n"); rc =3D smsusb_start_streaming(dev); if (rc < 0) { pr_err("smsusb_start_streaming(...) failed\n"); - goto err_unregister_device; + goto free_urbs; } =20 dev->state =3D SMSUSB_ACTIVE; @@ -478,13 +486,19 @@ static int smsusb_init_device(struct usb_interface *i= ntf, int board_id) rc =3D smscore_start_device(dev->coredev); if (rc < 0) { pr_err("smscore_start_device(...) failed\n"); - goto err_unregister_device; + goto free_urbs; } =20 pr_debug("device 0x%p created\n", dev); =20 return rc; =20 +free_urbs: + for (i =3D 0; i < n_urb; i++) { + usb_free_urb(dev->surbs[i].urb); + dev->surbs[i].urb =3D NULL; + } + err_unregister_device: smsusb_term_device(intf); #ifdef CONFIG_MEDIA_CONTROLLER_DVB --- base-commit: 34d7bf1c8e59f5fbf438ee32c96389ebe41ca2e8 change-id: 20240410-smatch-8f235d50753d Best regards, --=20 Ricardo Ribalda