From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> To: himadrispandya@gmail.com, dvyukov@google.com, linux-usb@vger.kernel.org Cc: perex@perex.cz, tiwai@suse.com, stern@rowland.harvard.ed, linux-kernel@vger.kernel.org, marcel@holtmann.org, johan.hedberg@gmail.com, linux-bluetooth@vger.kernel.org, alsa-devel@alsa-project.org, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Juergen Stuber <starblue@users.sourceforge.net>, legousb-devel@lists.sourceforge.net Subject: [PATCH v3 05/11] USB: legousbtower: use usb_control_msg_recv() Date: Mon, 14 Sep 2020 17:37:50 +0200 [thread overview] Message-ID: <20200914153756.3412156-6-gregkh@linuxfoundation.org> (raw) In-Reply-To: <20200914153756.3412156-1-gregkh@linuxfoundation.org> The usb_control_msg_recv() function can handle data on the stack, as well as properly detecting short reads, so move to use that function instead of the older usb_control_msg() call. This ends up removing a lot of extra lines in the driver. Cc: Juergen Stuber <starblue@users.sourceforge.net> Cc: legousb-devel@lists.sourceforge.net Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- v3: - no change from v2 v2: - no change from v1 drivers/usb/misc/legousbtower.c | 60 +++++++++++---------------------- 1 file changed, 19 insertions(+), 41 deletions(-) diff --git a/drivers/usb/misc/legousbtower.c b/drivers/usb/misc/legousbtower.c index f922544056de..c3583df4c324 100644 --- a/drivers/usb/misc/legousbtower.c +++ b/drivers/usb/misc/legousbtower.c @@ -308,15 +308,9 @@ static int tower_open(struct inode *inode, struct file *file) int subminor; int retval = 0; struct usb_interface *interface; - struct tower_reset_reply *reset_reply; + struct tower_reset_reply reset_reply; int result; - reset_reply = kmalloc(sizeof(*reset_reply), GFP_KERNEL); - if (!reset_reply) { - retval = -ENOMEM; - goto exit; - } - nonseekable_open(inode, file); subminor = iminor(inode); @@ -347,15 +341,11 @@ static int tower_open(struct inode *inode, struct file *file) } /* reset the tower */ - result = usb_control_msg(dev->udev, - usb_rcvctrlpipe(dev->udev, 0), - LEGO_USB_TOWER_REQUEST_RESET, - USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE, - 0, - 0, - reset_reply, - sizeof(*reset_reply), - 1000); + result = usb_control_msg_recv(dev->udev, 0, + LEGO_USB_TOWER_REQUEST_RESET, + USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE, + 0, 0, + &reset_reply, sizeof(reset_reply), 1000); if (result < 0) { dev_err(&dev->udev->dev, "LEGO USB Tower reset control request failed\n"); @@ -394,7 +384,6 @@ static int tower_open(struct inode *inode, struct file *file) mutex_unlock(&dev->lock); exit: - kfree(reset_reply); return retval; } @@ -753,7 +742,7 @@ static int tower_probe(struct usb_interface *interface, const struct usb_device_ struct device *idev = &interface->dev; struct usb_device *udev = interface_to_usbdev(interface); struct lego_usb_tower *dev; - struct tower_get_version_reply *get_version_reply = NULL; + struct tower_get_version_reply get_version_reply; int retval = -ENOMEM; int result; @@ -798,34 +787,25 @@ static int tower_probe(struct usb_interface *interface, const struct usb_device_ dev->interrupt_in_interval = interrupt_in_interval ? interrupt_in_interval : dev->interrupt_in_endpoint->bInterval; dev->interrupt_out_interval = interrupt_out_interval ? interrupt_out_interval : dev->interrupt_out_endpoint->bInterval; - get_version_reply = kmalloc(sizeof(*get_version_reply), GFP_KERNEL); - if (!get_version_reply) { - retval = -ENOMEM; - goto error; - } - /* get the firmware version and log it */ - result = usb_control_msg(udev, - usb_rcvctrlpipe(udev, 0), - LEGO_USB_TOWER_REQUEST_GET_VERSION, - USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE, - 0, - 0, - get_version_reply, - sizeof(*get_version_reply), - 1000); - if (result != sizeof(*get_version_reply)) { - if (result >= 0) - result = -EIO; + result = usb_control_msg_recv(udev, 0, + LEGO_USB_TOWER_REQUEST_GET_VERSION, + USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE, + 0, + 0, + &get_version_reply, + sizeof(get_version_reply), + 1000); + if (!result) { dev_err(idev, "get version request failed: %d\n", result); retval = result; goto error; } dev_info(&interface->dev, "LEGO USB Tower firmware version is %d.%d build %d\n", - get_version_reply->major, - get_version_reply->minor, - le16_to_cpu(get_version_reply->build_no)); + get_version_reply.major, + get_version_reply.minor, + le16_to_cpu(get_version_reply.build_no)); /* we can register the device now, as it is ready */ usb_set_intfdata(interface, dev); @@ -844,11 +824,9 @@ static int tower_probe(struct usb_interface *interface, const struct usb_device_ USB_MAJOR, dev->minor); exit: - kfree(get_version_reply); return retval; error: - kfree(get_version_reply); tower_delete(dev); return retval; } -- 2.28.0
WARNING: multiple messages have this Message-ID (diff)
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> To: himadrispandya@gmail.com, dvyukov@google.com, linux-usb@vger.kernel.org Cc: alsa-devel@alsa-project.org, Juergen Stuber <starblue@users.sourceforge.net>, johan.hedberg@gmail.com, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, marcel@holtmann.org, legousb-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org, tiwai@suse.com, stern@rowland.harvard.ed, linux-bluetooth@vger.kernel.org Subject: [PATCH v3 05/11] USB: legousbtower: use usb_control_msg_recv() Date: Mon, 14 Sep 2020 17:37:50 +0200 [thread overview] Message-ID: <20200914153756.3412156-6-gregkh@linuxfoundation.org> (raw) In-Reply-To: <20200914153756.3412156-1-gregkh@linuxfoundation.org> The usb_control_msg_recv() function can handle data on the stack, as well as properly detecting short reads, so move to use that function instead of the older usb_control_msg() call. This ends up removing a lot of extra lines in the driver. Cc: Juergen Stuber <starblue@users.sourceforge.net> Cc: legousb-devel@lists.sourceforge.net Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- v3: - no change from v2 v2: - no change from v1 drivers/usb/misc/legousbtower.c | 60 +++++++++++---------------------- 1 file changed, 19 insertions(+), 41 deletions(-) diff --git a/drivers/usb/misc/legousbtower.c b/drivers/usb/misc/legousbtower.c index f922544056de..c3583df4c324 100644 --- a/drivers/usb/misc/legousbtower.c +++ b/drivers/usb/misc/legousbtower.c @@ -308,15 +308,9 @@ static int tower_open(struct inode *inode, struct file *file) int subminor; int retval = 0; struct usb_interface *interface; - struct tower_reset_reply *reset_reply; + struct tower_reset_reply reset_reply; int result; - reset_reply = kmalloc(sizeof(*reset_reply), GFP_KERNEL); - if (!reset_reply) { - retval = -ENOMEM; - goto exit; - } - nonseekable_open(inode, file); subminor = iminor(inode); @@ -347,15 +341,11 @@ static int tower_open(struct inode *inode, struct file *file) } /* reset the tower */ - result = usb_control_msg(dev->udev, - usb_rcvctrlpipe(dev->udev, 0), - LEGO_USB_TOWER_REQUEST_RESET, - USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE, - 0, - 0, - reset_reply, - sizeof(*reset_reply), - 1000); + result = usb_control_msg_recv(dev->udev, 0, + LEGO_USB_TOWER_REQUEST_RESET, + USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE, + 0, 0, + &reset_reply, sizeof(reset_reply), 1000); if (result < 0) { dev_err(&dev->udev->dev, "LEGO USB Tower reset control request failed\n"); @@ -394,7 +384,6 @@ static int tower_open(struct inode *inode, struct file *file) mutex_unlock(&dev->lock); exit: - kfree(reset_reply); return retval; } @@ -753,7 +742,7 @@ static int tower_probe(struct usb_interface *interface, const struct usb_device_ struct device *idev = &interface->dev; struct usb_device *udev = interface_to_usbdev(interface); struct lego_usb_tower *dev; - struct tower_get_version_reply *get_version_reply = NULL; + struct tower_get_version_reply get_version_reply; int retval = -ENOMEM; int result; @@ -798,34 +787,25 @@ static int tower_probe(struct usb_interface *interface, const struct usb_device_ dev->interrupt_in_interval = interrupt_in_interval ? interrupt_in_interval : dev->interrupt_in_endpoint->bInterval; dev->interrupt_out_interval = interrupt_out_interval ? interrupt_out_interval : dev->interrupt_out_endpoint->bInterval; - get_version_reply = kmalloc(sizeof(*get_version_reply), GFP_KERNEL); - if (!get_version_reply) { - retval = -ENOMEM; - goto error; - } - /* get the firmware version and log it */ - result = usb_control_msg(udev, - usb_rcvctrlpipe(udev, 0), - LEGO_USB_TOWER_REQUEST_GET_VERSION, - USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE, - 0, - 0, - get_version_reply, - sizeof(*get_version_reply), - 1000); - if (result != sizeof(*get_version_reply)) { - if (result >= 0) - result = -EIO; + result = usb_control_msg_recv(udev, 0, + LEGO_USB_TOWER_REQUEST_GET_VERSION, + USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE, + 0, + 0, + &get_version_reply, + sizeof(get_version_reply), + 1000); + if (!result) { dev_err(idev, "get version request failed: %d\n", result); retval = result; goto error; } dev_info(&interface->dev, "LEGO USB Tower firmware version is %d.%d build %d\n", - get_version_reply->major, - get_version_reply->minor, - le16_to_cpu(get_version_reply->build_no)); + get_version_reply.major, + get_version_reply.minor, + le16_to_cpu(get_version_reply.build_no)); /* we can register the device now, as it is ready */ usb_set_intfdata(interface, dev); @@ -844,11 +824,9 @@ static int tower_probe(struct usb_interface *interface, const struct usb_device_ USB_MAJOR, dev->minor); exit: - kfree(get_version_reply); return retval; error: - kfree(get_version_reply); tower_delete(dev); return retval; } -- 2.28.0
next prev parent reply other threads:[~2020-09-14 15:43 UTC|newest] Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-09-14 15:37 [PATCH v3 00/11] USB: new USB control message helper functions Greg Kroah-Hartman 2020-09-14 15:37 ` Greg Kroah-Hartman 2020-09-14 15:37 ` [PATCH v3 01/11] USB: move snd_usb_pipe_sanity_check into the USB core Greg Kroah-Hartman 2020-09-14 15:37 ` Greg Kroah-Hartman 2020-09-14 15:37 ` [PATCH v3 02/11] USB: add usb_control_msg_send() and usb_control_msg_recv() Greg Kroah-Hartman 2020-09-14 15:37 ` Greg Kroah-Hartman 2020-09-14 15:37 ` [PATCH v3 03/11] USB: core: message.c: use usb_control_msg_send() in a few places Greg Kroah-Hartman 2020-09-14 15:37 ` Greg Kroah-Hartman 2020-09-14 15:37 ` [PATCH v3 04/11] USB: core: hub.c: " Greg Kroah-Hartman 2020-09-14 15:37 ` Greg Kroah-Hartman 2020-09-14 18:06 ` Alan Stern 2020-09-14 18:06 ` Alan Stern 2020-09-16 9:06 ` Greg Kroah-Hartman 2020-09-16 9:06 ` Greg Kroah-Hartman 2020-09-14 15:37 ` Greg Kroah-Hartman [this message] 2020-09-14 15:37 ` [PATCH v3 05/11] USB: legousbtower: use usb_control_msg_recv() Greg Kroah-Hartman 2020-09-14 15:37 ` [PATCH v3 06/11] sound: usx2y: move to use usb_control_msg_send() Greg Kroah-Hartman 2020-09-14 15:37 ` Greg Kroah-Hartman 2020-09-14 15:37 ` [PATCH v3 07/11] sound: 6fire: move to use usb_control_msg_send() and usb_control_msg_recv() Greg Kroah-Hartman 2020-09-14 15:37 ` Greg Kroah-Hartman 2020-09-14 15:37 ` [PATCH v3 08/11] sound: line6: " Greg Kroah-Hartman 2020-09-14 15:37 ` Greg Kroah-Hartman 2020-09-14 15:37 ` [PATCH v3 09/11] sound: hiface: move to use usb_control_msg_send() Greg Kroah-Hartman 2020-09-14 15:37 ` Greg Kroah-Hartman 2020-09-14 15:37 ` [PATCH v3 10/11] Bluetooth: ath3k: use usb_control_msg_send() and usb_control_msg_recv() Greg Kroah-Hartman 2020-09-14 15:37 ` Greg Kroah-Hartman 2020-09-14 15:37 ` [PATCH v3 11/11] ALSA: remove calls to usb_pipe_type_check for control endpoints Greg Kroah-Hartman 2020-09-14 15:37 ` Greg Kroah-Hartman
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