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Bluetooth: ath3k: use usb_control_msg_send() and usb_control_msg_recv()

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The usb_control_msg_send() and usb_control_msg_recv() calls can return
an error if a "short" write/read happens, and they can handle data off
of the stack, so move the driver over to using those calls instead,
saving some logic when dynamically allocating memory.

v2: changed API of use usb_control_msg_send() and usb_control_msg_recv()

Cc: Marcel Holtmann <marcel@holtmann.org>
Cc: Johan Hedberg <johan.hedberg@gmail.com>
Link: https://lore.kernel.org/r/20200914153756.3412156-11-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20200923134348.23862-15-oneukum@suse.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Greg Kroah-Hartman 2020-09-23 15:43:48 +02:00
parent 10fbd979bd
commit dbb29de70a
1 changed files with 29 additions and 64 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

93
drivers/bluetooth/ath3k.c
View file

@ -212,19 +212,16 @@ static int ath3k_load_firmware(struct usb_device *udev,
BT_DBG("udev %p", udev);
pipe = usb_sndctrlpipe(udev, 0);
send_buf = kmalloc(BULK_SIZE, GFP_KERNEL);
if (!send_buf) {
BT_ERR("Can't allocate memory chunk for firmware");
return -ENOMEM;
}
memcpy(send_buf, firmware->data, FW_HDR_SIZE);
err = usb_control_msg(udev, pipe, USB_REQ_DFU_DNLOAD, USB_TYPE_VENDOR,
0, 0, send_buf, FW_HDR_SIZE,
USB_CTRL_SET_TIMEOUT);
if (err < 0) {
err = usb_control_msg_send(udev, 0, USB_REQ_DFU_DNLOAD, USB_TYPE_VENDOR,
0, 0, firmware->data, FW_HDR_SIZE,
USB_CTRL_SET_TIMEOUT, GFP_KERNEL);
if (err) {
BT_ERR("Can't change to loading configuration err");
goto error;
}
@ -259,44 +256,19 @@ error:
static int ath3k_get_state(struct usb_device *udev, unsigned char *state)
{
int ret, pipe = 0;
char *buf;
buf = kmalloc(sizeof(*buf), GFP_KERNEL);
if (!buf)
return -ENOMEM;
pipe = usb_rcvctrlpipe(udev, 0);
ret = usb_control_msg(udev, pipe, ATH3K_GETSTATE,
USB_TYPE_VENDOR | USB_DIR_IN, 0, 0,
buf, sizeof(*buf), USB_CTRL_SET_TIMEOUT);
*state = *buf;
kfree(buf);
return ret;
return usb_control_msg_recv(udev, 0, ATH3K_GETSTATE,
USB_TYPE_VENDOR | USB_DIR_IN, 0, 0,
state, 1, USB_CTRL_SET_TIMEOUT,
GFP_KERNEL);
}
static int ath3k_get_version(struct usb_device *udev,
struct ath3k_version *version)
{
int ret, pipe = 0;
struct ath3k_version *buf;
const int size = sizeof(*buf);
buf = kmalloc(size, GFP_KERNEL);
if (!buf)
return -ENOMEM;
pipe = usb_rcvctrlpipe(udev, 0);
ret = usb_control_msg(udev, pipe, ATH3K_GETVERSION,
USB_TYPE_VENDOR | USB_DIR_IN, 0, 0,
buf, size, USB_CTRL_SET_TIMEOUT);
memcpy(version, buf, size);
kfree(buf);
return ret;
return usb_control_msg_recv(udev, 0, ATH3K_GETVERSION,
USB_TYPE_VENDOR | USB_DIR_IN, 0, 0,
version, sizeof(*version), USB_CTRL_SET_TIMEOUT,
GFP_KERNEL);
}
static int ath3k_load_fwfile(struct usb_device *udev,
@ -316,13 +288,11 @@ static int ath3k_load_fwfile(struct usb_device *udev,
}
size = min_t(uint, count, FW_HDR_SIZE);
memcpy(send_buf, firmware->data, size);
pipe = usb_sndctrlpipe(udev, 0);
ret = usb_control_msg(udev, pipe, ATH3K_DNLOAD,
USB_TYPE_VENDOR, 0, 0, send_buf,
size, USB_CTRL_SET_TIMEOUT);
if (ret < 0) {
ret = usb_control_msg_send(udev, 0, ATH3K_DNLOAD, USB_TYPE_VENDOR, 0, 0,
firmware->data, size, USB_CTRL_SET_TIMEOUT,
GFP_KERNEL);
if (ret) {
BT_ERR("Can't change to loading configuration err");
kfree(send_buf);
return ret;
@ -355,23 +325,19 @@ static int ath3k_load_fwfile(struct usb_device *udev,
return 0;
}
static int ath3k_switch_pid(struct usb_device *udev)
static void ath3k_switch_pid(struct usb_device *udev)
{
int pipe = 0;
pipe = usb_sndctrlpipe(udev, 0);
return usb_control_msg(udev, pipe, USB_REG_SWITCH_VID_PID,
USB_TYPE_VENDOR, 0, 0,
NULL, 0, USB_CTRL_SET_TIMEOUT);
usb_control_msg_send(udev, 0, USB_REG_SWITCH_VID_PID, USB_TYPE_VENDOR,
0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT, GFP_KERNEL);
}
static int ath3k_set_normal_mode(struct usb_device *udev)
{
unsigned char fw_state;
int pipe = 0, ret;
int ret;
ret = ath3k_get_state(udev, &fw_state);
if (ret < 0) {
if (ret) {
BT_ERR("Can't get state to change to normal mode err");
return ret;
}
@ -381,10 +347,9 @@ static int ath3k_set_normal_mode(struct usb_device *udev)
return 0;
}
pipe = usb_sndctrlpipe(udev, 0);
return usb_control_msg(udev, pipe, ATH3K_SET_NORMAL_MODE,
USB_TYPE_VENDOR, 0, 0,
NULL, 0, USB_CTRL_SET_TIMEOUT);
return usb_control_msg_send(udev, 0, ATH3K_SET_NORMAL_MODE,
USB_TYPE_VENDOR, 0, 0, NULL, 0,
USB_CTRL_SET_TIMEOUT, GFP_KERNEL);
}
static int ath3k_load_patch(struct usb_device *udev)
@ -397,7 +362,7 @@ static int ath3k_load_patch(struct usb_device *udev)
int ret;
ret = ath3k_get_state(udev, &fw_state);
if (ret < 0) {
if (ret) {
BT_ERR("Can't get state to change to load ram patch err");
return ret;
}
@ -408,7 +373,7 @@ static int ath3k_load_patch(struct usb_device *udev)
}
ret = ath3k_get_version(udev, &fw_version);
if (ret < 0) {
if (ret) {
BT_ERR("Can't get version to change to load ram patch err");
return ret;
}
@ -449,13 +414,13 @@ static int ath3k_load_syscfg(struct usb_device *udev)
int clk_value, ret;
ret = ath3k_get_state(udev, &fw_state);
if (ret < 0) {
if (ret) {
BT_ERR("Can't get state to change to load configuration err");
return -EBUSY;
}
ret = ath3k_get_version(udev, &fw_version);
if (ret < 0) {
if (ret) {
BT_ERR("Can't get version to change to load ram patch err");
return ret;
}
@ -529,7 +494,7 @@ static int ath3k_probe(struct usb_interface *intf,
return ret;
}
ret = ath3k_set_normal_mode(udev);
if (ret < 0) {
if (ret) {
BT_ERR("Set normal mode failed");
return ret;
}