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path: root/drivers/staging/line6/driver.c
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Diffstat (limited to 'drivers/staging/line6/driver.c')
-rw-r--r--drivers/staging/line6/driver.c103
1 files changed, 54 insertions, 49 deletions
diff --git a/drivers/staging/line6/driver.c b/drivers/staging/line6/driver.c
index f188ecee502f..e4078a92d399 100644
--- a/drivers/staging/line6/driver.c
+++ b/drivers/staging/line6/driver.c
@@ -168,19 +168,19 @@ static void line6_dump_urb(struct urb *urb)
#endif
/*
- Send raw message in pieces of wMaxPacketSize bytes.
+ Send raw message in pieces of max_packet_size bytes.
*/
int line6_send_raw_message(struct usb_line6 *line6, const char *buffer,
int size)
{
int i, done = 0;
+ int actual_size;
#if DO_DUMP_URB_SEND
line6_write_hexdump(line6, 'S', buffer, size);
#endif
- for (i = 0; i < size; i += line6->max_packet_size) {
- int partial;
+ for (i = 0; i < size; i += actual_size) {
const char *frag_buf = buffer + i;
int frag_size = min(line6->max_packet_size, size - i);
int retval;
@@ -189,7 +189,7 @@ int line6_send_raw_message(struct usb_line6 *line6, const char *buffer,
usb_sndintpipe(line6->usbdev,
line6->ep_control_write),
(char *)frag_buf, frag_size,
- &partial, LINE6_TIMEOUT * HZ);
+ &actual_size, LINE6_TIMEOUT * HZ);
if (retval) {
dev_err(line6->ifcdev,
@@ -197,7 +197,7 @@ int line6_send_raw_message(struct usb_line6 *line6, const char *buffer,
break;
}
- done += frag_size;
+ done += actual_size;
}
return done;
@@ -395,17 +395,44 @@ static void line6_data_received(struct urb *urb)
line6_start_listen(line6);
}
+static int line6_send(struct usb_line6 *line6, unsigned char *buf, size_t len)
+{
+ int retval;
+ unsigned int partial;
+
+#if DO_DUMP_URB_SEND
+ line6_write_hexdump(line6, 'S', buf, len);
+#endif
+
+ retval = usb_interrupt_msg(line6->usbdev,
+ usb_sndintpipe(line6->usbdev,
+ line6->ep_control_write),
+ buf, len, &partial,
+ LINE6_TIMEOUT * HZ);
+
+ if (retval) {
+ dev_err(line6->ifcdev,
+ "usb_interrupt_msg failed (%d)\n", retval);
+ }
+
+ if (partial != len) {
+ dev_err(line6->ifcdev,
+ "usb_interrupt_msg sent partial message (%d)\n",
+ retval);
+ }
+
+ return retval;
+}
+
/*
Send channel number (i.e., switch to a different sound).
*/
int line6_send_program(struct usb_line6 *line6, int value)
{
- int retval;
unsigned char *buffer;
- unsigned int partial;
-
- buffer = kmalloc(2, GFP_KERNEL);
+ size_t len = 2;
+ buffer = kmalloc(len, GFP_KERNEL);
if (!buffer) {
dev_err(line6->ifcdev, "out of memory\n");
return -ENOMEM;
@@ -414,20 +441,7 @@ int line6_send_program(struct usb_line6 *line6, int value)
buffer[0] = LINE6_PROGRAM_CHANGE | LINE6_CHANNEL_HOST;
buffer[1] = value;
-#if DO_DUMP_URB_SEND
- line6_write_hexdump(line6, 'S', buffer, 2);
-#endif
-
- retval = usb_interrupt_msg(line6->usbdev,
- usb_sndintpipe(line6->usbdev,
- line6->ep_control_write),
- buffer, 2, &partial, LINE6_TIMEOUT * HZ);
-
- if (retval)
- dev_err(line6->ifcdev, "usb_interrupt_msg failed (%d)\n", retval);
-
- kfree(buffer);
- return retval;
+ return line6_send(line6, buffer, len);
}
/*
@@ -435,12 +449,10 @@ int line6_send_program(struct usb_line6 *line6, int value)
*/
int line6_transmit_parameter(struct usb_line6 *line6, int param, int value)
{
- int retval;
unsigned char *buffer;
- unsigned int partial;
-
- buffer = kmalloc(3, GFP_KERNEL);
+ size_t len = 3;
+ buffer = kmalloc(len, GFP_KERNEL);
if (!buffer) {
dev_err(line6->ifcdev, "out of memory\n");
return -ENOMEM;
@@ -450,19 +462,7 @@ int line6_transmit_parameter(struct usb_line6 *line6, int param, int value)
buffer[1] = param;
buffer[2] = value;
-#if DO_DUMP_URB_SEND
- line6_write_hexdump(line6, 'S', buffer, 3);
-#endif
-
- retval = usb_interrupt_msg(line6->usbdev,
- usb_sndintpipe(line6->usbdev, line6->ep_control_write),
- buffer, 3, &partial, LINE6_TIMEOUT * HZ);
-
- if (retval)
- dev_err(line6->ifcdev, "usb_interrupt_msg failed (%d)\n", retval);
-
- kfree(buffer);
- return retval;
+ return line6_send(line6, buffer, len);
}
/*
@@ -476,8 +476,10 @@ int line6_read_data(struct usb_line6 *line6, int address, void *data, size_t dat
/* query the serial number: */
ret = usb_control_msg(usbdev, usb_sndctrlpipe(usbdev, 0), 0x67,
- USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
- (datalen << 8) | 0x21, address, NULL, 0, LINE6_TIMEOUT * HZ);
+ USB_TYPE_VENDOR | USB_RECIP_DEVICE
+ | USB_DIR_OUT,
+ (datalen << 8) | 0x21, address,
+ NULL, 0, LINE6_TIMEOUT * HZ);
if (ret < 0) {
dev_err(line6->ifcdev, "read request failed (error %d)\n", ret);
@@ -496,9 +498,7 @@ int line6_read_data(struct usb_line6 *line6, int address, void *data, size_t dat
"receive length failed (error %d)\n", ret);
return ret;
}
- }
- while (len == 0xff)
- ;
+ } while (len == 0xff);
if (len != datalen) {
/* should be equal or something went wrong */
@@ -682,10 +682,14 @@ static int line6_probe(struct usb_interface *interface, const struct usb_device_
return -ENODEV;
/* check vendor and product id */
- for (devtype = ARRAY_SIZE(line6_id_table) - 1; devtype--;)
- if ((le16_to_cpu(usbdev->descriptor.idVendor) == line6_id_table[devtype].idVendor) &&
- (le16_to_cpu(usbdev->descriptor.idProduct) == line6_id_table[devtype].idProduct))
+ for (devtype = ARRAY_SIZE(line6_id_table) - 1; devtype--;) {
+ u16 vendor = le16_to_cpu(usbdev->descriptor.idVendor);
+ u16 product = le16_to_cpu(usbdev->descriptor.idProduct);
+
+ if (vendor == line6_id_table[devtype].idVendor
+ && product == line6_id_table[devtype].idProduct)
break;
+ }
if (devtype < 0)
return -ENODEV;
@@ -1036,9 +1040,10 @@ static void line6_disconnect(struct usb_interface *interface)
dev_info(&interface->dev, "Line6 %s now disconnected\n", line6->properties->name);
- for (i = LINE6_MAX_DEVICES; i--;)
+ for (i = LINE6_MAX_DEVICES; i--;) {
if (line6_devices[i] == line6)
line6_devices[i] = NULL;
+ }
}
line6_destruct(interface);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.