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cdc-acm: beautify probe() 

This removes some overly long lines by renaming variables and giving
them local scope.

Signed-off-by: Oliver Neukum <oneukum@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Oliver Neukum 2016-07-14 15:41:34 +02:00 committed by Greg Kroah-Hartman
parent 7fae7bfb9a
commit cb42b63d89
1 changed files with 24 additions and 20 deletions
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44
drivers/usb/class/cdc-acm.c
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@ -1146,8 +1146,7 @@ static int acm_probe(struct usb_interface *intf,
const struct usb_device_id *id)
{
struct usb_cdc_union_desc *union_header = NULL;
struct usb_cdc_country_functional_desc *cfd = NULL;
struct usb_cdc_call_mgmt_descriptor *cmd = NULL;
struct usb_cdc_call_mgmt_descriptor *cmgmd = NULL;
unsigned char *buffer = intf->altsetting->extra;
int buflen = intf->altsetting->extralen;
struct usb_interface *control_interface;
@ -1156,13 +1155,13 @@ static int acm_probe(struct usb_interface *intf,
struct usb_endpoint_descriptor *epread = NULL;
struct usb_endpoint_descriptor *epwrite = NULL;
struct usb_device *usb_dev = interface_to_usbdev(intf);
struct usb_cdc_parsed_header hdr;
struct usb_cdc_parsed_header h;
struct acm *acm;
int minor;
int ctrlsize, readsize;
u8 *buf;
int call_interface_num = -1;
int data_interface_num = -1;
int call_intf_num = -1;
int data_intf_num = -1;
unsigned long quirks;
int num_rx_buf;
int i;
@ -1209,20 +1208,22 @@ static int acm_probe(struct usb_interface *intf,
}
}
cdc_parse_cdc_header(&hdr, intf, buffer, buflen);
union_header = hdr.usb_cdc_union_desc;
cmd = hdr.usb_cdc_call_mgmt_descriptor;
if (cmd)
call_interface_num = cmd->bDataInterface;
cdc_parse_cdc_header(&h, intf, buffer, buflen);
union_header = h.usb_cdc_union_desc;
cmgmd = h.usb_cdc_call_mgmt_descriptor;
if (cmgmd)
call_intf_num = cmgmd->bDataInterface;
if (!union_header) {
if (call_interface_num > 0) {
if (call_intf_num > 0) {
dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n");
/* quirks for Droids MuIn LCD */
if (quirks & NO_DATA_INTERFACE)
if (quirks & NO_DATA_INTERFACE) {
data_interface = usb_ifnum_to_if(usb_dev, 0);
else
data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = call_interface_num));
} else {
data_intf_num = call_intf_num;
data_interface = usb_ifnum_to_if(usb_dev, data_intf_num);
}
control_interface = intf;
} else {
if (intf->cur_altsetting->desc.bNumEndpoints != 3) {
@ -1236,8 +1237,9 @@ static int acm_probe(struct usb_interface *intf,
}
}
} else {
data_intf_num = union_header->bSlaveInterface0;
control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0);
data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = union_header->bSlaveInterface0));
data_interface = usb_ifnum_to_if(usb_dev, data_intf_num);
}
if (!control_interface || !data_interface) {
@ -1245,7 +1247,7 @@ static int acm_probe(struct usb_interface *intf,
return -ENODEV;
}
if (data_interface_num != call_interface_num)
if (data_intf_num != call_intf_num)
dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n");
if (control_interface == data_interface) {
@ -1340,8 +1342,8 @@ made_compressed_probe:
acm->data = data_interface;
acm->minor = minor;
acm->dev = usb_dev;
if (hdr.usb_cdc_acm_descriptor)
acm->ctrl_caps = hdr.usb_cdc_acm_descriptor->bmCapabilities;
if (h.usb_cdc_acm_descriptor)
acm->ctrl_caps = h.usb_cdc_acm_descriptor->bmCapabilities;
if (quirks & NO_CAP_LINE)
acm->ctrl_caps &= ~USB_CDC_CAP_LINE;
acm->ctrlsize = ctrlsize;
@ -1435,8 +1437,10 @@ made_compressed_probe:
if (i < 0)
goto alloc_fail7;
cfd = hdr.usb_cdc_country_functional_desc;
if (cfd) { /* export the country data */
if (h.usb_cdc_country_functional_desc) { /* export the country data */
struct usb_cdc_country_functional_desc * cfd =
h.usb_cdc_country_functional_desc;
acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL);
if (!acm->country_codes)
goto skip_countries;