android/android_kernel_samsung_sm8650
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

USB: usblp: refactor endpoint retrieval

Browse Source 
Use the new endpoint helpers to lookup the required bulk-out endpoint
and the depending on protocol likewise required bulk-in endpoint.

Cc: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johan Hovold 2017-03-17 11:35:50 +01:00 committed by Greg Kroah-Hartman
parent 80070a408c
commit 5370860a1f
1 changed files with 13 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

35
drivers/usb/class/usblp.c
View File

@ -1239,8 +1239,9 @@ static int usblp_select_alts(struct usblp *usblp)
{
struct usb_interface *if_alt;
struct usb_host_interface *ifd;
struct usb_endpoint_descriptor *epd, *epwrite, *epread;
int p, i, e;
struct usb_endpoint_descriptor *epwrite, *epread;
int p, i;
int res;
if_alt = usblp->intf;
@ -1260,31 +1261,21 @@ static int usblp_select_alts(struct usblp *usblp)
ifd->desc.bInterfaceProtocol > USBLP_LAST_PROTOCOL)
continue;
/* Look for bulk OUT and IN endpoints. */
epwrite = epread = NULL;
for (e = 0; e < ifd->desc.bNumEndpoints; e++) {
epd = &ifd->endpoint[e].desc;
if (usb_endpoint_is_bulk_out(epd))
if (!epwrite)
epwrite = epd;
if (usb_endpoint_is_bulk_in(epd))
if (!epread)
epread = epd;
/* Look for the expected bulk endpoints. */
if (ifd->desc.bInterfaceProtocol > 1) {
res = usb_find_common_endpoints(ifd,
&epread, &epwrite, NULL, NULL);
} else {
epread = NULL;
res = usb_find_bulk_out_endpoint(ifd, &epwrite);
}
/* Ignore buggy hardware without the right endpoints. */
if (!epwrite || (ifd->desc.bInterfaceProtocol > 1 && !epread))
if (res)
continue;
/*
* Turn off reads for USB_CLASS_PRINTER/1/1 (unidirectional)
* interfaces and buggy bidirectional printers.
*/
if (ifd->desc.bInterfaceProtocol == 1) {
epread = NULL;
} else if (usblp->quirks & USBLP_QUIRK_BIDIR) {
/* Turn off reads for buggy bidirectional printers. */
if (usblp->quirks & USBLP_QUIRK_BIDIR) {
printk(KERN_INFO "usblp%d: Disabling reads from "
"problematic bidirectional printer\n",
usblp->minor);