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authorAlan Stern <stern@rowland.harvard.edu>2007-01-22 11:58:34 -0500
committerGreg Kroah-Hartman <gregkh@suse.de>2007-02-07 15:44:40 -0800
commit1096f780d0b9d6bade2d42bf823e81db3e553abe (patch)
treed72bf456ec6a0d1b720839d157d5867059051775 /drivers
parent629e4427aa817d5c9f11885420abf54b8f5967dc (diff)
usb-storage: use first bulk endpoints, not last
According to the Bulk-Only spec, usb-storage is supposed to use the _first_ bulk-in and bulk-out endpoints it finds, not the _last_. And while we're at it, we ought to test the direction of the interrupt endpoint as well. This patch (as842) makes both changes. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Cc: Matthew Dharm <mdharm-usb@one-eyed-alien.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/usb/storage/usb.c23
1 files changed, 12 insertions, 11 deletions
diff --git a/drivers/usb/storage/usb.c b/drivers/usb/storage/usb.c
index 70644506651..7e7ec29782f 100644
--- a/drivers/usb/storage/usb.c
+++ b/drivers/usb/storage/usb.c
@@ -731,26 +731,27 @@ static int get_pipes(struct us_data *us)
struct usb_endpoint_descriptor *ep_int = NULL;
/*
- * Find the endpoints we need.
+ * Find the first endpoint of each type we need.
* We are expecting a minimum of 2 endpoints - in and out (bulk).
- * An optional interrupt is OK (necessary for CBI protocol).
+ * An optional interrupt-in is OK (necessary for CBI protocol).
* We will ignore any others.
*/
for (i = 0; i < altsetting->desc.bNumEndpoints; i++) {
ep = &altsetting->endpoint[i].desc;
- /* Is it a BULK endpoint? */
if (usb_endpoint_xfer_bulk(ep)) {
- /* BULK in or out? */
- if (usb_endpoint_dir_in(ep))
- ep_in = ep;
- else
- ep_out = ep;
+ if (usb_endpoint_dir_in(ep)) {
+ if (!ep_in)
+ ep_in = ep;
+ } else {
+ if (!ep_out)
+ ep_out = ep;
+ }
}
- /* Is it an interrupt endpoint? */
- else if (usb_endpoint_xfer_int(ep)) {
- ep_int = ep;
+ else if (usb_endpoint_is_int_in(ep)) {
+ if (!ep_int)
+ ep_int = ep;
}
}