USB requests in SourceSink function are allocated in sourcesink_get_alt()
function, so we prefer to free them rather in sourcesink_disable() than
in source_sink_complete() when request is completed with error. It provides
better symetry in resource management and improves code readability.
Signed-off-by: Robert Baldyga <r.bald...@samsung.com>
---
drivers/usb/gadget/function/f_sourcesink.c | 63 ++++++++++++++++++++++++------
1 file changed, 51 insertions(+), 12 deletions(-)
diff --git a/drivers/usb/gadget/function/f_sourcesink.c
b/drivers/usb/gadget/function/f_sourcesink.c
index e950031..6193b47 100644
--- a/drivers/usb/gadget/function/f_sourcesink.c
+++ b/drivers/usb/gadget/function/f_sourcesink.c
@@ -44,6 +44,11 @@ struct f_sourcesink {
struct usb_ep *iso_out_ep;
int cur_alt;
+ struct usb_request **in_reqs;
+ struct usb_request **out_reqs;
+ struct usb_request **iso_in_reqs;
+ struct usb_request **iso_out_reqs;
+
unsigned pattern;
unsigned isoc_interval;
unsigned isoc_maxpacket;
@@ -550,7 +555,6 @@ static void source_sink_complete(struct usb_ep *ep, struct
usb_request *req)
req->actual, req->length);
if (ep == ss->out_ep)
check_read_data(ss, req);
- free_ep_req(ep, req);
return;
case -EOVERFLOW: /* buffer overrun on read means that
@@ -579,7 +583,7 @@ static int source_sink_start_ep(struct f_sourcesink *ss,
bool is_in,
bool is_iso, int speed)
{
struct usb_ep *ep;
- struct usb_request *req;
+ struct usb_request **reqs;
int i, size, qlen, status = 0;
if (is_iso) {
@@ -604,19 +608,23 @@ static int source_sink_start_ep(struct f_sourcesink *ss,
bool is_in,
qlen = ss->bulk_qlen;
size = 0;
}
-
+
+ reqs = kzalloc(qlen * sizeof(*reqs), GFP_ATOMIC);
+
for (i = 0; i < qlen; i++) {
- req = ss_alloc_ep_req(ep, size);
- if (!req)
- return -ENOMEM;
+ reqs[i] = ss_alloc_ep_req(ep, size);
+ if (!reqs[i]) {
+ status = -ENOMEM;
+ goto err;
+ }
- req->complete = source_sink_complete;
+ reqs[i]->complete = source_sink_complete;
if (is_in)
- reinit_write_data(ep, req);
+ reinit_write_data(ep, reqs[i]);
else if (ss->pattern != 2)
- memset(req->buf, 0x55, req->length);
+ memset(reqs[i]->buf, 0x55, reqs[i]->length);
- status = usb_ep_queue(ep, req, GFP_ATOMIC);
+ status = usb_ep_queue(ep, reqs[i], GFP_ATOMIC);
if (status) {
struct usb_composite_dev *cdev;
@@ -624,12 +632,30 @@ static int source_sink_start_ep(struct f_sourcesink *ss,
bool is_in,
ERROR(cdev, "start %s%s %s --> %d\n",
is_iso ? "ISO-" : "", is_in ? "IN" : "OUT",
ep->name, status);
- free_ep_req(ep, req);
- return status;
+ free_ep_req(ep, reqs[i]);
+ goto err;
+ }
+
+ if (is_iso) {
+ if (is_in)
+ ss->iso_in_reqs = reqs;
+ else
+ ss->iso_out_reqs = reqs;
+ } else {
+ if (is_in)
+ ss->in_reqs = reqs;
+ else
+ ss->out_reqs = reqs;
}
}
return status;
+
+err:
+ while (--i)
+ free_ep_req(ep, reqs[i]);
+ kfree(reqs);
+ return status;
}
static void disable_source_sink(struct f_sourcesink *ss)
@@ -754,8 +780,21 @@ static int sourcesink_get_alt(struct usb_function *f,
unsigned intf)
static void sourcesink_disable(struct usb_function *f)
{
struct f_sourcesink *ss = func_to_ss(f);
+ int i;
disable_source_sink(ss);
+
+ for (i = 0; i < ss->bulk_qlen; ++i) {
+ free_ep_req(ss->in_ep, ss->in_reqs[i]);
+ free_ep_req(ss->out_ep, ss->out_reqs[i]);
+ }
+
+ if (ss->iso_in_ep) {
+ for (i = 0; i < ss->iso_qlen; ++i) {
+ free_ep_req(ss->iso_in_ep, ss->iso_in_reqs[i]);
+ free_ep_req(ss->iso_out_ep, ss->iso_out_reqs[i]);
+ }
+ }
}
/*-------------------------------------------------------------------------*/
--
1.9.1
--
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