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Message-Id: <20160805183501.11993-8-eu@felipetonello.com>
Date: Fri, 5 Aug 2016 19:34:59 +0100
From: "Felipe F. Tonello" <eu@...ipetonello.com>
To: linux-usb@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, Felipe Balbi <balbi@...nel.org>,
Michal Nazarewicz <mina86@...a86.com>
Subject: [PATCH v3 7/9] usb: gadget: remove useless parameter in alloc_ep_req()
The default_length parameter of alloc_ep_req was not really necessary
and gadget drivers would almost always create an inline function to pass
the same value to len and default_len.
So this patch also removes duplicate code from few drivers.
Signed-off-by: Felipe F. Tonello <eu@...ipetonello.com>
---
drivers/usb/gadget/function/f_hid.c | 10 ++--------
drivers/usb/gadget/function/f_loopback.c | 9 +--------
drivers/usb/gadget/function/f_midi.c | 10 ++--------
drivers/usb/gadget/function/f_sourcesink.c | 11 ++---------
drivers/usb/gadget/u_f.c | 7 +++----
drivers/usb/gadget/u_f.h | 3 +--
6 files changed, 11 insertions(+), 39 deletions(-)
diff --git a/drivers/usb/gadget/function/f_hid.c b/drivers/usb/gadget/function/f_hid.c
index 51980c50546d..e82a7468252e 100644
--- a/drivers/usb/gadget/function/f_hid.c
+++ b/drivers/usb/gadget/function/f_hid.c
@@ -362,12 +362,6 @@ static int f_hidg_open(struct inode *inode, struct file *fd)
/*-------------------------------------------------------------------------*/
/* usb_function */
-static inline struct usb_request *hidg_alloc_ep_req(struct usb_ep *ep,
- unsigned length)
-{
- return alloc_ep_req(ep, length, length);
-}
-
static void hidg_set_report_complete(struct usb_ep *ep, struct usb_request *req)
{
struct f_hidg *hidg = (struct f_hidg *) req->context;
@@ -549,8 +543,8 @@ static int hidg_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
*/
for (i = 0; i < hidg->qlen && status == 0; i++) {
struct usb_request *req =
- hidg_alloc_ep_req(hidg->out_ep,
- hidg->report_length);
+ alloc_ep_req(hidg->out_ep,
+ hidg->report_length);
if (req) {
req->complete = hidg_set_report_complete;
req->context = hidg;
diff --git a/drivers/usb/gadget/function/f_loopback.c b/drivers/usb/gadget/function/f_loopback.c
index 3a9f8f9c77bd..701ee0f11c33 100644
--- a/drivers/usb/gadget/function/f_loopback.c
+++ b/drivers/usb/gadget/function/f_loopback.c
@@ -306,13 +306,6 @@ static void disable_loopback(struct f_loopback *loop)
VDBG(cdev, "%s disabled\n", loop->function.name);
}
-static inline struct usb_request *lb_alloc_ep_req(struct usb_ep *ep, int len)
-{
- struct f_loopback *loop = ep->driver_data;
-
- return alloc_ep_req(ep, len, loop->buflen);
-}
-
static int alloc_requests(struct usb_composite_dev *cdev,
struct f_loopback *loop)
{
@@ -333,7 +326,7 @@ static int alloc_requests(struct usb_composite_dev *cdev,
if (!in_req)
goto fail;
- out_req = lb_alloc_ep_req(loop->out_ep, 0);
+ out_req = alloc_ep_req(loop->out_ep, loop->buflen);
if (!out_req)
goto fail_in;
diff --git a/drivers/usb/gadget/function/f_midi.c b/drivers/usb/gadget/function/f_midi.c
index 3a47596afcab..abf26364b46f 100644
--- a/drivers/usb/gadget/function/f_midi.c
+++ b/drivers/usb/gadget/function/f_midi.c
@@ -208,12 +208,6 @@ static struct usb_gadget_strings *midi_strings[] = {
NULL,
};
-static inline struct usb_request *midi_alloc_ep_req(struct usb_ep *ep,
- unsigned length)
-{
- return alloc_ep_req(ep, length, length);
-}
-
static const uint8_t f_midi_cin_length[] = {
0, 0, 2, 3, 3, 1, 2, 3, 3, 3, 3, 3, 2, 2, 3, 1
};
@@ -365,7 +359,7 @@ static int f_midi_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
/* pre-allocate write usb requests to use on f_midi_transmit. */
while (kfifo_avail(&midi->in_req_fifo)) {
struct usb_request *req =
- midi_alloc_ep_req(midi->in_ep, midi->buflen);
+ alloc_ep_req(midi->in_ep, midi->buflen);
if (req == NULL)
return -ENOMEM;
@@ -379,7 +373,7 @@ static int f_midi_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
/* allocate a bunch of read buffers and queue them all at once. */
for (i = 0; i < midi->qlen && err == 0; i++) {
struct usb_request *req =
- midi_alloc_ep_req(midi->out_ep, midi->buflen);
+ alloc_ep_req(midi->out_ep, midi->buflen);
if (req == NULL)
return -ENOMEM;
diff --git a/drivers/usb/gadget/function/f_sourcesink.c b/drivers/usb/gadget/function/f_sourcesink.c
index df0189ddfdd5..517d78d6da78 100644
--- a/drivers/usb/gadget/function/f_sourcesink.c
+++ b/drivers/usb/gadget/function/f_sourcesink.c
@@ -291,13 +291,6 @@ static struct usb_gadget_strings *sourcesink_strings[] = {
/*-------------------------------------------------------------------------*/
-static inline struct usb_request *ss_alloc_ep_req(struct usb_ep *ep, int len)
-{
- struct f_sourcesink *ss = ep->driver_data;
-
- return alloc_ep_req(ep, len, ss->buflen);
-}
-
static void disable_ep(struct usb_composite_dev *cdev, struct usb_ep *ep)
{
int value;
@@ -606,11 +599,11 @@ static int source_sink_start_ep(struct f_sourcesink *ss, bool is_in,
} else {
ep = is_in ? ss->in_ep : ss->out_ep;
qlen = ss->bulk_qlen;
- size = 0;
+ size = ss->buflen;
}
for (i = 0; i < qlen; i++) {
- req = ss_alloc_ep_req(ep, size);
+ req = alloc_ep_req(ep, size);
if (!req)
return -ENOMEM;
diff --git a/drivers/usb/gadget/u_f.c b/drivers/usb/gadget/u_f.c
index d1933b0b76c3..18839732c840 100644
--- a/drivers/usb/gadget/u_f.c
+++ b/drivers/usb/gadget/u_f.c
@@ -14,15 +14,14 @@
#include "u_f.h"
#include <linux/usb/ch9.h>
-struct usb_request *alloc_ep_req(struct usb_ep *ep, int len, int default_len)
+struct usb_request *alloc_ep_req(struct usb_ep *ep, size_t len)
{
struct usb_request *req;
req = usb_ep_alloc_request(ep, GFP_ATOMIC);
if (req) {
- req->length = len ?: default_len;
- if (usb_endpoint_dir_out(ep->desc))
- req->length = usb_ep_align(ep, req->length);
+ req->length = usb_endpoint_dir_out(ep->desc) ?
+ usb_ep_align(ep, len) : len;
req->buf = kmalloc(req->length, GFP_ATOMIC);
if (!req->buf) {
usb_ep_free_request(ep, req);
diff --git a/drivers/usb/gadget/u_f.h b/drivers/usb/gadget/u_f.h
index 69a1d10df04f..7d53a4773d1a 100644
--- a/drivers/usb/gadget/u_f.h
+++ b/drivers/usb/gadget/u_f.h
@@ -53,14 +53,13 @@ struct usb_request;
*
* @ep: the endpoint to allocate a usb_request
* @len: usb_requests's buffer suggested size
- * @default_len: used if @len is not provided, ie, is 0
*
* In case @ep direction is OUT, the @len will be aligned to ep's
* wMaxPacketSize. In order to avoid memory leaks or drops, *always* use
* usb_requests's length (req->length) to refer to the allocated buffer size.
* Requests allocated via alloc_ep_req() *must* be freed by free_ep_req().
*/
-struct usb_request *alloc_ep_req(struct usb_ep *ep, size_t len, int default_len);
+struct usb_request *alloc_ep_req(struct usb_ep *ep, size_t len);
/* Frees a usb_request previously allocated by alloc_ep_req() */
static inline void free_ep_req(struct usb_ep *ep, struct usb_request *req)
--
2.9.0
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