[PATCHv2 1/4] usb: gadget: fix unused-but-set-variale warnings

From: Michal Nazarewicz
Date: Tue May 31 2016 - 08:17:40 EST

Those are enabled with W=1 make option.

The patch leaves of some type-limits warnings which are caused by
generic macros used in a way where they produce always-false
conditions.

Signed-off-by: Michal Nazarewicz <mina86@xxxxxxxxxx>
---
drivers/usb/gadget/function/f_fs.c | 3 +--
drivers/usb/gadget/function/u_serial.c | 3 +--
drivers/usb/gadget/legacy/g_ffs.c | 15 +++++------
drivers/usb/gadget/udc/amd5536udc.c | 9 +------
drivers/usb/gadget/udc/bdc/bdc_cmd.c | 3 ---
drivers/usb/gadget/udc/bdc/bdc_ep.c | 4 ---
drivers/usb/gadget/udc/dummy_hcd.c | 5 ----
drivers/usb/gadget/udc/mv_udc_core.c | 9 ++-----
drivers/usb/gadget/udc/net2272.c | 4 ---
drivers/usb/gadget/udc/pch_udc.c | 46 +++++++++++++++-------------------
drivers/usb/gadget/udc/pxa27x_udc.c | 3 ---
drivers/usb/gadget/udc/udc-xilinx.c | 3 ---
12 files changed, 31 insertions(+), 76 deletions(-)

diff --git a/drivers/usb/gadget/function/f_fs.c b/drivers/usb/gadget/function/f_fs.c
index 73515d5..5062d1d 100644
--- a/drivers/usb/gadget/function/f_fs.c
+++ b/drivers/usb/gadget/function/f_fs.c
@@ -2227,8 +2227,8 @@ static int __ffs_data_got_strings(struct ffs_data *ffs,
{
u32 str_count, needed_count, lang_count;
struct usb_gadget_strings **stringtabs, *t;
- struct usb_string *strings, *s;
const char *data = _data;
+ struct usb_string *s;

ENTER();

@@ -2286,7 +2286,6 @@ static int __ffs_data_got_strings(struct ffs_data *ffs,
stringtabs = vla_ptr(vlabuf, d, stringtabs);
t = vla_ptr(vlabuf, d, stringtab);
s = vla_ptr(vlabuf, d, strings);
- strings = s;
}

/* For each language */
diff --git a/drivers/usb/gadget/function/u_serial.c b/drivers/usb/gadget/function/u_serial.c
index 3580f19..6ded634 100644
--- a/drivers/usb/gadget/function/u_serial.c
+++ b/drivers/usb/gadget/function/u_serial.c
@@ -907,7 +907,6 @@ static int gs_write(struct tty_struct *tty, const unsigned char *buf, int count)
{
struct gs_port *port = tty->driver_data;
unsigned long flags;
- int status;

pr_vdebug("gs_write: ttyGS%d (%p) writing %d bytes\n",
port->port_num, tty, count);
@@ -917,7 +916,7 @@ static int gs_write(struct tty_struct *tty, const unsigned char *buf, int count)
count = gs_buf_put(&port->port_write_buf, buf, count);
/* treat count == 0 as flush_chars() */
if (port->port_usb)
- status = gs_start_tx(port);
+ gs_start_tx(port);
spin_unlock_irqrestore(&port->port_lock, flags);

return count;
diff --git a/drivers/usb/gadget/legacy/g_ffs.c b/drivers/usb/gadget/legacy/g_ffs.c
index f85639e..6da7316 100644
--- a/drivers/usb/gadget/legacy/g_ffs.c
+++ b/drivers/usb/gadget/legacy/g_ffs.c
@@ -265,7 +265,7 @@ static void *functionfs_acquire_dev(struct ffs_dev *dev)
{
if (!try_module_get(THIS_MODULE))
return ERR_PTR(-ENOENT);
-
+
return NULL;
}

@@ -275,7 +275,7 @@ static void functionfs_release_dev(struct ffs_dev *dev)
}

/*
- * The caller of this function takes ffs_lock
+ * The caller of this function takes ffs_lock
*/
static int functionfs_ready_callback(struct ffs_data *ffs)
{
@@ -294,12 +294,12 @@ static int functionfs_ready_callback(struct ffs_data *ffs)
++missing_funcs;
gfs_registered = false;
}
-
+
return ret;
}

/*
- * The caller of this function takes ffs_lock
+ * The caller of this function takes ffs_lock
*/
static void functionfs_closed_callback(struct ffs_data *ffs)
{
@@ -347,17 +347,14 @@ static int gfs_bind(struct usb_composite_dev *cdev)

#ifdef CONFIG_USB_FUNCTIONFS_RNDIS
{
- struct f_rndis_opts *rndis_opts;
-
fi_rndis = usb_get_function_instance("rndis");
if (IS_ERR(fi_rndis)) {
ret = PTR_ERR(fi_rndis);
goto error;
}
- rndis_opts = container_of(fi_rndis, struct f_rndis_opts,
- func_inst);
#ifndef CONFIG_USB_FUNCTIONFS_ETH
- net = rndis_opts->net;
+ net = container_of(fi_rndis, struct f_rndis_opts,
+ func_inst)->net;
#endif
}
#endif
diff --git a/drivers/usb/gadget/udc/amd5536udc.c b/drivers/usb/gadget/udc/amd5536udc.c
index 39d70b4..ea03ca7 100644
--- a/drivers/usb/gadget/udc/amd5536udc.c
+++ b/drivers/usb/gadget/udc/amd5536udc.c
@@ -2340,7 +2340,6 @@ static irqreturn_t udc_data_in_isr(struct udc *dev, int ep_ix)
struct udc_ep *ep;
struct udc_request *req;
struct udc_data_dma *td;
- unsigned dma_done;
unsigned len;

ep = &dev->ep[ep_ix];
@@ -2385,13 +2384,8 @@ static irqreturn_t udc_data_in_isr(struct udc *dev, int ep_ix)
*/
if (use_dma_ppb_du) {
td = udc_get_last_dma_desc(req);
- if (td) {
- dma_done =
- AMD_GETBITS(td->status,
- UDC_DMA_IN_STS_BS);
- /* don't care DMA done */
+ if (td)
req->req.actual = req->req.length;
- }
} else {
/* assume all bytes transferred */
req->req.actual = req->req.length;
@@ -3417,4 +3411,3 @@ module_pci_driver(udc_pci_driver);
MODULE_DESCRIPTION(UDC_MOD_DESCRIPTION);
MODULE_AUTHOR("Thomas Dahlmann");
MODULE_LICENSE("GPL");
-
diff --git a/drivers/usb/gadget/udc/bdc/bdc_cmd.c b/drivers/usb/gadget/udc/bdc/bdc_cmd.c
index 6a4155c..4d5e918 100644
--- a/drivers/usb/gadget/udc/bdc/bdc_cmd.c
+++ b/drivers/usb/gadget/udc/bdc/bdc_cmd.c
@@ -57,7 +57,6 @@ static int bdc_submit_cmd(struct bdc *bdc, u32 cmd_sc,
u32 param0, u32 param1, u32 param2)
{
u32 temp, cmd_status;
- int reset_bdc = 0;
int ret;

temp = bdc_readl(bdc->regs, BDC_CMDSC);
@@ -94,7 +93,6 @@ static int bdc_submit_cmd(struct bdc *bdc, u32 cmd_sc,

case BDC_CMDS_INTL:
dev_err(bdc->dev, "BDC Internal error\n");
- reset_bdc = 1;
ret = -ECONNRESET;
break;

@@ -102,7 +100,6 @@ static int bdc_submit_cmd(struct bdc *bdc, u32 cmd_sc,
dev_err(bdc->dev,
"command timedout waited for %dusec\n",
BDC_CMD_TIMEOUT);
- reset_bdc = 1;
ret = -ECONNRESET;
break;
default:
diff --git a/drivers/usb/gadget/udc/bdc/bdc_ep.c b/drivers/usb/gadget/udc/bdc/bdc_ep.c
index d619950..650717e 100644
--- a/drivers/usb/gadget/udc/bdc/bdc_ep.c
+++ b/drivers/usb/gadget/udc/bdc/bdc_ep.c
@@ -702,11 +702,9 @@ static int ep0_queue(struct bdc_ep *ep, struct bdc_req *req)
/* Queue data stage */
static int ep0_queue_data_stage(struct bdc *bdc)
{
- struct usb_request *ep0_usb_req;
struct bdc_ep *ep;

dev_dbg(bdc->dev, "%s\n", __func__);
- ep0_usb_req = &bdc->ep0_req.usb_req;
ep = bdc->bdc_ep_array[1];
bdc->ep0_req.ep = ep;
bdc->ep0_req.usb_req.complete = NULL;
@@ -1393,10 +1391,8 @@ static int ep0_set_sel(struct bdc *bdc,
{
struct bdc_ep *ep;
u16 wLength;
- u16 wValue;

dev_dbg(bdc->dev, "%s\n", __func__);
- wValue = le16_to_cpu(setup_pkt->wValue);
wLength = le16_to_cpu(setup_pkt->wLength);
if (unlikely(wLength != 6)) {
dev_err(bdc->dev, "%s Wrong wLength:%d\n", __func__, wLength);
diff --git a/drivers/usb/gadget/udc/dummy_hcd.c b/drivers/usb/gadget/udc/dummy_hcd.c
index dde4445..77d0790 100644
--- a/drivers/usb/gadget/udc/dummy_hcd.c
+++ b/drivers/usb/gadget/udc/dummy_hcd.c
@@ -647,12 +647,10 @@ static int dummy_disable(struct usb_ep *_ep)
static struct usb_request *dummy_alloc_request(struct usb_ep *_ep,
gfp_t mem_flags)
{
- struct dummy_ep *ep;
struct dummy_request *req;

if (!_ep)
return NULL;
- ep = usb_ep_to_dummy_ep(_ep);

req = kzalloc(sizeof(*req), mem_flags);
if (!req)
@@ -2444,9 +2442,6 @@ static int dummy_start(struct usb_hcd *hcd)

static void dummy_stop(struct usb_hcd *hcd)
{
- struct dummy *dum;
-
- dum = hcd_to_dummy_hcd(hcd)->dum;
device_remove_file(dummy_dev(hcd_to_dummy_hcd(hcd)), &dev_attr_urbs);
dev_info(dummy_dev(hcd_to_dummy_hcd(hcd)), "stopped\n");
}
diff --git a/drivers/usb/gadget/udc/mv_udc_core.c b/drivers/usb/gadget/udc/mv_udc_core.c
index 81b6229..ce73b35 100644
--- a/drivers/usb/gadget/udc/mv_udc_core.c
+++ b/drivers/usb/gadget/udc/mv_udc_core.c
@@ -129,7 +129,7 @@ static int process_ep_req(struct mv_udc *udc, int index,
{
struct mv_dtd *curr_dtd;
struct mv_dqh *curr_dqh;
- int td_complete, actual, remaining_length;
+ int actual, remaining_length;
int i, direction;
int retval = 0;
u32 errors;
@@ -139,7 +139,6 @@ static int process_ep_req(struct mv_udc *udc, int index,
direction = index % 2;

curr_dtd = curr_req->head;
- td_complete = 0;
actual = curr_req->req.length;

for (i = 0; i < curr_req->dtd_count; i++) {
@@ -412,11 +411,8 @@ static int req_to_dtd(struct mv_req *req)
unsigned count;
int is_last, is_first = 1;
struct mv_dtd *dtd, *last_dtd = NULL;
- struct mv_udc *udc;
dma_addr_t dma;

- udc = req->ep->udc;
-
do {
dtd = build_dtd(req, &count, &dma, &is_last);
if (dtd == NULL)
@@ -567,7 +563,7 @@ static int mv_ep_disable(struct usb_ep *_ep)
struct mv_udc *udc;
struct mv_ep *ep;
struct mv_dqh *dqh;
- u32 bit_pos, epctrlx, direction;
+ u32 epctrlx, direction;
unsigned long flags;

ep = container_of(_ep, struct mv_ep, ep);
@@ -582,7 +578,6 @@ static int mv_ep_disable(struct usb_ep *_ep)
spin_lock_irqsave(&udc->lock, flags);

direction = ep_dir(ep);
- bit_pos = 1 << ((direction == EP_DIR_OUT ? 0 : 16) + ep->ep_num);

/* Reset the max packet length and the interrupt on Setup */
dqh->max_packet_length = 0;
diff --git a/drivers/usb/gadget/udc/net2272.c b/drivers/usb/gadget/udc/net2272.c
index 18f5ebd..7c61134 100644
--- a/drivers/usb/gadget/udc/net2272.c
+++ b/drivers/usb/gadget/udc/net2272.c
@@ -329,12 +329,10 @@ static int net2272_disable(struct usb_ep *_ep)
static struct usb_request *
net2272_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags)
{
- struct net2272_ep *ep;
struct net2272_request *req;

if (!_ep)
return NULL;
- ep = container_of(_ep, struct net2272_ep, ep);

req = kzalloc(sizeof(*req), gfp_flags);
if (!req)
@@ -348,10 +346,8 @@ net2272_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags)
static void
net2272_free_request(struct usb_ep *_ep, struct usb_request *_req)
{
- struct net2272_ep *ep;
struct net2272_request *req;

- ep = container_of(_ep, struct net2272_ep, ep);
if (!_ep || !_req)
return;

diff --git a/drivers/usb/gadget/udc/pch_udc.c b/drivers/usb/gadget/udc/pch_udc.c
index ebc51ec..48792fd 100644
--- a/drivers/usb/gadget/udc/pch_udc.c
+++ b/drivers/usb/gadget/udc/pch_udc.c
@@ -1730,14 +1730,14 @@ static int pch_udc_pcd_ep_disable(struct usb_ep *usbep)
if ((usbep->name == ep0_string) || !ep->ep.desc)
return -EINVAL;

- spin_lock_irqsave(&ep->dev->lock, iflags);
+ spin_lock_irqsave(&dev->lock, iflags);
empty_req_queue(ep);
ep->halted = 1;
pch_udc_ep_disable(ep);
- pch_udc_disable_ep_interrupts(ep->dev, PCH_UDC_EPINT(ep->in, ep->num));
+ pch_udc_disable_ep_interrupts(dev, PCH_UDC_EPINT(ep->in, ep->num));
ep->ep.desc = NULL;
INIT_LIST_HEAD(&ep->queue);
- spin_unlock_irqrestore(&ep->dev->lock, iflags);
+ spin_unlock_irqrestore(&dev->lock, iflags);
return 0;
}

@@ -1767,10 +1767,10 @@ static struct usb_request *pch_udc_alloc_request(struct usb_ep *usbep,
req->req.dma = DMA_ADDR_INVALID;
req->dma = DMA_ADDR_INVALID;
INIT_LIST_HEAD(&req->queue);
- if (!ep->dev->dma_addr)
+ if (!dev->dma_addr)
return &req->req;
/* ep0 in requests are allocated from data pool here */
- dma_desc = pci_pool_alloc(ep->dev->data_requests, gfp,
+ dma_desc = pci_pool_alloc(dev->data_requests, gfp,
&req->td_data_phys);
if (NULL == dma_desc) {
kfree(req);
@@ -1940,7 +1940,7 @@ static int pch_udc_pcd_dequeue(struct usb_ep *usbep,
if (!usbep || !usbreq || (!ep->ep.desc && ep->num))
return ret;
req = container_of(usbreq, struct pch_udc_request, req);
- spin_lock_irqsave(&ep->dev->lock, flags);
+ spin_lock_irqsave(&dev->lock, flags);
/* make sure it's still queued on this endpoint */
list_for_each_entry(req, &ep->queue, queue) {
if (&req->req == usbreq) {
@@ -1951,7 +1951,7 @@ static int pch_udc_pcd_dequeue(struct usb_ep *usbep,
break;
}
}
- spin_unlock_irqrestore(&ep->dev->lock, flags);
+ spin_unlock_irqrestore(&dev->lock, flags);
return ret;
}

@@ -1976,17 +1976,16 @@ static int pch_udc_pcd_set_halt(struct usb_ep *usbep, int halt)
ep = container_of(usbep, struct pch_udc_ep, ep);
if (!ep->ep.desc && !ep->num)
return -EINVAL;
- if (!ep->dev->driver || (ep->dev->gadget.speed == USB_SPEED_UNKNOWN))
+ if (!dev->driver || (dev->gadget.speed == USB_SPEED_UNKNOWN))
return -ESHUTDOWN;
spin_lock_irqsave(&udc_stall_spinlock, iflags);
if (list_empty(&ep->queue)) {
if (halt) {
if (ep->num == PCH_UDC_EP0)
- ep->dev->stall = 1;
+ dev->stall = 1;
pch_udc_ep_set_stall(ep);
- pch_udc_enable_ep_interrupts(ep->dev,
- PCH_UDC_EPINT(ep->in,
- ep->num));
+ pch_udc_enable_ep_interrupts(
+ dev, PCH_UDC_EPINT(ep->in, ep->num));
} else {
pch_udc_ep_clear_stall(ep);
}
@@ -2019,18 +2018,18 @@ static int pch_udc_pcd_set_wedge(struct usb_ep *usbep)
ep = container_of(usbep, struct pch_udc_ep, ep);
if (!ep->ep.desc && !ep->num)
return -EINVAL;
- if (!ep->dev->driver || (ep->dev->gadget.speed == USB_SPEED_UNKNOWN))
+ if (!dev->driver || (dev->gadget.speed == USB_SPEED_UNKNOWN))
return -ESHUTDOWN;
spin_lock_irqsave(&udc_stall_spinlock, iflags);
if (!list_empty(&ep->queue)) {
ret = -EAGAIN;
} else {
if (ep->num == PCH_UDC_EP0)
- ep->dev->stall = 1;
+ dev->stall = 1;
pch_udc_ep_set_stall(ep);
- pch_udc_enable_ep_interrupts(ep->dev,
+ pch_udc_enable_ep_interrupts(dev,
PCH_UDC_EPINT(ep->in, ep->num));
- ep->dev->prot_stall = 1;
+ dev->prot_stall = 1;
ret = 0;
}
spin_unlock_irqrestore(&udc_stall_spinlock, iflags);
@@ -2451,16 +2450,11 @@ static void pch_udc_svc_control_out(struct pch_udc_dev *dev)
*/
static void pch_udc_postsvc_epinters(struct pch_udc_dev *dev, int ep_num)
{
- struct pch_udc_ep *ep;
- struct pch_udc_request *req;
-
- ep = &dev->ep[UDC_EPIN_IDX(ep_num)];
- if (!list_empty(&ep->queue)) {
- req = list_entry(ep->queue.next, struct pch_udc_request, queue);
- pch_udc_enable_ep_interrupts(ep->dev,
- PCH_UDC_EPINT(ep->in, ep->num));
- pch_udc_ep_clear_nak(ep);
- }
+ struct pch_udc_ep *ep = &dev->ep[UDC_EPIN_IDX(ep_num)];
+ if (list_empty(&ep->queue))
+ return;
+ pch_udc_enable_ep_interrupts(ep->dev, PCH_UDC_EPINT(ep->in, ep->num));
+ pch_udc_ep_clear_nak(ep);
}

/**
diff --git a/drivers/usb/gadget/udc/pxa27x_udc.c b/drivers/usb/gadget/udc/pxa27x_udc.c
index 001a3b7..72aca2f 100644
--- a/drivers/usb/gadget/udc/pxa27x_udc.c
+++ b/drivers/usb/gadget/udc/pxa27x_udc.c
@@ -1829,9 +1829,6 @@ static void stop_activity(struct pxa_udc *udc, struct usb_gadget_driver *driver)
{
int i;

- /* don't disconnect drivers more than once */
- if (udc->gadget.speed == USB_SPEED_UNKNOWN)
- driver = NULL;
udc->gadget.speed = USB_SPEED_UNKNOWN;

for (i = 0; i < NR_USB_ENDPOINTS; i++)
diff --git a/drivers/usb/gadget/udc/udc-xilinx.c b/drivers/usb/gadget/udc/udc-xilinx.c
index 1cbb0ac..f8bf290 100644
--- a/drivers/usb/gadget/udc/udc-xilinx.c
+++ b/drivers/usb/gadget/udc/udc-xilinx.c
@@ -2055,7 +2055,6 @@ static int xudc_probe(struct platform_device *pdev)
struct device_node *np = pdev->dev.of_node;
struct resource *res;
struct xusb_udc *udc;
- struct xusb_ep *ep0;
int irq;
int ret;
u32 ier;
@@ -2119,8 +2118,6 @@ static int xudc_probe(struct platform_device *pdev)

xudc_eps_init(udc);

- ep0 = &udc->ep[0];
-
/* Set device address to 0.*/
udc->write_fn(udc->addr, XUSB_ADDRESS_OFFSET, 0);

--
2.8.0.rc3.226.g39d4020