[PATCH] usb: gadget: Use fallthrough pseudo-keyword

From: Gustavo A. R. Silva
Date: Tue Jul 07 2020 - 13:09:37 EST

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Replace the existing /* fall through */ comments and its variants with
the new pseudo-keyword macro fallthrough[1]. Also, remove unnecessary
fall-through markings when it is the case.

[1] https://www.kernel.org/doc/html/latest/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-through

Signed-off-by: Gustavo A. R. Silva <gustavoars@xxxxxxxxxx>
---
drivers/usb/gadget/composite.c | 16 ++++++++--------
drivers/usb/gadget/function/f_fs.c | 2 +-
drivers/usb/gadget/function/f_hid.c | 2 +-
drivers/usb/gadget/function/f_mass_storage.c | 2 +-
drivers/usb/gadget/function/f_phonet.c | 4 ++--
drivers/usb/gadget/function/f_printer.c | 6 +++---
drivers/usb/gadget/function/f_rndis.c | 2 +-
drivers/usb/gadget/function/f_tcm.c | 2 +-
drivers/usb/gadget/function/u_ether.c | 4 ++--
drivers/usb/gadget/function/u_serial.c | 6 +++---
drivers/usb/gadget/legacy/inode.c | 7 +++----
drivers/usb/gadget/udc/dummy_hcd.c | 12 ++++++------
drivers/usb/gadget/udc/goku_udc.c | 9 ++++++---
drivers/usb/gadget/udc/omap_udc.c | 4 ++--
drivers/usb/gadget/udc/s3c2410_udc.c | 4 ++--
drivers/usb/gadget/udc/tegra-xudc.c | 2 +-
16 files changed, 43 insertions(+), 41 deletions(-)

diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c
index 5c1eb96a5c57..7ad648e53c05 100644
--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -72,17 +72,17 @@ function_descriptors(struct usb_function *f,
descriptors = f->ssp_descriptors;
if (descriptors)
break;
- /* FALLTHROUGH */
+ fallthrough;
case USB_SPEED_SUPER:
descriptors = f->ss_descriptors;
if (descriptors)
break;
- /* FALLTHROUGH */
+ fallthrough;
case USB_SPEED_HIGH:
descriptors = f->hs_descriptors;
if (descriptors)
break;
- /* FALLTHROUGH */
+ fallthrough;
default:
descriptors = f->fs_descriptors;
}
@@ -170,20 +170,20 @@ int config_ep_by_speed_and_alt(struct usb_gadget *g,
want_comp_desc = 1;
break;
}
- /* fall through */
+ fallthrough;
case USB_SPEED_SUPER:
if (gadget_is_superspeed(g)) {
speed_desc = f->ss_descriptors;
want_comp_desc = 1;
break;
}
- /* fall through */
+ fallthrough;
case USB_SPEED_HIGH:
if (gadget_is_dualspeed(g)) {
speed_desc = f->hs_descriptors;
break;
}
- /* fall through */
+ fallthrough;
default:
speed_desc = f->fs_descriptors;
}
@@ -237,7 +237,7 @@ int config_ep_by_speed_and_alt(struct usb_gadget *g,
case USB_ENDPOINT_XFER_ISOC:
/* mult: bits 1:0 of bmAttributes */
_ep->mult = (comp_desc->bmAttributes & 0x3) + 1;
- /* fall through */
+ fallthrough;
case USB_ENDPOINT_XFER_BULK:
case USB_ENDPOINT_XFER_INT:
_ep->maxburst = comp_desc->bMaxBurst + 1;
@@ -1697,7 +1697,7 @@ composite_setup(struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl)
if (!gadget_is_dualspeed(gadget) ||
gadget->speed >= USB_SPEED_SUPER)
break;
- /* FALLTHROUGH */
+ fallthrough;
case USB_DT_CONFIG:
value = config_desc(cdev, w_value);
if (value >= 0)
diff --git a/drivers/usb/gadget/function/f_fs.c b/drivers/usb/gadget/function/f_fs.c
index 490d353d5fde..5ff900e540c8 100644
--- a/drivers/usb/gadget/function/f_fs.c
+++ b/drivers/usb/gadget/function/f_fs.c
@@ -2726,7 +2726,7 @@ static void __ffs_event_add(struct ffs_data *ffs,
switch (type) {
case FUNCTIONFS_RESUME:
rem_type2 = FUNCTIONFS_SUSPEND;
- /* FALL THROUGH */
+ fallthrough;
case FUNCTIONFS_SUSPEND:
case FUNCTIONFS_SETUP:
rem_type1 = type;
diff --git a/drivers/usb/gadget/function/f_hid.c b/drivers/usb/gadget/function/f_hid.c
index df671acdd464..1125f4715830 100644
--- a/drivers/usb/gadget/function/f_hid.c
+++ b/drivers/usb/gadget/function/f_hid.c
@@ -477,7 +477,7 @@ static void hidg_set_report_complete(struct usb_ep *ep, struct usb_request *req)
break;
default:
ERROR(cdev, "Set report failed %d\n", req->status);
- /* FALLTHROUGH */
+ fallthrough;
case -ECONNABORTED: /* hardware forced ep reset */
case -ECONNRESET: /* request dequeued */
case -ESHUTDOWN: /* disconnect from host */
diff --git a/drivers/usb/gadget/function/f_mass_storage.c b/drivers/usb/gadget/function/f_mass_storage.c
index 950d2a85f098..331c951d72dc 100644
--- a/drivers/usb/gadget/function/f_mass_storage.c
+++ b/drivers/usb/gadget/function/f_mass_storage.c
@@ -2039,7 +2039,7 @@ static int do_scsi_command(struct fsg_common *common)
case RELEASE:
case RESERVE:
case SEND_DIAGNOSTIC:
- /* Fall through */
+ fallthrough;

default:
unknown_cmnd:
diff --git a/drivers/usb/gadget/function/f_phonet.c b/drivers/usb/gadget/function/f_phonet.c
index d7f6cc51b7ec..0b468f5d55bc 100644
--- a/drivers/usb/gadget/function/f_phonet.c
+++ b/drivers/usb/gadget/function/f_phonet.c
@@ -212,7 +212,7 @@ static void pn_tx_complete(struct usb_ep *ep, struct usb_request *req)
case -ESHUTDOWN: /* disconnected */
case -ECONNRESET: /* disabled */
dev->stats.tx_aborted_errors++;
- /* fall through */
+ fallthrough;
default:
dev->stats.tx_errors++;
}
@@ -360,7 +360,7 @@ static void pn_rx_complete(struct usb_ep *ep, struct usb_request *req)
/* Do resubmit in these cases: */
case -EOVERFLOW: /* request buffer overflow */
dev->stats.rx_over_errors++;
- /* fall through */
+ fallthrough;
default:
dev->stats.rx_errors++;
break;
diff --git a/drivers/usb/gadget/function/f_printer.c b/drivers/usb/gadget/function/f_printer.c
index 9c7ed2539ff7..ec15f7637e40 100644
--- a/drivers/usb/gadget/function/f_printer.c
+++ b/drivers/usb/gadget/function/f_printer.c
@@ -285,7 +285,7 @@ static void rx_complete(struct usb_ep *ep, struct usb_request *req)

/* data overrun */
case -EOVERFLOW:
- /* FALLTHROUGH */
+ fallthrough;

default:
DBG(dev, "rx status %d\n", status);
@@ -304,7 +304,7 @@ static void tx_complete(struct usb_ep *ep, struct usb_request *req)
switch (req->status) {
default:
VDBG(dev, "tx err %d\n", req->status);
- /* FALLTHROUGH */
+ fallthrough;
case -ECONNRESET: /* unlink */
case -ESHUTDOWN: /* disconnect etc */
break;
@@ -919,7 +919,7 @@ static bool gprinter_req_match(struct usb_function *f,
if (!w_value && !w_length &&
!(USB_DIR_IN & ctrl->bRequestType))
break;
- /* fall through */
+ fallthrough;
default:
return false;
}
diff --git a/drivers/usb/gadget/function/f_rndis.c b/drivers/usb/gadget/function/f_rndis.c
index 0d8e4a364ca6..9534c8ab62a8 100644
--- a/drivers/usb/gadget/function/f_rndis.c
+++ b/drivers/usb/gadget/function/f_rndis.c
@@ -426,7 +426,7 @@ static void rndis_response_complete(struct usb_ep *ep, struct usb_request *req)
DBG(cdev, "RNDIS %s response error %d, %d/%d\n",
ep->name, status,
req->actual, req->length);
- /* FALLTHROUGH */
+ fallthrough;
case 0:
if (ep != rndis->notify)
break;
diff --git a/drivers/usb/gadget/function/f_tcm.c b/drivers/usb/gadget/function/f_tcm.c
index eaf556ceac32..d94b814328c8 100644
--- a/drivers/usb/gadget/function/f_tcm.c
+++ b/drivers/usb/gadget/function/f_tcm.c
@@ -1150,7 +1150,7 @@ static int usbg_submit_command(struct f_uas *fu,
default:
pr_debug_once("Unsupported prio_attr: %02x.\n",
cmd_iu->prio_attr);
- /* fall through */
+ fallthrough;
case UAS_SIMPLE_TAG:
cmd->prio_attr = TCM_SIMPLE_TAG;
break;
diff --git a/drivers/usb/gadget/function/u_ether.c b/drivers/usb/gadget/function/u_ether.c
index fbe96ef1ac7a..0230458b4de2 100644
--- a/drivers/usb/gadget/function/u_ether.c
+++ b/drivers/usb/gadget/function/u_ether.c
@@ -321,7 +321,7 @@ static void rx_complete(struct usb_ep *ep, struct usb_request *req)
/* data overrun */
case -EOVERFLOW:
dev->net->stats.rx_over_errors++;
- /* FALLTHROUGH */
+ fallthrough;

default:
dev->net->stats.rx_errors++;
@@ -444,7 +444,7 @@ static void tx_complete(struct usb_ep *ep, struct usb_request *req)
default:
dev->net->stats.tx_errors++;
VDBG(dev, "tx err %d\n", req->status);
- /* FALLTHROUGH */
+ fallthrough;
case -ECONNRESET: /* unlink */
case -ESHUTDOWN: /* disconnect etc */
dev_kfree_skb_any(skb);
diff --git a/drivers/usb/gadget/function/u_serial.c b/drivers/usb/gadget/function/u_serial.c
index 3cfc6e2eba71..c1e5e72748d4 100644
--- a/drivers/usb/gadget/function/u_serial.c
+++ b/drivers/usb/gadget/function/u_serial.c
@@ -386,7 +386,7 @@ static void gs_rx_push(struct work_struct *work)
/* presumably a transient fault */
pr_warn("ttyGS%d: unexpected RX status %d\n",
port->port_num, req->status);
- /* FALLTHROUGH */
+ fallthrough;
case 0:
/* normal completion */
break;
@@ -472,7 +472,7 @@ static void gs_write_complete(struct usb_ep *ep, struct usb_request *req)
/* presumably a transient fault */
pr_warn("%s: unexpected %s status %d\n",
__func__, ep->name, req->status);
- /* FALL THROUGH */
+ fallthrough;
case 0:
/* normal completion */
gs_start_tx(port);
@@ -871,7 +871,7 @@ static void gs_console_complete_out(struct usb_ep *ep, struct usb_request *req)
default:
pr_warn("%s: unexpected %s status %d\n",
__func__, ep->name, req->status);
- /* fall through */
+ fallthrough;
case 0:
/* normal completion */
spin_lock(&cons->lock);
diff --git a/drivers/usb/gadget/legacy/inode.c b/drivers/usb/gadget/legacy/inode.c
index 9ee0bfe7bcda..1b430b36d0a6 100644
--- a/drivers/usb/gadget/legacy/inode.c
+++ b/drivers/usb/gadget/legacy/inode.c
@@ -312,7 +312,7 @@ get_ready_ep (unsigned f_flags, struct ep_data *epdata, bool is_write)
case STATE_EP_READY: /* not configured yet */
if (is_write)
return 0;
- // FALLTHRU
+ fallthrough;
case STATE_EP_UNBOUND: /* clean disconnect */
break;
// case STATE_EP_DISABLED: /* "can't happen" */
@@ -1084,7 +1084,7 @@ next_event (struct dev_data *dev, enum usb_gadgetfs_event_type type)
case GADGETFS_DISCONNECT:
if (dev->state == STATE_DEV_SETUP)
dev->setup_abort = 1;
- // FALL THROUGH
+ fallthrough;
case GADGETFS_CONNECT:
dev->ev_next = 0;
break;
@@ -1381,7 +1381,6 @@ gadgetfs_setup (struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl)
make_qualifier (dev);
break;
case USB_DT_OTHER_SPEED_CONFIG:
- // FALLTHROUGH
case USB_DT_CONFIG:
value = config_buf (dev,
w_value >> 8,
@@ -1718,7 +1717,7 @@ gadgetfs_suspend (struct usb_gadget *gadget)
case STATE_DEV_UNCONNECTED:
next_event (dev, GADGETFS_SUSPEND);
ep0_readable (dev);
- /* FALLTHROUGH */
+ fallthrough;
default:
break;
}
diff --git a/drivers/usb/gadget/udc/dummy_hcd.c b/drivers/usb/gadget/udc/dummy_hcd.c
index 0eeaead5acea..f4ffd52010ce 100644
--- a/drivers/usb/gadget/udc/dummy_hcd.c
+++ b/drivers/usb/gadget/udc/dummy_hcd.c
@@ -567,12 +567,12 @@ static int dummy_enable(struct usb_ep *_ep,
if (max <= 1024)
break;
/* save a return statement */
- /* fall through */
+ fallthrough;
case USB_SPEED_FULL:
if (max <= 64)
break;
/* save a return statement */
- /* fall through */
+ fallthrough;
default:
if (max <= 8)
break;
@@ -590,7 +590,7 @@ static int dummy_enable(struct usb_ep *_ep,
if (max <= 1024)
break;
/* save a return statement */
- /* fall through */
+ fallthrough;
case USB_SPEED_FULL:
if (max <= 1023)
break;
@@ -1943,7 +1943,7 @@ static void dummy_timer(struct timer_list *t)
* this almost certainly polls too fast.
*/
limit = max(limit, periodic_bytes(dum, ep));
- /* FALLTHROUGH */
+ fallthrough;

default:
treat_control_like_bulk:
@@ -2252,7 +2252,7 @@ static int dummy_hub_control(
"supported for USB 2.0 roothub\n");
goto error;
}
- /* FALLS THROUGH */
+ fallthrough;
case USB_PORT_FEAT_RESET:
/* if it's already enabled, disable */
if (hcd->speed == HCD_USB3) {
@@ -2276,7 +2276,7 @@ static int dummy_hub_control(
* interval? Is it still 50msec as for HS?
*/
dum_hcd->re_timeout = jiffies + msecs_to_jiffies(50);
- /* FALLS THROUGH */
+ fallthrough;
default:
if (hcd->speed == HCD_USB3) {
if ((dum_hcd->port_status &
diff --git a/drivers/usb/gadget/udc/goku_udc.c b/drivers/usb/gadget/udc/goku_udc.c
index 91dcb1995c27..25c1d6ab5adb 100644
--- a/drivers/usb/gadget/udc/goku_udc.c
+++ b/drivers/usb/gadget/udc/goku_udc.c
@@ -125,11 +125,14 @@ goku_ep_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
max = get_unaligned_le16(&desc->wMaxPacketSize);
switch (max) {
case 64:
- mode++; /* fall through */
+ mode++;
+ fallthrough;
case 32:
- mode++; /* fall through */
+ mode++;
+ fallthrough;
case 16:
- mode++; /* fall through */
+ mode++;
+ fallthrough;
case 8:
mode <<= 3;
break;
diff --git a/drivers/usb/gadget/udc/omap_udc.c b/drivers/usb/gadget/udc/omap_udc.c
index 4139da885651..494da00398d7 100644
--- a/drivers/usb/gadget/udc/omap_udc.c
+++ b/drivers/usb/gadget/udc/omap_udc.c
@@ -2831,7 +2831,7 @@ static int omap_udc_probe(struct platform_device *pdev)
type = "integrated";
break;
}
- /* FALL THROUGH */
+ fallthrough;
case 3:
case 11:
case 16:
@@ -2848,7 +2848,7 @@ static int omap_udc_probe(struct platform_device *pdev)
case 14: /* transceiverless */
if (cpu_is_omap1710())
goto bad_on_1710;
- /* FALL THROUGH */
+ fallthrough;
case 13:
case 15:
type = "no";
diff --git a/drivers/usb/gadget/udc/s3c2410_udc.c b/drivers/usb/gadget/udc/s3c2410_udc.c
index 80002d97b59d..bc2e8eb737c3 100644
--- a/drivers/usb/gadget/udc/s3c2410_udc.c
+++ b/drivers/usb/gadget/udc/s3c2410_udc.c
@@ -308,7 +308,7 @@ static int s3c2410_udc_write_fifo(struct s3c2410_ep *ep,
switch (idx) {
default:
idx = 0;
- /* fall through */
+ fallthrough;
case 0:
fifo_reg = S3C2410_UDC_EP0_FIFO_REG;
break;
@@ -413,7 +413,7 @@ static int s3c2410_udc_read_fifo(struct s3c2410_ep *ep,
switch (idx) {
default:
idx = 0;
- /* fall through */
+ fallthrough;
case 0:
fifo_reg = S3C2410_UDC_EP0_FIFO_REG;
break;
diff --git a/drivers/usb/gadget/udc/tegra-xudc.c b/drivers/usb/gadget/udc/tegra-xudc.c
index bbe1a04686da..404f77806c6a 100644
--- a/drivers/usb/gadget/udc/tegra-xudc.c
+++ b/drivers/usb/gadget/udc/tegra-xudc.c
@@ -2742,7 +2742,7 @@ static void tegra_xudc_handle_transfer_event(struct tegra_xudc *xudc,
ep_wait_for_stopped(xudc, ep_index);
ep->enq_ptr = ep->deq_ptr;
tegra_xudc_ep_nuke(ep, -EIO);
- /* FALLTHROUGH */
+ fallthrough;
case TRB_CMPL_CODE_STREAM_NUMP_ERROR:
case TRB_CMPL_CODE_CTRL_DIR_ERR:
case TRB_CMPL_CODE_INVALID_STREAM_TYPE_ERR:

Next message: Randy Dunlap: "Re: linux-next: Tree for Jul 7 (scsi/lpfc/lpfc_init.c)"
Previous message: Sergey Organov: "Re: [PATCH 3/5] net: fec: initialize clock with 0 rather than current kernel time"
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