| Message ID | 20201111014716.260633-1-ndesaulniers@google.com |
|---|---|
| State | New |
| Headers | show |
| Series | usb: fix a few cases of -Wfallthrough | expand |
On Tue, Nov 10, 2020 at 05:47:14PM -0800, Nick Desaulniers wrote: > The "fallthrough" pseudo-keyword was added as a portable way to denote > intentional fallthrough. Clang will still warn on cases where there is a > fallthrough to an immediate break. Add explicit breaks for those cases. > > Signed-off-by: Nick Desaulniers <ndesaulniers@google.com> Aside from a minor nit/question below: Reviewed-by: Nathan Chancellor <natechancellor@gmail.com> > --- > drivers/usb/core/config.c | 1 + > drivers/usb/host/ehci-hcd.c | 2 +- > drivers/usb/host/ohci-hcd.c | 2 +- > drivers/usb/host/ohci-hub.c | 1 + > drivers/usb/host/xhci-ring.c | 2 ++ > 5 files changed, 6 insertions(+), 2 deletions(-) > > diff --git a/drivers/usb/core/config.c b/drivers/usb/core/config.c > index 562a730befda..b199eb65f378 100644 > --- a/drivers/usb/core/config.c > +++ b/drivers/usb/core/config.c > @@ -1076,6 +1076,7 @@ int usb_get_bos_descriptor(struct usb_device *dev) > case USB_PTM_CAP_TYPE: > dev->bos->ptm_cap = > (struct usb_ptm_cap_descriptor *)buffer; > + break; > default: > break; > } > diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c > index 3575b7201881..e358ae17d51e 100644 > --- a/drivers/usb/host/ehci-hcd.c > +++ b/drivers/usb/host/ehci-hcd.c > @@ -867,7 +867,7 @@ static int ehci_urb_enqueue ( > */ > if (urb->transfer_buffer_length > (16 * 1024)) > return -EMSGSIZE; > - /* FALLTHROUGH */ > + fallthrough; This is fixing the same kind of warnings but it is not called out in the commit message. Maybe this hunk and the next hunk should be in a separate patch? No strong preference either way. > /* case PIPE_BULK: */ > default: > if (!qh_urb_transaction (ehci, urb, &qtd_list, mem_flags)) > diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c > index 73e13e7c2b46..1f5e69314a17 100644 > --- a/drivers/usb/host/ohci-hcd.c > +++ b/drivers/usb/host/ohci-hcd.c > @@ -171,7 +171,7 @@ static int ohci_urb_enqueue ( > > /* 1 TD for setup, 1 for ACK, plus ... */ > size = 2; > - /* FALLTHROUGH */ > + fallthrough; > // case PIPE_INTERRUPT: > // case PIPE_BULK: > default: > diff --git a/drivers/usb/host/ohci-hub.c b/drivers/usb/host/ohci-hub.c > index 44504c1751e0..f474f2f9c1e4 100644 > --- a/drivers/usb/host/ohci-hub.c > +++ b/drivers/usb/host/ohci-hub.c > @@ -692,6 +692,7 @@ int ohci_hub_control( > case C_HUB_OVER_CURRENT: > ohci_writel (ohci, RH_HS_OCIC, > &ohci->regs->roothub.status); > + break; > case C_HUB_LOCAL_POWER: > break; > default: > diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c > index 167dae117f73..eac43a7b7f23 100644 > --- a/drivers/usb/host/xhci-ring.c > +++ b/drivers/usb/host/xhci-ring.c > @@ -2418,6 +2418,7 @@ static int handle_tx_event(struct xhci_hcd *xhci, > xhci_warn_ratelimited(xhci, > "WARN Successful completion on short TX for slot %u ep %u: needs XHCI_TRUST_TX_LENGTH quirk?\n", > slot_id, ep_index); > + break; > case COMP_SHORT_PACKET: > break; > /* Completion codes for endpoint stopped state */ > @@ -2962,6 +2963,7 @@ static int prepare_ring(struct xhci_hcd *xhci, struct xhci_ring *ep_ring, > return -EINVAL; > case EP_STATE_HALTED: > xhci_dbg(xhci, "WARN halted endpoint, queueing URB anyway.\n"); > + break; > case EP_STATE_STOPPED: > case EP_STATE_RUNNING: > break; > -- > 2.29.2.222.g5d2a92d10f8-goog >
diff --git a/drivers/usb/core/config.c b/drivers/usb/core/config.c index 562a730befda..b199eb65f378 100644 --- a/drivers/usb/core/config.c +++ b/drivers/usb/core/config.c @@ -1076,6 +1076,7 @@ int usb_get_bos_descriptor(struct usb_device *dev) case USB_PTM_CAP_TYPE: dev->bos->ptm_cap = (struct usb_ptm_cap_descriptor *)buffer; + break; default: break; } diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c index 3575b7201881..e358ae17d51e 100644 --- a/drivers/usb/host/ehci-hcd.c +++ b/drivers/usb/host/ehci-hcd.c @@ -867,7 +867,7 @@ static int ehci_urb_enqueue ( */ if (urb->transfer_buffer_length > (16 * 1024)) return -EMSGSIZE; - /* FALLTHROUGH */ + fallthrough; /* case PIPE_BULK: */ default: if (!qh_urb_transaction (ehci, urb, &qtd_list, mem_flags)) diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c index 73e13e7c2b46..1f5e69314a17 100644 --- a/drivers/usb/host/ohci-hcd.c +++ b/drivers/usb/host/ohci-hcd.c @@ -171,7 +171,7 @@ static int ohci_urb_enqueue ( /* 1 TD for setup, 1 for ACK, plus ... */ size = 2; - /* FALLTHROUGH */ + fallthrough; // case PIPE_INTERRUPT: // case PIPE_BULK: default: diff --git a/drivers/usb/host/ohci-hub.c b/drivers/usb/host/ohci-hub.c index 44504c1751e0..f474f2f9c1e4 100644 --- a/drivers/usb/host/ohci-hub.c +++ b/drivers/usb/host/ohci-hub.c @@ -692,6 +692,7 @@ int ohci_hub_control( case C_HUB_OVER_CURRENT: ohci_writel (ohci, RH_HS_OCIC, &ohci->regs->roothub.status); + break; case C_HUB_LOCAL_POWER: break; default: diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c index 167dae117f73..eac43a7b7f23 100644 --- a/drivers/usb/host/xhci-ring.c +++ b/drivers/usb/host/xhci-ring.c @@ -2418,6 +2418,7 @@ static int handle_tx_event(struct xhci_hcd *xhci, xhci_warn_ratelimited(xhci, "WARN Successful completion on short TX for slot %u ep %u: needs XHCI_TRUST_TX_LENGTH quirk?\n", slot_id, ep_index); + break; case COMP_SHORT_PACKET: break; /* Completion codes for endpoint stopped state */ @@ -2962,6 +2963,7 @@ static int prepare_ring(struct xhci_hcd *xhci, struct xhci_ring *ep_ring, return -EINVAL; case EP_STATE_HALTED: xhci_dbg(xhci, "WARN halted endpoint, queueing URB anyway.\n"); + break; case EP_STATE_STOPPED: case EP_STATE_RUNNING: break;
The "fallthrough" pseudo-keyword was added as a portable way to denote intentional fallthrough. Clang will still warn on cases where there is a fallthrough to an immediate break. Add explicit breaks for those cases. Signed-off-by: Nick Desaulniers <ndesaulniers@google.com> --- drivers/usb/core/config.c | 1 + drivers/usb/host/ehci-hcd.c | 2 +- drivers/usb/host/ohci-hcd.c | 2 +- drivers/usb/host/ohci-hub.c | 1 + drivers/usb/host/xhci-ring.c | 2 ++ 5 files changed, 6 insertions(+), 2 deletions(-) -- 2.29.2.222.g5d2a92d10f8-goog