usb: dwc3: ensure consistent types for dwc3_flush_cache

The dwc3_flush_cache() call was declared and used inconsistently:
 * The declaration assumed 'int' for addresses (a potential issue
   when running in a LP64 memory model).
 * The invocation cast the address to 'long'.

This change ensures that both the declaration and usage of this
function consistently uses 'uintptr_t' for correct behaviour even
when the allocated buffers (to be flushed) reside outside of the
lower 32bits of memory.

Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>

diff --git a/drivers/usb/dwc3/ep0.c b/drivers/usb/dwc3/ep0.c
index 12b133f..e61d980 100644 (file)
--- a/drivers/usb/dwc3/ep0.c
+++ b/drivers/usb/dwc3/ep0.c
@@ -81,8 +81,8 @@ static int dwc3_ep0_start_trans(struct dwc3 *dwc, u8 epnum, dma_addr_t buf_dma,
                trb->ctrl |= (DWC3_TRB_CTRL_IOC
                                | DWC3_TRB_CTRL_LST);
 
-       dwc3_flush_cache((long)buf_dma, len);
-       dwc3_flush_cache((long)trb, sizeof(*trb));
+       dwc3_flush_cache((uintptr_t)buf_dma, len);
+       dwc3_flush_cache((uintptr_t)trb, sizeof(*trb));
 
        if (chain)
                return 0;
@@ -790,7 +790,7 @@ static void dwc3_ep0_complete_data(struct dwc3 *dwc,
        if (!r)
                return;
 
-       dwc3_flush_cache((long)trb, sizeof(*trb));
+       dwc3_flush_cache((uintptr_t)trb, sizeof(*trb));
 
        status = DWC3_TRB_SIZE_TRBSTS(trb->size);
        if (status == DWC3_TRBSTS_SETUP_PENDING) {
@@ -821,7 +821,7 @@ static void dwc3_ep0_complete_data(struct dwc3 *dwc,
                        ur->actual += transferred;
 
                        trb++;
-                       dwc3_flush_cache((long)trb, sizeof(*trb));
+                       dwc3_flush_cache((uintptr_t)trb, sizeof(*trb));
                        length = trb->size & DWC3_TRB_SIZE_MASK;
 
                        ep0->free_slot = 0;
@@ -831,7 +831,7 @@ static void dwc3_ep0_complete_data(struct dwc3 *dwc,
                                        maxp);
                transferred = min_t(u32, ur->length - transferred,
                                    transfer_size - length);
-               dwc3_flush_cache((long)dwc->ep0_bounce, DWC3_EP0_BOUNCE_SIZE);
+               dwc3_flush_cache((uintptr_t)dwc->ep0_bounce, DWC3_EP0_BOUNCE_SIZE);
                memcpy(buf, dwc->ep0_bounce, transferred);
        } else {
                transferred = ur->length - length;

diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 1156662..8c53cc0 100644 (file)
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -244,7 +244,7 @@ void dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req,
 
        list_del(&req->list);
        req->trb = NULL;
-       dwc3_flush_cache((long)req->request.dma, req->request.length);
+       dwc3_flush_cache((uintptr_t)req->request.dma, req->request.length);
 
        if (req->request.status == -EINPROGRESS)
                req->request.status = status;
@@ -771,8 +771,8 @@ static void dwc3_prepare_one_trb(struct dwc3_ep *dep,
 
        trb->ctrl |= DWC3_TRB_CTRL_HWO;
 
-       dwc3_flush_cache((long)dma, length);
-       dwc3_flush_cache((long)trb, sizeof(*trb));
+       dwc3_flush_cache((uintptr_t)dma, length);
+       dwc3_flush_cache((uintptr_t)trb, sizeof(*trb));
 }
 
 /*
@@ -1769,7 +1769,7 @@ static int dwc3_cleanup_done_reqs(struct dwc3 *dwc, struct dwc3_ep *dep,
        slot %= DWC3_TRB_NUM;
        trb = &dep->trb_pool[slot];
 
-       dwc3_flush_cache((long)trb, sizeof(*trb));
+       dwc3_flush_cache((uintptr_t)trb, sizeof(*trb));
        __dwc3_cleanup_done_trbs(dwc, dep, req, trb, event, status);
        dwc3_gadget_giveback(dep, req, status);
 
@@ -2670,7 +2670,7 @@ void dwc3_gadget_uboot_handle_interrupt(struct dwc3 *dwc)
 
                for (i = 0; i < dwc->num_event_buffers; i++) {
                        evt = dwc->ev_buffs[i];
-                       dwc3_flush_cache((long)evt->buf, evt->length);
+                       dwc3_flush_cache((uintptr_t)evt->buf, evt->length);
                }
 
                dwc3_thread_interrupt(0, dwc);

diff --git a/drivers/usb/dwc3/io.h b/drivers/usb/dwc3/io.h
index 0d9fa22..810980f 100644 (file)
--- a/drivers/usb/dwc3/io.h
+++ b/drivers/usb/dwc3/io.h
@@ -48,7 +48,7 @@ static inline void dwc3_writel(void __iomem *base, u32 offset, u32 value)
        writel(value, base + offs);
 }
 
-static inline void dwc3_flush_cache(int addr, int length)
+static inline void dwc3_flush_cache(uintptr_t addr, int length)
 {
        flush_dcache_range(addr, addr + ROUND(length, CACHELINE_SIZE));
 }