diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.19/950-0295-usb-dwc_otg-Use-dma-allocation-for-mphi-dummy_send-b.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.19/950-0295-usb-dwc_otg-Use-dma-allocation-for-mphi-dummy_send-b.patch | 74 |
1 files changed, 0 insertions, 74 deletions
diff --git a/target/linux/brcm2708/patches-4.19/950-0295-usb-dwc_otg-Use-dma-allocation-for-mphi-dummy_send-b.patch b/target/linux/brcm2708/patches-4.19/950-0295-usb-dwc_otg-Use-dma-allocation-for-mphi-dummy_send-b.patch deleted file mode 100644 index edc9336804..0000000000 --- a/target/linux/brcm2708/patches-4.19/950-0295-usb-dwc_otg-Use-dma-allocation-for-mphi-dummy_send-b.patch +++ /dev/null @@ -1,74 +0,0 @@ -From f0d93c5098283f88ea1de3af152a190177da8f36 Mon Sep 17 00:00:00 2001 -From: Dave Stevenson <dave.stevenson@raspberrypi.org> -Date: Wed, 30 Jan 2019 17:47:51 +0000 -Subject: [PATCH] usb: dwc_otg: Use dma allocation for mphi dummy_send - buffer - -The FIQ driver used a kzalloc'ed buffer for dummy_send, -passing a kernel virtual address to the hardware block. -The buffer is only ever used for a dummy read, so it -should be harmless, but there is the chance that it will -cause exceptions. - -Use a dma allocation so that we have a genuine bus address, -and read from that. -Free the allocation when done for good measure. - -Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org> ---- - drivers/usb/host/dwc_otg/dwc_otg_fiq_fsm.c | 4 ++-- - drivers/usb/host/dwc_otg/dwc_otg_fiq_fsm.h | 1 + - drivers/usb/host/dwc_otg/dwc_otg_hcd.c | 5 ++++- - 3 files changed, 7 insertions(+), 3 deletions(-) - ---- a/drivers/usb/host/dwc_otg/dwc_otg_fiq_fsm.c -+++ b/drivers/usb/host/dwc_otg/dwc_otg_fiq_fsm.c -@@ -1347,7 +1347,7 @@ void notrace dwc_otg_fiq_fsm(struct fiq_ - /* We got an interrupt, didn't handle it. */ - if (kick_irq) { - state->mphi_int_count++; -- FIQ_WRITE(state->mphi_regs.outdda, (int) state->dummy_send); -+ FIQ_WRITE(state->mphi_regs.outdda, state->dummy_send_dma); - FIQ_WRITE(state->mphi_regs.outddb, (1<<29)); - - } -@@ -1408,7 +1408,7 @@ void notrace dwc_otg_fiq_nop(struct fiq_ - FIQ_WRITE(state->dwc_regs_base + GINTMSK, gintmsk.d32); - /* Force a clear before another dummy send */ - FIQ_WRITE(state->mphi_regs.intstat, (1<<29)); -- FIQ_WRITE(state->mphi_regs.outdda, (int) state->dummy_send); -+ FIQ_WRITE(state->mphi_regs.outdda, state->dummy_send_dma); - FIQ_WRITE(state->mphi_regs.outddb, (1<<29)); - - } ---- a/drivers/usb/host/dwc_otg/dwc_otg_fiq_fsm.h -+++ b/drivers/usb/host/dwc_otg/dwc_otg_fiq_fsm.h -@@ -352,6 +352,7 @@ struct fiq_state { - dma_addr_t dma_base; - struct fiq_dma_blob *fiq_dmab; - void *dummy_send; -+ dma_addr_t dummy_send_dma; - gintmsk_data_t gintmsk_saved; - haintmsk_data_t haintmsk_saved; - int mphi_int_count; ---- a/drivers/usb/host/dwc_otg/dwc_otg_hcd.c -+++ b/drivers/usb/host/dwc_otg/dwc_otg_hcd.c -@@ -929,6 +929,8 @@ static void dwc_otg_hcd_free(dwc_otg_hcd - DWC_TIMER_FREE(dwc_otg_hcd->conn_timer); - DWC_TASK_FREE(dwc_otg_hcd->reset_tasklet); - DWC_TASK_FREE(dwc_otg_hcd->completion_tasklet); -+ DWC_DMA_FREE(dev, 16, dwc_otg_hcd->fiq_state->dummy_send, -+ dwc_otg_hcd->fiq_state->dummy_send_dma); - DWC_FREE(dwc_otg_hcd->fiq_state); - - #ifdef DWC_DEV_SRPCAP -@@ -1021,7 +1023,8 @@ int dwc_otg_hcd_init(dwc_otg_hcd_t * hcd - for (i = 0; i < num_channels; i++) { - hcd->fiq_state->channel[i].fsm = FIQ_PASSTHROUGH; - } -- hcd->fiq_state->dummy_send = DWC_ALLOC_ATOMIC(16); -+ hcd->fiq_state->dummy_send = DWC_DMA_ALLOC_ATOMIC(dev, 16, -+ &hcd->fiq_state->dummy_send_dma); - - hcd->fiq_stack = DWC_ALLOC(sizeof(struct fiq_stack)); - if (!hcd->fiq_stack) { |