mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-30 02:29:01 +00:00
44 lines
1.7 KiB
Diff
44 lines
1.7 KiB
Diff
|
From 97b384a6321493008599f5c68e7c610e377cb8e6 Mon Sep 17 00:00:00 2001
|
||
|
|
From: Jonathan Bell <jonathan@raspberrypi.com>
|
||
|
|
Date: Wed, 26 Oct 2022 17:46:44 +0100
|
||
|
|
Subject: [PATCH 0393/1085] drivers: dwc_otg: stop GCC from patching FIQ
|
||
|
|
functions
|
||
|
|
|
||
|
|
Configuring GCC to use task stack protector canaries means it will
|
||
|
|
insert calls to check functions in FIQ code. This is bad, as a) the
|
||
|
|
FIQ's stack is banked and b) the failure invokes __stack_chk_fail which
|
||
|
|
eventually tries to call printk(). Printing to the console inside the
|
||
|
|
FIQ is generally fatal.
|
||
|
|
|
||
|
|
Add CFLAGS to stop this happening in FIQ code.
|
||
|
|
|
||
|
|
Also catch one function where notrace wasn't specified.
|
||
|
|
|
||
|
|
Signed-off-by: Jonathan Bell <jonathan@raspberrypi.com>
|
||
|
|
---
|
||
|
|
drivers/usb/host/dwc_otg/Makefile | 1 +
|
||
|
|
drivers/usb/host/dwc_otg/dwc_otg_fiq_fsm.c | 2 +-
|
||
|
|
2 files changed, 2 insertions(+), 1 deletion(-)
|
||
|
|
|
||
|
|
--- a/drivers/usb/host/dwc_otg/Makefile
|
||
|
|
+++ b/drivers/usb/host/dwc_otg/Makefile
|
||
|
|
@@ -28,6 +28,7 @@ ccflags-y += -DDWC_LINUX
|
||
|
|
ccflags-y += $(CFI)
|
||
|
|
ccflags-y += $(BUS_INTERFACE)
|
||
|
|
#ccflags-y += -DDWC_DEV_SRPCAP
|
||
|
|
+CFLAGS_dwc_otg_fiq_fsm.o += -fno-stack-protector
|
||
|
|
|
||
|
|
obj-$(CONFIG_USB_DWCOTG) += dwc_otg.o
|
||
|
|
|
||
|
|
--- a/drivers/usb/host/dwc_otg/dwc_otg_fiq_fsm.c
|
||
|
|
+++ b/drivers/usb/host/dwc_otg/dwc_otg_fiq_fsm.c
|
||
|
|
@@ -142,7 +142,7 @@ inline void fiq_fsm_spin_unlock(fiq_lock
|
||
|
|
* fiq_fsm_restart_channel() - Poke channel enable bit for a split transaction
|
||
|
|
* @channel: channel to re-enable
|
||
|
|
*/
|
||
|
|
-static void fiq_fsm_restart_channel(struct fiq_state *st, int n, int force)
|
||
|
|
+static void notrace fiq_fsm_restart_channel(struct fiq_state *st, int n, int force)
|
||
|
|
{
|
||
|
|
hcchar_data_t hcchar = { .d32 = FIQ_READ(st->dwc_regs_base + HC_START + (HC_OFFSET * n) + HCCHAR) };
|
||
|
|
|