diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-4.19/950-0365-dwc_otg-fix-locking-around-dequeueing-and-killing-UR.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-4.19/950-0365-dwc_otg-fix-locking-around-dequeueing-and-killing-UR.patch | 63 |
1 files changed, 0 insertions, 63 deletions
diff --git a/target/linux/bcm27xx/patches-4.19/950-0365-dwc_otg-fix-locking-around-dequeueing-and-killing-UR.patch b/target/linux/bcm27xx/patches-4.19/950-0365-dwc_otg-fix-locking-around-dequeueing-and-killing-UR.patch deleted file mode 100644 index 53e2c98ce5..0000000000 --- a/target/linux/bcm27xx/patches-4.19/950-0365-dwc_otg-fix-locking-around-dequeueing-and-killing-UR.patch +++ /dev/null @@ -1,63 +0,0 @@ -From ea7ff2070d564858c445cfdbd883ea00927c0ada Mon Sep 17 00:00:00 2001 -From: P33M <p33m@github.com> -Date: Tue, 9 Apr 2019 16:40:48 +0100 -Subject: [PATCH] dwc_otg: fix locking around dequeueing and killing - URBs - -kill_urbs_in_qh_list() is practically only ever called with the fiq lock -already held, so don't spinlock twice in the case where we need to cancel -an isochronous transfer. - -Also fix up a case where the global interrupt register could be read with -the fiq lock not held. - -Fixes the deadlock seen in https://github.com/raspberrypi/linux/issues/2907 ---- - drivers/usb/host/dwc_otg/dwc_otg_cil_intr.c | 9 +++++++-- - drivers/usb/host/dwc_otg/dwc_otg_hcd.c | 4 ---- - 2 files changed, 7 insertions(+), 6 deletions(-) - ---- a/drivers/usb/host/dwc_otg/dwc_otg_cil_intr.c -+++ b/drivers/usb/host/dwc_otg/dwc_otg_cil_intr.c -@@ -1344,16 +1344,21 @@ static inline uint32_t dwc_otg_read_comm - */ - gintmsk_common.b.portintr = 1; - } -- gintsts.d32 = DWC_READ_REG32(&core_if->core_global_regs->gintsts); -- gintmsk.d32 = DWC_READ_REG32(&core_if->core_global_regs->gintmsk); - if(fiq_enable) { - local_fiq_disable(); -+ fiq_fsm_spin_lock(&hcd->fiq_state->lock); -+ gintsts.d32 = DWC_READ_REG32(&core_if->core_global_regs->gintsts); -+ gintmsk.d32 = DWC_READ_REG32(&core_if->core_global_regs->gintmsk); - /* Pull in the interrupts that the FIQ has masked */ - gintmsk.d32 |= ~(hcd->fiq_state->gintmsk_saved.d32); - gintmsk.d32 |= gintmsk_common.d32; - /* for the upstairs function to reenable - have to read it here in case FIQ triggers again */ - reenable_gintmsk->d32 = gintmsk.d32; -+ fiq_fsm_spin_unlock(&hcd->fiq_state->lock); - local_fiq_enable(); -+ } else { -+ gintsts.d32 = DWC_READ_REG32(&core_if->core_global_regs->gintsts); -+ gintmsk.d32 = DWC_READ_REG32(&core_if->core_global_regs->gintmsk); - } - - gahbcfg.d32 = DWC_READ_REG32(&core_if->core_global_regs->gahbcfg); ---- a/drivers/usb/host/dwc_otg/dwc_otg_hcd.c -+++ b/drivers/usb/host/dwc_otg/dwc_otg_hcd.c -@@ -195,15 +195,11 @@ static void kill_urbs_in_qh_list(dwc_otg - * but not yet been through the IRQ handler. - */ - if (fiq_fsm_enable && (hcd->fiq_state->channel[qh->channel->hc_num].fsm != FIQ_PASSTHROUGH)) { -- local_fiq_disable(); -- fiq_fsm_spin_lock(&hcd->fiq_state->lock); - qh->channel->halt_status = DWC_OTG_HC_XFER_URB_DEQUEUE; - qh->channel->halt_pending = 1; - if (hcd->fiq_state->channel[n].fsm == FIQ_HS_ISOC_TURBO || - hcd->fiq_state->channel[n].fsm == FIQ_HS_ISOC_SLEEPING) - hcd->fiq_state->channel[n].fsm = FIQ_HS_ISOC_ABORTED; -- fiq_fsm_spin_unlock(&hcd->fiq_state->lock); -- local_fiq_enable(); - } else { - dwc_otg_hc_halt(hcd->core_if, qh->channel, - DWC_OTG_HC_XFER_URB_DEQUEUE); |