/*
* Wireless Host Controller (WHC) interrupt handling.
*
* Copyright (C) 2007 Cambridge Silicon Radio Ltd.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version
* 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see .
*/
#include
#include
#include "../../wusbcore/wusbhc.h"
#include "whcd.h"
static void transfer_done(struct whc *whc)
{
queue_work(whc->workqueue, &whc->async_work);
queue_work(whc->workqueue, &whc->periodic_work);
}
irqreturn_t whc_int_handler(struct usb_hcd *hcd)
{
struct wusbhc *wusbhc = usb_hcd_to_wusbhc(hcd);
struct whc *whc = wusbhc_to_whc(wusbhc);
u32 sts;
sts = le_readl(whc->base + WUSBSTS);
if (!(sts & WUSBSTS_INT_MASK))
return IRQ_NONE;
le_writel(sts & WUSBSTS_INT_MASK, whc->base + WUSBSTS);
if (sts & WUSBSTS_GEN_CMD_DONE)
wake_up(&whc->cmd_wq);
if (sts & WUSBSTS_HOST_ERR)
dev_err(&whc->umc->dev, "FIXME: host system error\n");
if (sts & WUSBSTS_ASYNC_SCHED_SYNCED)
wake_up(&whc->async_list_wq);
if (sts & WUSBSTS_PERIODIC_SCHED_SYNCED)
wake_up(&whc->periodic_list_wq);
if (sts & WUSBSTS_DNTS_INT)
queue_work(whc->workqueue, &whc->dn_work);
/*
* A transfer completed (see [WHCI] section 4.7.1.2 for when
* this occurs).
*/
if (sts & (WUSBSTS_INT | WUSBSTS_ERR_INT))
transfer_done(whc);
return IRQ_HANDLED;
}
static int process_dn_buf(struct whc *whc)
{
struct wusbhc *wusbhc = &whc->wusbhc;
struct dn_buf_entry *dn;
int processed = 0;
for (dn = whc->dn_buf; dn < whc->dn_buf + WHC_N_DN_ENTRIES; dn++) {
if (dn->status & WHC_DN_STATUS_VALID) {
wusbhc_handle_dn(wusbhc, dn->src_addr,
(struct wusb_dn_hdr *)dn->dn_data,
dn->msg_size);
dn->status &= ~WHC_DN_STATUS_VALID;
processed++;
}
}
return processed;
}
void whc_dn_work(struct work_struct *work)
{
struct whc *whc = container_of(work, struct whc, dn_work);
int processed;
do {
processed = process_dn_buf(whc);
} while (processed);
}
n' name='h' value='nds-private-remove'/>
PCI/MSI: Don't apply affinity if there aren't enough vectors left
Bart reported a problem wіth an out of bounds access in the low-level IRQ
affinity code, which we root caused to the qla2xxx driver assigning all its
MSI-X vectors to the pre and post vectors, and not having any left for the
actually spread IRQs.
Fix this issue by not asking for affinity assignment when there are no
vectors to assign left.
Fixes: 402723ad5c62 ("PCI/MSI: Provide pci_alloc_irq_vectors_affinity()")
Link: https://lkml.kernel.org/r/1485359225.3093.3.camel@sandisk.com
Reported-by: Bart Van Assche <bart.vanassche@sandisk.com>
Tested-by: Bart Van Assche <bart.vanassche@sandisk.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'sound/soc/fsl/phycore-ac97.c')