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wct4xxp: Move bottom half processing from tasklet to workqueue.

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I am primarily making this change in order that the oct612x API can use a mutex as
a synchronization primitive. Mutexes can only be aquired in process context and
the wct4xxp driver calls the Oct61000InterruptServiceRoutine (which grabs a
serialization object) when tone detection is enabled.

Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
This commit is contained in:
Shaun Ruffell 2014-06-20 12:02:49 -05:00 committed by Russ Meyerriecks
parent a3578ca156
commit b4941f35ad
2 changed files with 23 additions and 15 deletions
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31
drivers/dahdi/wct4xxp/base.c
View File

@ -371,9 +371,14 @@ struct t4 {
dma_addr_t writedma;
void __iomem *membase; /* Base address of card */
/* Flags for our bottom half */
#define T4_CHECK_VPM 0
#define T4_LOADING_FW 1
#define T4_STOP_DMA 2
#define T4_CHECK_TIMING 3
#define T4_CHANGE_LATENCY 4
#define T4_IGNORE_LATENCY 5
unsigned long checkflag;
struct tasklet_struct t4_tlet;
struct work_struct bh_work;
/* Latency related additions */
unsigned char rxident;
unsigned char lastindex;
@ -549,8 +554,6 @@ static void t4_check_sigbits(struct t4 *wc, int span);
#define MAX_T4_CARDS 64
static void t4_isr_bh(unsigned long data);
static struct t4 *cards[MAX_T4_CARDS];
struct t8_firm_header {
@ -2116,6 +2119,8 @@ static void free_wc(struct t4 *wc)
{
unsigned int x, y;
flush_scheduled_work();
for (x = 0; x < ARRAY_SIZE(wc->tspans); x++) {
if (!wc->tspans[x])
continue;
@ -4056,9 +4061,15 @@ static void t4_increase_latency(struct t4 *wc, int newlatency)
}
static void t4_isr_bh(unsigned long data)
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 20)
static void t4_work_func(void *data)
{
struct t4 *wc = (struct t4 *)data;
struct t4 *wc = data;
#else
static void t4_work_func(struct work_struct *work)
{
struct t4 *wc = container_of(work, struct t4, bh_work);
#endif
if (test_bit(T4_CHANGE_LATENCY, &wc->checkflag)) {
if (wc->needed_latency != wc->numbufs) {
@ -4265,7 +4276,7 @@ static irqreturn_t _t4_interrupt_gen2(int irq, void *dev_id)
out:
if (unlikely(test_bit(T4_CHANGE_LATENCY, &wc->checkflag) || test_bit(T4_CHECK_VPM, &wc->checkflag)))
tasklet_schedule(&wc->t4_tlet);
schedule_work(&wc->bh_work);
#ifndef ENABLE_WORKQUEUES
__t4_pci_out(wc, WC_INTR, 0);
@ -5146,7 +5157,11 @@ static int __devinit t4_launch(struct t4 *wc)
&wc->ddev->spans);
}
tasklet_init(&wc->t4_tlet, t4_isr_bh, (unsigned long)wc);
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 20)
INIT_WORK(&wc->bh_work, t4_work_func, wc);
#else
INIT_WORK(&wc->bh_work, t4_work_func);
#endif
res = dahdi_register_device(wc->ddev, &wc->dev->dev);
if (res) {

7
drivers/dahdi/wct4xxp/wct4xxp.h
View File

@ -131,13 +131,6 @@ struct t4_reg {
unsigned int val;
};
#define T4_CHECK_VPM 0
#define T4_LOADING_FW 1
#define T4_STOP_DMA 2
#define T4_CHECK_TIMING 3
#define T4_CHANGE_LATENCY 4
#define T4_IGNORE_LATENCY 5
#define WCT4_GET_REGS _IOW(DAHDI_CODE, 60, struct t4_regs)
#define WCT4_GET_REG _IOW(DAHDI_CODE, 61, struct t4_reg)
#define WCT4_SET_REG _IOW(DAHDI_CODE, 62, struct t4_reg)