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ipm: rework isr to service one set of requests at a time

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Change-Id: I50604748cee1aeb43dc764f426d3a17fcc943cbe
Signed-off-by: Dirk Brandewie <dirk.j.brandewie@intel.com>
This commit is contained in:
Dirk Brandewie 2015-12-18 12:10:06 -08:00 • committed by Anas Nashif
commit 0551ee0708
2 changed files with 14 additions and 21 deletions
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31
drivers/ipm/ipm_quark_se.c
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@ -78,29 +78,22 @@ static void set_channel_irq_state(int channel, int enable)
void quark_se_ipm_isr(void *param)
{
int channel;
int sts;
int sts, bit;
struct device *d;
ARG_UNUSED(param);
/* Find out which mailbox channel has an incoming message */
while (1) {
sts = quark_se_ipm_sts_get();
/* FIXME: for every message sent, there are two interrupts
* generated, the second has empty sts. Probably an IRQ
* triggering issue
*/
if (!sts) {
break;
sts = quark_se_ipm_sts_get();
do {
bit = find_msb_set(sts) - 1 ;
channel = bit / 2;
if (sts) {
d = device_by_channel[channel];
if (d) {
mailbox_handle(d);
}
sts &= ~(0x1 << (bit));
}
channel = (find_msb_set(sts) - 1) / 2;
d = device_by_channel[channel];
if (d) {
mailbox_handle(d);
}
}
} while (sts);
}