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When a kernel has DEVICE_POLLING turned on but no drivers have

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the capability do not try to take the mutex at all.

Replaces misbegotten attempt from reverted commit 281276

Pointed out by: glebius
Sponsored by: Rubicon Communications (Netgate)
Differential Revision:	https://reviews.freebsd.org/D2262
This commit is contained in:
George V. Neville-Neil 2015-04-14 14:22:34 +00:00
parent 3f06facc8a
commit 63bf240482
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=281528
1 changed files with 6 additions and 0 deletions
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6
sys/kern/kern_poll.c
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@ -367,6 +367,9 @@ netisr_pollmore()
struct timeval t;
int kern_load;
if (poll_handlers == 0)
return;
mtx_lock(&poll_mtx);
if (!netisr_pollmore_scheduled) {
mtx_unlock(&poll_mtx);
@ -424,6 +427,9 @@ netisr_poll(void)
int i, cycles;
enum poll_cmd arg = POLL_ONLY;
if (poll_handlers == 0)
return;
mtx_lock(&poll_mtx);
if (!netisr_poll_scheduled) {
mtx_unlock(&poll_mtx);