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devgpio: make reading ctl file return 0 bytes

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This commit is contained in:
cinap_lenrek 2022-02-05 01:25:28 +00:00
parent 1290c534be
commit dc72530159
1 changed files with 2 additions and 2 deletions
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4
sys/src/9/bcm/devgpio.c
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@ -448,6 +448,7 @@ gpioread(Chan *c, void *va, long n, vlong off)
n = 1;
break;
case Qctl:
n = 0;
break;
case Qevent:
if(off >= 4)
@ -555,10 +556,10 @@ gpiowrite(Chan *c, void *va, long n, vlong)
break;
case CMfunc:
pin = getpin(cb->f[2]);
arg = cb->f[1];
if(pin == -1) {
error(Ebadctl);
}
arg = cb->f[1];
for(i = 0; i < nelem(funcname); i++)
{
if(strncmp(funcname[i], arg, strlen(funcname[i])) == 0)
@ -588,7 +589,6 @@ gpiowrite(Chan *c, void *va, long n, vlong)
if(pin == -1) {
error(Ebadctl);
}
arg = cb->f[1];
for(i = 0; i < nelem(evtypename); i++)
{