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Another candidate that didn't use copyin/copyout for user<->kernel

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transfers.

MFC after:	1 month
This commit is contained in:
Joerg Wunsch 2004-05-16 21:19:59 +00:00
parent add37e1e86
commit 69271da461
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=129291
1 changed files with 23 additions and 3 deletions
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26
sys/dev/iicbus/iic.c
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@ -29,6 +29,7 @@
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <sys/conf.h>
@ -246,6 +247,7 @@ iicioctl(dev_t dev, u_long cmd, caddr_t data, int flags, struct thread *td)
device_t parent = device_get_parent(iicdev);
struct iiccmd *s = (struct iiccmd *)data;
int error, count;
char *buf = NULL;
if (!sc)
return (EINVAL);
@ -278,19 +280,37 @@ iicioctl(dev_t dev, u_long cmd, caddr_t data, int flags, struct thread *td)
break;
case I2CWRITE:
error = iicbus_write(parent, s->buf, s->count, &count, 10);
if (s->count <= 0) {
error = EINVAL;
break;
}
buf = malloc((unsigned long)s->count, M_TEMP, M_WAITOK);
error = copyin(s->buf, buf, s->count);
if (error)
break;
error = iicbus_write(parent, buf, s->count, &count, 10);
break;
case I2CREAD:
error = iicbus_read(parent, s->buf, s->count, &count, s->last, 10);
if (s->count <= 0) {
error = EINVAL;
break;
}
buf = malloc((unsigned long)s->count, M_TEMP, M_WAITOK);
error = iicbus_read(parent, buf, s->count, &count, s->last, 10);
if (error)
break;
error = copyout(buf, s->buf, s->count);
break;
default:
error = ENODEV;
error = ENOTTY;
}
iicbus_release_bus(device_get_parent(iicdev), iicdev);
if (buf != NULL)
free(buf, M_TEMP);
return (error);
}