#include <linux/kernel.h>
#include <linux/string.h>
+#include <linux/err.h>
#include <linux/slab.h>
#include <linux/wait.h>
#include <linux/sched.h>
/*
* search available compressors for requested algorithm.
- * allocate new zcomp and initialize it. return NULL
- * if requested algorithm is not supported or in case
- * of init error
+ * allocate new zcomp and initialize it. return compressing
+ * backend pointer or ERR_PTR if things went bad. ERR_PTR(-EINVAL)
+ * if requested algorithm is not supported, ERR_PTR(-ENOMEM) in
+ * case of allocation error.
*/
struct zcomp *zcomp_create(const char *compress, int max_strm)
{
backend = find_backend(compress);
if (!backend)
- return NULL;
+ return ERR_PTR(-EINVAL);
comp = kzalloc(sizeof(struct zcomp), GFP_KERNEL);
if (!comp)
- return NULL;
+ return ERR_PTR(-ENOMEM);
comp->backend = backend;
if (max_strm > 1)
zcomp_strm_single_create(comp);
if (!comp->stream) {
kfree(comp);
- return NULL;
+ return ERR_PTR(-ENOMEM);
}
return comp;
}