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usb-mtp: use bool to track MTPObject init status

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Stop setting nchildren to -1.  Use separate bool variable to track
whenever we've already fetched the child objects instead.

Also make nchildren unsigned.

Cc: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Gerd Hoffmann 2014-05-20 12:54:08 +02:00
parent f995523582
commit 36084d7e31
1 changed files with 8 additions and 6 deletions
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14
hw/usb/dev-mtp.c
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@ -109,7 +109,8 @@ struct MTPObject {
struct stat stat;
MTPObject *parent;
MTPObject **children;
int32_t nchildren;
uint32_t nchildren;
bool have_children;
QTAILQ_ENTRY(MTPObject) next;
};
@ -273,7 +274,6 @@ static MTPObject *usb_mtp_object_alloc(MTPState *s, uint32_t handle,
o->handle = handle;
o->parent = parent;
o->name = g_strdup(name);
o->nchildren = -1;
if (parent == NULL) {
o->path = g_strdup(name);
} else {
@ -340,7 +340,11 @@ static void usb_mtp_object_readdir(MTPState *s, MTPObject *o)
struct dirent *entry;
DIR *dir;
o->nchildren = 0;
if (o->have_children) {
return;
}
o->have_children = true;
dir = opendir(o->path);
if (!dir) {
return;
@ -789,9 +793,7 @@ static void usb_mtp_command(MTPState *s, MTPControl *c)
c->trans, 0, 0, 0);
return;
}
if (o->nchildren == -1) {
usb_mtp_object_readdir(s, o);
}
usb_mtp_object_readdir(s, o);
if (c->code == CMD_GET_NUM_OBJECTS) {
trace_usb_mtp_op_get_num_objects(s->dev.addr, o->handle, o->path);
nres = 1;