d81eeacd48
uclass_find_first_device() may return NULL if no device for the uclass exists. Handle this case gracefully. Addresses-Coverity: CID 356244 ("Null pointer dereferences (FORWARD_NULL)") Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com> Reviewed-by: Simon Glass <sjg@chromium.org>
120 lines
2.4 KiB
C
120 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Verified Boot for Embedded (VBE) access functions
|
|
*
|
|
* Copyright 2022 Google LLC
|
|
* Written by Simon Glass <sjg@chromium.org>
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <bootmeth.h>
|
|
#include <bootstd.h>
|
|
#include <dm.h>
|
|
#include <image.h>
|
|
#include <vbe.h>
|
|
#include <dm/uclass-internal.h>
|
|
|
|
/**
|
|
* is_vbe() - Check if a device is a VBE method
|
|
*
|
|
* @dev: Device to check
|
|
* @return true if this is a VBE bootmth device, else false
|
|
*/
|
|
static bool is_vbe(struct udevice *dev)
|
|
{
|
|
return !strncmp("vbe", dev->driver->name, 3);
|
|
}
|
|
|
|
int vbe_find_next_device(struct udevice **devp)
|
|
{
|
|
for (uclass_find_next_device(devp);
|
|
*devp;
|
|
uclass_find_next_device(devp)) {
|
|
if (is_vbe(*devp))
|
|
return 0;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int vbe_find_first_device(struct udevice **devp)
|
|
{
|
|
uclass_find_first_device(UCLASS_BOOTMETH, devp);
|
|
if (!*devp || is_vbe(*devp))
|
|
return 0;
|
|
|
|
return vbe_find_next_device(devp);
|
|
}
|
|
|
|
int vbe_list(void)
|
|
{
|
|
struct bootstd_priv *std;
|
|
struct udevice *dev;
|
|
int ret;
|
|
|
|
ret = bootstd_get_priv(&std);
|
|
if (ret)
|
|
return ret;
|
|
|
|
printf("%3s %-3s %-15s %-15s %s\n", "#", "Sel", "Device", "Driver",
|
|
"Description");
|
|
printf("%3s %-3s %-15s %-15s %s\n", "---", "---", "--------------",
|
|
"--------------", "-----------");
|
|
for (ret = vbe_find_first_device(&dev); dev;
|
|
ret = vbe_find_next_device(&dev)) {
|
|
const struct bootmeth_uc_plat *plat = dev_get_uclass_plat(dev);
|
|
|
|
printf("%3d %-3s %-15s %-15s %s\n", dev_seq(dev),
|
|
std->vbe_bootmeth == dev ? "*" : "", dev->name,
|
|
dev->driver->name, plat->desc);
|
|
}
|
|
printf("%3s %-3s %-15s %-15s %s\n", "---", "---", "--------------",
|
|
"--------------", "-----------");
|
|
|
|
return 0;
|
|
}
|
|
|
|
int vbe_select(struct udevice *dev)
|
|
{
|
|
struct bootstd_priv *std;
|
|
int ret;
|
|
|
|
ret = bootstd_get_priv(&std);
|
|
if (ret)
|
|
return ret;
|
|
std->vbe_bootmeth = dev;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int vbe_find_by_any(const char *name, struct udevice **devp)
|
|
{
|
|
struct udevice *dev;
|
|
int ret, seq;
|
|
char *endp;
|
|
|
|
seq = simple_strtol(name, &endp, 16);
|
|
|
|
/* Select by name */
|
|
if (*endp) {
|
|
ret = uclass_get_device_by_name(UCLASS_BOOTMETH, name, &dev);
|
|
if (ret) {
|
|
printf("Cannot probe VBE bootmeth '%s' (err=%d)\n", name,
|
|
ret);
|
|
return ret;
|
|
}
|
|
|
|
/* select by number */
|
|
} else {
|
|
ret = uclass_get_device_by_seq(UCLASS_BOOTMETH, seq, &dev);
|
|
if (ret) {
|
|
printf("Cannot find '%s' (err=%d)\n", name, ret);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
*devp = dev;
|
|
|
|
return 0;
|
|
}
|