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USB storage count

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Here's another USB storage patch. Currently U-Boot handles storage
devices #0 - #4 as valid devices, even if there is none connected. This
patch fixes usb_stor_get_dev() to check detected device count instead
of MAX-define.

This is very important for ill behaving devices. usb_dev_desc[] can be
partially initialized if device probe fails.

After fixing get_dev() it was easy to fix "usb part" etc commands.
Previously it outputed "Unknown partition table" five times, now it's
"no USB devices available".

Signed-off-by: Kim B. Heino <Kim.Heino@bluegiga.com>
This commit is contained in:
Kim B. Heino 2010-03-12 15:46:56 +02:00 committed by Remy Bohmer
parent d7a22a364c
commit aaad108b88
2 changed files with 9 additions and 6 deletions
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13
common/cmd_usb.c
View file

@ -387,7 +387,7 @@ int do_usbboot(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
dev = simple_strtoul(boot_device, &ep, 16);
stor_dev = usb_stor_get_dev(dev);
if (stor_dev->type == DEV_TYPE_UNKNOWN) {
if (stor_dev == NULL || stor_dev->type == DEV_TYPE_UNKNOWN) {
printf("\n** Device %d not available\n", dev);
return 1;
}
@ -595,8 +595,10 @@ int do_usb(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
if (strncmp(argv[1], "part", 4) == 0) {
int devno, ok = 0;
if (argc == 2) {
for (devno = 0; devno < USB_MAX_STOR_DEV; ++devno) {
for (devno = 0; ; ++devno) {
stor_dev = usb_stor_get_dev(devno);
if (stor_dev == NULL)
break;
if (stor_dev->type != DEV_TYPE_UNKNOWN) {
ok++;
if (devno)
@ -608,7 +610,8 @@ int do_usb(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
} else {
devno = simple_strtoul(argv[2], NULL, 16);
stor_dev = usb_stor_get_dev(devno);
if (stor_dev->type != DEV_TYPE_UNKNOWN) {
if (stor_dev != NULL &&
stor_dev->type != DEV_TYPE_UNKNOWN) {
ok++;
debug("print_part of %x\n", devno);
print_part(stor_dev);
@ -668,12 +671,12 @@ int do_usb(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
if (argc == 3) {
int dev = (int)simple_strtoul(argv[2], NULL, 10);
printf("\nUSB device %d: ", dev);
if (dev >= USB_MAX_STOR_DEV) {
stor_dev = usb_stor_get_dev(dev);
if (stor_dev == NULL) {
printf("unknown device\n");
return 1;
}
printf("\n Device %d: ", dev);
stor_dev = usb_stor_get_dev(dev);
dev_print(stor_dev);
if (stor_dev->type == DEV_TYPE_UNKNOWN)
return 1;

2
common/usb_storage.c
View file

@ -175,7 +175,7 @@ void uhci_show_temp_int_td(void);
block_dev_desc_t *usb_stor_get_dev(int index)
{
return (index < USB_MAX_STOR_DEV) ? &usb_dev_desc[index] : NULL;
return (index < usb_max_devs) ? &usb_dev_desc[index] : NULL;
}