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Retry hot reset a few times if necessary

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This commit is contained in:
Alex Forencich 2021-09-13 13:51:36 -07:00
parent 5435db91cb
commit 3d64e5fc30
1 changed files with 38 additions and 26 deletions
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64
utils/mqnic-fw.c
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@ -1250,35 +1250,47 @@ int main(int argc, char *argv[])
sleep(1);
printf("Performing hot reset on upstream port...\n");
pcie_hot_reset(port_path);
sleep(2);
printf("Rescanning on upstream port...\n");
snprintf(path, sizeof(path), "%s/rescan", port_path);
if (write_1_to_file(path))
for (int tries = 5; tries > 0; tries--)
{
fprintf(stderr, "Rescan failed!\n");
ret = -1;
goto err;
printf("Performing hot reset on upstream port...\n");
pcie_hot_reset(port_path);
sleep(2);
printf("Rescanning on upstream port...\n");
snprintf(path, sizeof(path), "%s/rescan", port_path);
if (write_1_to_file(path))
{
fprintf(stderr, "Rescan failed!\n");
ret = -1;
goto err;
}
// PCIe device will have a config space, so check for that
snprintf(path, sizeof(path), "%s/config", device_path);
if (access(path, F_OK) == 0)
{
printf("Success, device is online!\n");
break;
}
else
{
if (tries > 0)
{
printf("Rescan failed, attempting another reset (up to %d more)\n", tries);
}
else
{
fprintf(stderr, "Rescan failed, device is offline!\n");
ret = -1;
goto err;
}
}
}
// PCIe device will have a config space, so check for that
snprintf(path, sizeof(path), "%s/config", device_path);
if (access(path, F_OK) != -1)
{
printf("Success, device is online!\n");
}
else
{
fprintf(stderr, "Rescan failed, device is offline!\n");
ret = -1;
goto err;
}
}
err: