Hi Liu, On Fri, Nov 16, 2012 at 2:54 PM, Chuansheng Liu <chuansheng.liu@xxxxxxxxx> wrote: > So when calling pm_runtime_set_active(), it will hit the strlen(devname==0) > which trigger the panic. Can you please point to the exact line of code that triggers this panic ? > Here before calling pm_runtime_set_active(), set the dev name, although > it is duplicated with mmc_add_card(), but it do not break the original > design(commit 81968561b). Normally we'd like to avoid such a solution, so let's first make sure we understand the problem. Have you tried thinking how come this shows up only now - has any of the relevant code been changed lately ? Are you using a vanilla Linux tree ? Thanks, Ohad. -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html