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XHCI is hung up in the readl

Question asked by tom gao on Apr 17, 2017
Latest reply on Apr 18, 2017 by Bio_TICFSL

After I compile the XHCI to modul ,the kernel Hung up when boot up to xhci_gen_setup->HC_LENGTH(readl(&xhci->cap_regs->hc_capbase)); 

   who can tell me why ? when I build in it is no problem .