On Tue, 4 Dec 2012, Anatolij Gustschin wrote: > mpc5121e doesn't have system interface registers, accessing this > register address space cause the machine check exception and a > kernel crash: > > ... > Machine check in kernel mode. > Caused by (from SRR1=49030): Transfer error ack signal > Oops: Machine check, sig: 7 [#1] > MPC5121 ADS > Modules linked in: > NIP: c025fd60 LR: c0265bb4 CTR: 00000000 > REGS: df82dac0 TRAP: 0200 Not tainted > (3.7.0-rc7-00641-g81e6c91) > MSR: 00049030 <EE,ME,IR,DR> CR: 42002024 XER: 20000000 > TASK = df824b70[1] 'swapper' THREAD: df82c000 > GPR00: 00000000 df82db70 df824b70 df3ed0f0 00000003 00000000 00000000 00000000 > GPR08: 00000020 32000000 c03550ec 20000000 22002028 00000000 c0003f5c 00000000 > GPR16: 00000000 00000000 00000000 00000000 00000000 00000000 c0423898 c0450000 > GPR24: 00000077 00000002 e5086180 1c000c00 e5086000 df33ec00 00000003 df34e000 > NIP [c025fd60] ehci_fsl_setup_phy+0xd0/0x354 > LR [c0265bb4] ehci_fsl_setup+0x220/0x284 > ... > > Fix it by checking 'have_sysif_regs' flag before register access. > > Signed-off-by: Anatolij Gustschin <agust@xxxxxxx> Acked-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
