Re: Weird MMC errors: 2 of 2 - inconsistent state after data crc error

[Alex Dubov]

Problem 2: After a data crc error all subsequent commands fail. May it be caused by stop command
leaving card in some bad state (something clearable by SEND_STATUS)? On the other hand, is there a
real need to issue a stop command in case main command failed?

---- Example: ----
Mar 14 09:25:13 Tirion kernel:  mmcblk0:<7>mmc0: starting CMD18 arg 00000000 flags 00000035
Mar 14 09:25:13 Tirion kernel: tifm_sd tifm_sd0:1: setting dma for 8 blocks
Mar 14 09:25:13 Tirion kernel: tifm_sd tifm_sd0:1: executing opcode 0x12, arg: 0x0, mask: 0xb100
Mar 14 09:25:13 Tirion kernel: tifm_sd tifm_sd0:1: host event: host_status 1, flags 0
Mar 14 09:25:13 Tirion kernel: tifm_sd tifm_sd0:1: host event: host_status 40, flags 1
Mar 14 09:25:13 Tirion kernel: tifm_sd tifm_sd0:1: executing opcode 0xc, arg: 0x0, mask: 0x2900
Mar 14 09:25:13 Tirion kernel: tifm_sd tifm_sd0:1: host event: host_status 80, flags 9
Mar 14 09:25:13 Tirion kernel: mmc0: req done (CMD18): 0/2/1: 00000900 00000000 00000000 00000000
Mar 14 09:25:13 Tirion kernel: mmcblk0: error 2 transferring data
Mar 14 09:25:13 Tirion kernel: end_request: I/O error, dev mmcblk0, sector 0
Mar 14 09:25:13 Tirion kernel: printk: 342 messages suppressed.
Mar 14 09:25:13 Tirion kernel: Buffer I/O error on device mmcblk0, logical block 0
Mar 14 09:25:13 Tirion kernel: mmc0: starting CMD18 arg 00000000 flags 00000035
Mar 14 09:25:13 Tirion kernel: tifm_sd tifm_sd0:1: setting dma for 8 blocks
Mar 14 09:25:13 Tirion kernel: tifm_sd tifm_sd0:1: executing opcode 0x12, arg: 0x0, mask: 0xb100
Mar 14 09:25:13 Tirion kernel: tifm_sd tifm_sd0:1: host event: host_status 80, flags 0
Mar 14 09:25:13 Tirion kernel: tifm_sd tifm_sd0:1: executing opcode 0xc, arg: 0x0, mask: 0x2900
Mar 14 09:25:13 Tirion kernel: tifm_sd tifm_sd0:1: host event: host_status 80, flags 8
Mar 14 09:25:13 Tirion kernel: mmc0: req done (CMD18): 1/0/1: 00000000 00000000 00000000 00000000



 
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