On 20 July 2018 at 19:52, DDI Ognian Tschakalov <ognian.tschakalov@xxxxxxxxxx> wrote: > Hello, > I’m reading the health info of a SD card: > > using 4.17.6-200.fc28.aarch64 on an rpi3 and rpi3+ > > with the following code segment > ---------------------- > struct mmc_ioc_cmd idata; > char data_out[SD_BLOCK_SIZE]; > memset(&idata, 0, sizeof(idata)); > memset(&data_out[0], 0, sizeof(__u8) * SD_BLOCK_SIZE); > idata.write_flag = 1; > idata.opcode = SD_GEN_CMD; > idata.arg = cmd56_arg; > idata.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC; > idata.blksz = SD_BLOCK_SIZE; > idata.blocks = 1; > mmc_ioc_cmd_set_data(idata, data_out); > > ret = ioctl(fd, MMC_IOC_CMD, &idata); > ---------------------- > > leads to > > Jul 20 18:23:53 ogi-it-rpi-p kernel: sdhost-bcm2835 3f202000.mmc: timeout waiting for hardware interrupt. > Jul 20 18:23:53 ogi-it-rpi-p kernel: sdhost-bcm2835 3f202000.mmc: __mmc_blk_ioctl_cmd: data error -110 > > this was flawlessly working in fc27 which should be the 4.16 kernel i think > > Actually this is the first of 2 consecutive commands send to the card; If I ignore the above error and continue with the second command I can successfully read the health data. The problem is that the above command takes 10 seconds (timeout) before it throws the above error… > > Actually it is not expected to get any data from the above write command… > Maybe I have set the wrong flags or did something change between 4.16 and 4.17.6 Thanks for reporting! Would it be possible for you to run a git-bisect to narrow down the problem? Kind regards Uffe -- 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
