From: Wei WANG <wei_wang@xxxxxxxxxxxxxx> For Realtek card reader, internal regsiter SD_CFG2 should be configured before transferring data. The default value of SD_CFG2 is proper for writing data. But for reading sequence, the timing is not good enough. So in some extreme circumstance, card reader may sample the response data from the card as good even if the data is wrong. And this will cause the bad consequence. In the prior version, the value of this register has been calculated, but forgotten to write back to the internal register. Signed-off-by: Wei WANG <wei_wang@xxxxxxxxxxxxxx> Acked-by: Chris Ball <cjb@xxxxxxxxxx> --- drivers/mmc/host/rtsx_pci_sdmmc.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/mmc/host/rtsx_pci_sdmmc.c b/drivers/mmc/host/rtsx_pci_sdmmc.c index 0e934bf..067dd46 100644 --- a/drivers/mmc/host/rtsx_pci_sdmmc.c +++ b/drivers/mmc/host/rtsx_pci_sdmmc.c @@ -405,6 +405,7 @@ static int sd_rw_multi(struct realtek_pci_sdmmc *host, struct mmc_request *mrq) rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_DATA_SOURCE, 0x01, RING_BUFFER); + rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG2, 0xFF, cfg2); rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_TRANSFER, 0xFF, trans_mode | SD_TRANSFER_START); rtsx_pci_add_cmd(pcr, CHECK_REG_CMD, SD_TRANSFER, -- 1.7.9.5 -- 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
