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Update mmc.c
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@@ -337,7 +337,7 @@ static int mmc_select_bus_width(struct rt_mmcsd_card *card, rt_uint8_t *ext_csd)
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for(trys = 0; trys < 5; trys++){
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mmcsd_set_bus_width(host, bus_width);
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mmcsd_delay_ms(10);
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mmcsd_delay_ms(10);
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err = mmc_compare_ext_csds(card, ext_csd, bus_width);
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if(!err)
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break;
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