Hello,
newbie here, please bear with me...
It seems that CMD6/SD_SWITCH request locks up the mmc-moxart controller.
It does not respond to any command after CMD6.
The fix suggested by Mr. Jonas Jensen <jonas.jensen@xxxxxxxxx> is to
ignore the SD_SWITCH request in moxart_request()
My question is - looking at mmc_read_switch() in drivers/mmc/core/sd.c -
would be -EINVAL a proper response in this case?
This diff is against kernel 4.6.
Best regards,
Michal Kadlic
---
diff -purN a/drivers/mmc/host/moxart-mmc.c b/drivers/mmc/host/moxart-mmc.c
--- a/drivers/mmc/host/moxart-mmc.c 2016-06-01 14:23:01.000000000 +0200
+++ b/drivers/mmc/host/moxart-mmc.c 2016-06-01 14:37:08.856296102 +0200
@@ -411,6 +411,14 @@ static void moxart_request(struct mmc_ho
mrq->cmd->error = -ETIMEDOUT;
goto request_done;
}
+
+ if (mrq->cmd->opcode == SD_SWITCH) {
+
+ /* CMD6 (at least in mode 0) locks up the controller
+ * so we have to ignore this request */
+ mrq->cmd->error = -EINVAL;
+ goto request_done;
+ }
moxart_prepare_data(host);
moxart_send_command(host, host->mrq->cmd)
--
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