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65 lines
2.0 KiB
Diff
65 lines
2.0 KiB
Diff
From 0bb775b407dab3bab972663ef47dde38b0d34c24 Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.org>
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Date: Mon, 20 Jul 2015 17:32:18 +0100
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Subject: [PATCH 130/171] bcm2835-sdhost: Ignore CRC7 for MMC CMD1
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It seems that the sdhost interface returns CRC7 errors for CMD1,
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which is the MMC-specific SEND_OP_COND. Returning these errors to
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the MMC layer causes a downward spiral, but ignoring them seems
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to be harmless.
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---
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drivers/mmc/host/bcm2835-sdhost.c | 39 +++++++++++++++++++++++----------------
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1 file changed, 23 insertions(+), 16 deletions(-)
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--- a/drivers/mmc/host/bcm2835-sdhost.c
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+++ b/drivers/mmc/host/bcm2835-sdhost.c
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@@ -959,25 +959,32 @@ static void bcm2835_sdhost_finish_comman
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mmc_hostname(host->mmc), sdcmd, sdhsts,
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bcm2835_sdhost_read(host, SDEDM));
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- if (sdhsts & SDHSTS_CMD_TIME_OUT) {
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- switch (host->cmd->opcode) {
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- case 5: case 52: case 53:
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- /* Don't warn about SDIO commands */
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- break;
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- default:
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- pr_err("%s: command timeout\n",
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+ if ((sdhsts & SDHSTS_CRC7_ERROR) &&
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+ (host->cmd->opcode == 1)) {
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+ if (host->debug)
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+ pr_info("%s: ignoring CRC7 error for CMD1\n",
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+ mmc_hostname(host->mmc));
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+ } else {
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+ if (sdhsts & SDHSTS_CMD_TIME_OUT) {
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+ switch (host->cmd->opcode) {
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+ case 5: case 52: case 53:
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+ /* Don't warn about SDIO commands */
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+ break;
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+ default:
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+ pr_err("%s: command timeout\n",
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+ mmc_hostname(host->mmc));
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+ break;
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+ }
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+ host->cmd->error = -ETIMEDOUT;
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+ } else {
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+ pr_err("%s: unexpected command error\n",
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mmc_hostname(host->mmc));
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- break;
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+ bcm2835_sdhost_dumpregs(host);
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+ host->cmd->error = -EIO;
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}
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- host->cmd->error = -ETIMEDOUT;
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- } else {
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- pr_err("%s: unexpected command error\n",
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- mmc_hostname(host->mmc));
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- bcm2835_sdhost_dumpregs(host);
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- host->cmd->error = -EIO;
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+ tasklet_schedule(&host->finish_tasklet);
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+ return;
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}
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- tasklet_schedule(&host->finish_tasklet);
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- return;
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}
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if (host->cmd->flags & MMC_RSP_PRESENT) {
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