diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.1/0130-bcm2835-sdhost-Ignore-CRC7-for-MMC-CMD1.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.1/0130-bcm2835-sdhost-Ignore-CRC7-for-MMC-CMD1.patch | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.1/0130-bcm2835-sdhost-Ignore-CRC7-for-MMC-CMD1.patch b/target/linux/brcm2708/patches-4.1/0130-bcm2835-sdhost-Ignore-CRC7-for-MMC-CMD1.patch new file mode 100644 index 0000000..ff80ffc --- /dev/null +++ b/target/linux/brcm2708/patches-4.1/0130-bcm2835-sdhost-Ignore-CRC7-for-MMC-CMD1.patch @@ -0,0 +1,64 @@ +From abc4d789f9fd535f05a3dcb08712dfd6bada45b6 Mon Sep 17 00:00:00 2001 +From: Phil Elwell <phil@raspberrypi.org> +Date: Mon, 20 Jul 2015 17:32:18 +0100 +Subject: [PATCH 130/203] bcm2835-sdhost: Ignore CRC7 for MMC CMD1 + +It seems that the sdhost interface returns CRC7 errors for CMD1, +which is the MMC-specific SEND_OP_COND. Returning these errors to +the MMC layer causes a downward spiral, but ignoring them seems +to be harmless. +--- + drivers/mmc/host/bcm2835-sdhost.c | 39 +++++++++++++++++++++++---------------- + 1 file changed, 23 insertions(+), 16 deletions(-) + +--- a/drivers/mmc/host/bcm2835-sdhost.c ++++ b/drivers/mmc/host/bcm2835-sdhost.c +@@ -959,25 +959,32 @@ static void bcm2835_sdhost_finish_comman + mmc_hostname(host->mmc), sdcmd, sdhsts, + bcm2835_sdhost_read(host, SDEDM)); + +- if (sdhsts & SDHSTS_CMD_TIME_OUT) { +- switch (host->cmd->opcode) { +- case 5: case 52: case 53: +- /* Don't warn about SDIO commands */ +- break; +- default: +- pr_err("%s: command timeout\n", ++ if ((sdhsts & SDHSTS_CRC7_ERROR) && ++ (host->cmd->opcode == 1)) { ++ if (host->debug) ++ pr_info("%s: ignoring CRC7 error for CMD1\n", ++ mmc_hostname(host->mmc)); ++ } else { ++ if (sdhsts & SDHSTS_CMD_TIME_OUT) { ++ switch (host->cmd->opcode) { ++ case 5: case 52: case 53: ++ /* Don't warn about SDIO commands */ ++ break; ++ default: ++ pr_err("%s: command timeout\n", ++ mmc_hostname(host->mmc)); ++ break; ++ } ++ host->cmd->error = -ETIMEDOUT; ++ } else { ++ pr_err("%s: unexpected command error\n", + mmc_hostname(host->mmc)); +- break; ++ bcm2835_sdhost_dumpregs(host); ++ host->cmd->error = -EIO; + } +- host->cmd->error = -ETIMEDOUT; +- } else { +- pr_err("%s: unexpected command error\n", +- mmc_hostname(host->mmc)); +- bcm2835_sdhost_dumpregs(host); +- host->cmd->error = -EIO; ++ tasklet_schedule(&host->finish_tasklet); ++ return; + } +- tasklet_schedule(&host->finish_tasklet); +- return; + } + + if (host->cmd->flags & MMC_RSP_PRESENT) { |