0b5d87fd30
As usual, this patches were taken (and rebased) from https://github.com/raspberrypi/linux/commits/rpi-4.1.y Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com> SVN-Revision: 46853
65 lines
2.0 KiB
Diff
65 lines
2.0 KiB
Diff
From 0bb775b407dab3bab972663ef47dde38b0d34c24 Mon Sep 17 00:00:00 2001
|
|
From: Phil Elwell <phil@raspberrypi.org>
|
|
Date: Mon, 20 Jul 2015 17:32:18 +0100
|
|
Subject: [PATCH 130/171] 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) {
|