mmc: sdhci: Separate timer timeout for command and data requests
In order to support commands during data transfer, there will have to be up
to two active requests (mrqs) at a time, instead of just one. Provide two
timers instead of just one. One of the timers is for requests that do not
use the data lines, and the other one is for requests that do.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index b7b68b3..9580f76 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1003,6 +1003,23 @@
}
}
+static void sdhci_mod_timer(struct sdhci_host *host, struct mmc_request *mrq,
+ unsigned long timeout)
+{
+ if (sdhci_data_line_cmd(mrq->cmd))
+ mod_timer(&host->data_timer, timeout);
+ else
+ mod_timer(&host->timer, timeout);
+}
+
+static void sdhci_del_timer(struct sdhci_host *host, struct mmc_request *mrq)
+{
+ if (sdhci_data_line_cmd(mrq->cmd))
+ del_timer(&host->data_timer);
+ else
+ del_timer(&host->timer);
+}
+
void sdhci_send_command(struct sdhci_host *host, struct mmc_command *cmd)
{
int flags;
@@ -1044,7 +1061,7 @@
timeout += DIV_ROUND_UP(cmd->busy_timeout, 1000) * HZ + HZ;
else
timeout += 10 * HZ;
- mod_timer(&host->timer, timeout);
+ sdhci_mod_timer(host, cmd->mrq, timeout);
host->cmd = cmd;
if (sdhci_data_line_cmd(cmd)) {
@@ -2232,10 +2249,10 @@
return;
}
- del_timer(&host->timer);
-
mrq = host->mrq;
+ sdhci_del_timer(host, mrq);
+
/*
* Always unmap the data buffers if they were mapped by
* sdhci_prepare_data() whenever we finish with a request.
@@ -2289,7 +2306,30 @@
spin_lock_irqsave(&host->lock, flags);
- if (host->mrq) {
+ if (host->cmd && !sdhci_data_line_cmd(host->cmd)) {
+ pr_err("%s: Timeout waiting for hardware cmd interrupt.\n",
+ mmc_hostname(host->mmc));
+ sdhci_dumpregs(host);
+
+ host->cmd->error = -ETIMEDOUT;
+ sdhci_finish_mrq(host, host->cmd->mrq);
+ }
+
+ mmiowb();
+ spin_unlock_irqrestore(&host->lock, flags);
+}
+
+static void sdhci_timeout_data_timer(unsigned long data)
+{
+ struct sdhci_host *host;
+ unsigned long flags;
+
+ host = (struct sdhci_host *)data;
+
+ spin_lock_irqsave(&host->lock, flags);
+
+ if (host->data || host->data_cmd ||
+ (host->cmd && sdhci_data_line_cmd(host->cmd))) {
pr_err("%s: Timeout waiting for hardware interrupt.\n",
mmc_hostname(host->mmc));
sdhci_dumpregs(host);
@@ -2297,13 +2337,12 @@
if (host->data) {
host->data->error = -ETIMEDOUT;
sdhci_finish_data(host);
+ } else if (host->data_cmd) {
+ host->data_cmd->error = -ETIMEDOUT;
+ sdhci_finish_mrq(host, host->data_cmd->mrq);
} else {
- if (host->cmd)
- host->cmd->error = -ETIMEDOUT;
- else
- host->mrq->cmd->error = -ETIMEDOUT;
-
- sdhci_finish_mrq(host, host->mrq);
+ host->cmd->error = -ETIMEDOUT;
+ sdhci_finish_mrq(host, host->cmd->mrq);
}
}
@@ -3432,6 +3471,8 @@
sdhci_tasklet_finish, (unsigned long)host);
setup_timer(&host->timer, sdhci_timeout_timer, (unsigned long)host);
+ setup_timer(&host->data_timer, sdhci_timeout_data_timer,
+ (unsigned long)host);
init_waitqueue_head(&host->buf_ready_int);
@@ -3541,6 +3582,7 @@
free_irq(host->irq, host);
del_timer_sync(&host->timer);
+ del_timer_sync(&host->data_timer);
tasklet_kill(&host->finish_tasklet);