According to the specification, total access time is derived from both TAAC
and NSAC, which means the timeout should add both timeout_ns and
timeout_clks. Host drivers do that, so make the block driver do that too.
Signed-off-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
---
drivers/mmc/core/block.c | 42 +++++++++++++++++++++++++++++++++++-------
1 file changed, 35 insertions(+), 7 deletions(-)
diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c
index 0b40fc2ebf77..46e63aec1fcb 100644
--- a/drivers/mmc/core/block.c
+++ b/drivers/mmc/core/block.c
@@ -922,6 +922,34 @@ static int mmc_sd_num_wr_blocks(struct mmc_card *card, u32 *written_blocks)
return 0;
}
+static unsigned int mmc_blk_clock_khz(struct mmc_host *host)
+{
+ if (host->actual_clock)
+ return host->actual_clock / 1000;
+
+ /* Clock may be subject to a divisor, fudge it by a factor of 2. */
+ if (host->ios.clock)
+ return host->ios.clock / 2000;
+
+ /* How can there be no clock */
+ WARN_ON_ONCE(1);
+ return 100; /* 100 kHz is minimum possible value */
+}
+
+static unsigned int mmc_blk_data_timeout_ms(struct mmc_host *host,
+ struct mmc_data *data)
+{
+ unsigned int ms = DIV_ROUND_UP(data->timeout_ns, 1000000);
+ unsigned int khz;
+
+ if (data->timeout_clks) {
+ khz = mmc_blk_clock_khz(host);
+ ms += DIV_ROUND_UP(data->timeout_clks, khz);
+ }
+
+ return ms;
+}
+
static inline bool mmc_blk_in_tran_state(u32 status)
{
/*
@@ -1169,9 +1197,10 @@ static int mmc_blk_cmd_recovery(struct mmc_card *card, struct request *req,
*/
if (R1_CURRENT_STATE(status) == R1_STATE_DATA ||
R1_CURRENT_STATE(status) == R1_STATE_RCV) {
- err = send_stop(card,
- DIV_ROUND_UP(brq->data.timeout_ns, 1000000),
- req, gen_err, &stop_status);
+ unsigned int timeout;
+
+ timeout = mmc_blk_data_timeout_ms(card->host, &brq->data);
+ err = send_stop(card, timeout, req, gen_err, &stop_status);
if (err) {
pr_err("%s: error %d sending stop command\n",
req->rq_disk->disk_name, err);
@@ -1977,6 +2006,7 @@ static void mmc_blk_read_single(struct mmc_queue *mq, struct request *req)
struct mmc_host *host = card->host;
blk_status_t error = BLK_STS_OK;
int retries = 0;
+ unsigned int timeout = mmc_blk_data_timeout_ms(host, mrq->data);
do {
u32 status;
@@ -1995,10 +2025,8 @@ static void mmc_blk_read_single(struct mmc_queue *mq, struct request *req)
u32 stop_status = 0;
bool gen_err = false;
- err = send_stop(card,
- DIV_ROUND_UP(mrq->data->timeout_ns,
- 1000000),
- req, &gen_err, &stop_status);
+ err = send_stop(card, timeout, req, &gen_err,
+ &stop_status);
if (err)
goto error_exit;
}
--
1.9.1
--
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