diff options
| author |   Faiz Abbas <faiz_abbas@ti.com> | 2019-10-15 00:08:49 +0530 |
|---|---|---|
| committer |   Ulf Hansson <ulf.hansson@linaro.org> | 2019-10-21 13:38:23 +0200 |
| commit | c07d0073b9ec80a139d07ebf78e9c30d2a28279e (patch) | |
| tree | 0d22647a5c59732bc5ced266b72e38527aac5a42 /drivers | |
| parent | mmc: sdhci-omap: Fix Tuning procedure for temperatures < -20C (diff) | |
| download | linux-dev-c07d0073b9ec80a139d07ebf78e9c30d2a28279e.tar.xz linux-dev-c07d0073b9ec80a139d07ebf78e9c30d2a28279e.zip | |
mmc: cqhci: Commit descriptors before setting the doorbell
Add a write memory barrier to make sure that descriptors are actually
written to memory, before ringing the doorbell.
Signed-off-by: Faiz Abbas <faiz_abbas@ti.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: stable@vger.kernel.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mmc/host/cqhci.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/mmc/host/cqhci.c b/drivers/mmc/host/cqhci.c index f7bdae5354c3..5047f7343ffc 100644 --- a/drivers/mmc/host/cqhci.c +++ b/drivers/mmc/host/cqhci.c @@ -611,7 +611,8 @@ static int cqhci_request(struct mmc_host *mmc, struct mmc_request *mrq) cq_host->slot[tag].flags = 0; cq_host->qcnt += 1; - + /* Make sure descriptors are ready before ringing the doorbell */ + wmb(); cqhci_writel(cq_host, 1 << tag, CQHCI_TDBR); if (!(cqhci_readl(cq_host, CQHCI_TDBR) & (1 << tag))) pr_debug("%s: cqhci: doorbell not set for tag %d\n", |