diff options
| author |   Mika Westerberg <mika.westerberg@linux.intel.com> | 2011-08-18 15:23:49 +0300 |
|---|---|---|
| committer |   Chris Ball <cjb@laptop.org> | 2011-08-31 16:25:50 -0400 |
| commit | 50a50f9248497484c678631a9c1a719f1aaeab79 (patch) | |
| tree | 76ade75d46ca9cd6b4f2803d65a86c0763f4c5e6 /drivers/mmc | |
| parent | mmc: core: prevent aggressive clock gating racing with ios updates (diff) | |
| download | linux-dev-50a50f9248497484c678631a9c1a719f1aaeab79.tar.xz linux-dev-50a50f9248497484c678631a9c1a719f1aaeab79.zip | |
mmc: core: use non-reentrant workqueue for clock gating
The default multithread workqueue can cause the same work to be executed
concurrently on a different CPUs. This isn't really suitable for clock
gating as it might already gated the clock and gating it twice results both
host->clk_old and host->ios.clock to be set to 0.
To prevent this from happening we use system_nrt_wq instead.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Tested-by: Chris Ball <cjb@laptop.org>
Cc: <stable@kernel.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/core/host.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c index 96a26b2bf5f0..793d0a0dad8d 100644 --- a/drivers/mmc/core/host.c +++ b/drivers/mmc/core/host.c @@ -179,7 +179,7 @@ void mmc_host_clk_release(struct mmc_host *host) host->clk_requests--; if (mmc_host_may_gate_card(host->card) && !host->clk_requests) - schedule_work(&host->clk_gate_work); + queue_work(system_nrt_wq, &host->clk_gate_work); spin_unlock_irqrestore(&host->clk_lock, flags); } |