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authorMika Westerberg <mika.westerberg@linux.intel.com>2011-08-18 14:23:49 +0200
committerChris Ball <cjb@laptop.org>2011-08-31 22:25:50 +0200
commit50a50f9248497484c678631a9c1a719f1aaeab79 (patch)
tree76ade75d46ca9cd6b4f2803d65a86c0763f4c5e6 /drivers/mmc
parentmmc: core: prevent aggressive clock gating racing with ios updates (diff)
downloadlinux-50a50f9248497484c678631a9c1a719f1aaeab79.tar.xz
linux-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.c2
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);
}