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authorMika Westerberg <mika.westerberg@linux.intel.com>2011-08-18 15:23:49 +0300
committerGreg Kroah-Hartman <gregkh@suse.de>2011-10-03 11:40:10 -0700
commit6942511b6b2a4a6b1fb969905c6841bdb7c1083c (patch)
treedb365d375c8a3009962279334cb2d98c6e4ddfdf /drivers/mmc
parent0bd01aeeec0a9ba11adceb71aceed08ed276e3c0 (diff)
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mmc: core: use non-reentrant workqueue for clock gating
commit 50a50f9248497484c678631a9c1a719f1aaeab79 upstream. 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> Signed-off-by: Chris Ball <cjb@laptop.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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 96a26b2..793d0a0 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);
}