A-Team_Digital_Solutions/android_kernel_motorola_sm6375
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android_kernel_motorola_sm6375/drivers/mmc
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Filename Latest commit message Latest commit date
Chuansheng Liu 63c211803a mmc: sdhci: Setting the host->mrq to NULL before executing tuning 
In function sdhci_request(), it is possible to do the tuning execution
like below:

sdhci_request() {
	spin_lock_irqsave(&host->lock, flags);
	host->mrq = mrq;
	...
	spin_unlock_irqrestore(&host->lock, flags);

<=== Here it is possible one pending finish_tasklet get running
     and it will operate the original mrq, and notified the mrq
     is done, and causes memory corruption.

	sdhci_execute_tuning(mmc, tuning_opcode);
	spin_lock_irqsave(&host->lock, flags);
	host->mrq = mrq;
...
}

In the above race place, the original mrq should not be finished wrongly,
so here before unlock the spinlock, we need to set the host->mrq to NULL
to avoid this case.

Signed-off-by: Liu, Chuansheng <chuansheng.liu@intel.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
2014-01-13 12:48:13 -05:00
..
card mmc: fix host release issue after discard operation 2014-01-13 12:48:10 -05:00
core mmc: core: mmc DDR mode should not depend on UHS_DDR50 2014-01-13 12:48:05 -05:00
host mmc: sdhci: Setting the host->mrq to NULL before executing tuning 2014-01-13 12:48:13 -05:00
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