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Unverified Commit f8f45f66 authored by Jaegeuk Kim's avatar Jaegeuk Kim Committed by Michael Bestas
Browse files

scsi: ufs: atomic update for clkgating_enable 



Bug: 134949663
Bug: 137150088
Bug: 149155051
Test: test with powerhint feature
Change-Id: Ie5002107a69e7d56a889138eec0e593de1bf6a61
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@google.com>
Signed-off-by: default avatarLeo Liou <leoliou@google.com>
parent 29fb462c

drivers/scsi/ufs/ufshcd.c

+6 −6
Original line number Diff line number Diff line
@@ -2514,19 +2514,19 @@ static ssize_t ufshcd_clkgate_enable_store(struct device *dev, 
		return -EINVAL;



	value = !!value;



	spin_lock_irqsave(hba->host->host_lock, flags);

	if (value == hba->clk_gating.is_enabled)

		goto out;



	if (value) {

		ufshcd_release(hba, false);

	} else {

		spin_lock_irqsave(hba->host->host_lock, flags);

	if (value)

		hba->clk_gating.active_reqs--;

	else

		hba->clk_gating.active_reqs++;

		spin_unlock_irqrestore(hba->host->host_lock, flags);

	}



	hba->clk_gating.is_enabled = value;

out:

	spin_unlock_irqrestore(hba->host->host_lock, flags);

	return count;

}