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Commit cfbe993d authored by Zhen Kong's avatar Zhen Kong Committed by Gerrit - the friendly Code Review server
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qseecom: decrease clk_access_cnt 



When scm_call returns EBUSY and app_access_lock is released,
clk_access_cnt could be larger than 2 as a new qseecom thread
may come to increase clk_access_cnt in this situation. So
clk_access_cnt should be always decreased.

Change-Id: I2400e807b9f15e3d7d8caad6978bfa93aa3cdd76
Signed-off-by: default avatarZhen Kong <zkong@codeaurora.org>
parent 7dcd447f

drivers/misc/qseecom.c

+3 −6
Original line number Diff line number Diff line
@@ -1778,20 +1778,17 @@ static int __qseecom_decrease_clk_ref_count(enum qseecom_ce_hw_instance ce) 
	else

		qclk = &qseecom.ce_drv;



	if (qclk->clk_access_cnt > 2) {

	if (qclk->clk_access_cnt > 0) {

		qclk->clk_access_cnt--;

	} else {

		pr_err("Invalid clock ref count %d\n", qclk->clk_access_cnt);

		ret = -EINVAL;

		goto err_dec_ref_cnt;

	}

	if (qclk->clk_access_cnt == 2)

		qclk->clk_access_cnt--;



err_dec_ref_cnt:

	mutex_unlock(&clk_access_lock);

	return ret;

}





static int qseecom_scale_bus_bandwidth_timer(uint32_t mode)

{

	int32_t ret = 0;