Commit 26dc8d99 authored Apr 26, 2016 by Sahitya Tummala Committed by Gerrit - the friendly Code Review server May 31, 2016

mmc: core: check if CQE is already disabled before halt/unhalt



Upon any CQ error, the driver tries to halt the CQE first and
if it fails to halt, then CQE is disabled. The error handling
work function mmc_blk_cmdq_err() also tries to HALT the CQE
at couple of places and takes some action based on the HALT
success/error status. But since CQE is disabled, we should not
treat any errors of CQE halt/unhalt as critical and in fact,
we should not even attempt to halt/unhalt.

Change-Id: I6bef9f2c033f78ad0959954acc5d7627e8a92139
Signed-off-by: Sahitya Tummala <stummala@codeaurora.org>
Signed-off-by: Sayali Lokhande <sayalil@codeaurora.org>

parent caf653d8

drivers/mmc/core/core.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -1476,6 +1476,12 @@ int mmc_cmdq_halt(struct mmc_host *host, bool halt)
		{
		int err = 0;

		if (mmc_host_cq_disable(host)) {
		pr_debug("%s: %s: CQE is already disabled\n",
		mmc_hostname(host), __func__);
		return 0;
		}

		if ((halt && mmc_host_halt(host)) \|\|
		(!halt && !mmc_host_halt(host))) {
		pr_debug("%s: %s: CQE is already %s\n", mmc_hostname(host),