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

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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>
This commit is contained in:
Sahitya Tummala 2016-04-26 15:00:04 +05:30 • committed by Gerrit - the friendly Code Review server
parent 118ca5d727
commit 9b97ea99ee
1 changed files with 6 additions and 0 deletions
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6
drivers/mmc/core/core.c
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@ -1552,6 +1552,12 @@ 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),