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mmc: sdhci-msm: Add the missing check in sdhci_msm_check_power_status

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On multi-card tray designs, the same card-tray would be used for SD
card and SIM cards. If SD card is placed at the rightmost location
in the tray, then SIM card may come in contact with SD card power-
supply while removing the tray. It may result in SIM damage.

So in sdhci_msm_handle_pwr_irq we skip the BUS_ON request when the
SD card is removed to be in consistent with the MGPI hardware fix to
prevent any damage to the SIM card in case of mult-card tray designs.

But we need to have a similar check in sdhci_msm_check_power_status to
be in consistent with the sdhci_msm_handle_pwr_irq function.

Change-Id: Ia3248139f351fa80dde163f805fa072cb298f39b
Signed-off-by: Sarthak Garg <sartgarg@codeaurora.org>
This commit is contained in:
Sarthak Garg 2020-09-04 12:49:06 +05:30
commit 8a53211a41
1 changed files with 4 additions and 2 deletions
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6
drivers/mmc/host/sdhci-msm.c
View file

@ -1751,8 +1751,10 @@ static void sdhci_msm_check_power_status(struct sdhci_host *host, u32 req_type)
return;
}
if (mmc->ops->get_cd && !mmc->ops->get_cd(mmc)) {
pr_debug("%s: card is not present. Do not wait for pwr irq\n",
if (mmc->card && mmc->ops->get_cd && !mmc->ops->get_cd(mmc) &&
(req_type & REQ_BUS_ON)) {
pr_debug(
"%s: Regulators are never turned on when SD card is removed so do not wait for pwr irq\n",
mmc_hostname(host->mmc));
return;
}