Hi,
I have an android box, and the kernel is 2.6.32. and my sd card
host driver use the sdhci driver.
now I have a problem when sdhost suspend and resume.
>From the log, after the system suspend, just before sdhost resume,
there is a sdhci_request io happen. in the sdhci_request, it still
call sdhci_send_command to issue a command, but here the sdhost
is in the suspend state and the card has been power off, so the
command fails.
I want to know is this a power manage bug or sdhost bug?
does the sd card io request that happens between suspend and resume
is possible? or the sdhci_request should check more sd host state
before send command?
In sdhci_request
if (!present || host->flags & SDHCI_DEVICE_DEAD) {
host->mrq->cmd->error = -ENOMEDIUM;
tasklet_schedule(&host->finish_tasklet);
} else
sdhci_send_command(host, mrq->cmd);
In my case the __present__ is true and SDHCI device is not dead,
because my sdcard has the quirk
'SDHCI_QUIRK_NO_CARD_NO_RESET' and the card
is always in the slot.
could you expert give me some advice? thanks a lot.
below are the config of my sd card:
CONFIG_MMC=y
CONFIG_MMC_DEBUG=y
CONFIG_MMC_UNSAFE_RESUME=y
# CONFIG_MMC_EMBEDDED_SDIO is not set
# CONFIG_MMC_PARANOID_SD_INIT is not set
#
# MMC/SD/SDIO Card Drivers
#
CONFIG_MMC_BLOCK=y
CONFIG_MMC_BLOCK_BOUNCE=y
CONFIG_MMC_BLOCK_DEFERRED_RESUME=y
# CONFIG_SDIO_UART is not set
# CONFIG_MMC_TEST is not set
#
# MMC/SD/SDIO Host Controller Drivers
#
CONFIG_MMC_SDHCI=y
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