Prabu Thangamuthu 048fd7e665
mmc: dw_mmc: insmod followed by rmmod will hung for eMMC ...
Remove module of dw_mmc driver will hung for eMMC devices if we follow the
steps which are listed below,
insmod dw_mmc.ko
insmod dw_mmc-pci.ko
rmmod dw_mmc-pci.ko
The root cause for this issue is, dw_mci_remove() will disable all the
interrupts by programming 0x0 to INTMASK register then it will call
dw_mci_cleanup_slot(). But dw_mci_cleanup_slot() is issuing CMD6 to
disable the eMMC boot partition and it is waiting for Command Complete
interrupt. Since INTMASK was already cleared by dw_mci_remove(), Command
Complete interrupt is not reaching the system. This leads to process hung.
Signed-off-by: Prabu Thangamuthu <prabu.t@synopsys.com >
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com >
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org >
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