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The dasd_device_from_cdev function is called from interrupt context to get the struct dasd_device associated with a ccw device. The driver_data of the ccw device points to the dasd_devmap structure which contains the pointer to the dasd_device structure. The lock that protects the dasd_devmap structure is acquire with out irqsave. To prevent the deadlock in dasd_device_from_cdev if it is called from interrupt context the dependency to the dasd_devmap structure needs to be removed. Let the driver_data of the ccw device point to the dasd_device structure directly and use the ccw device lock to protect the access. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> |
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block | ||
char | ||
cio | ||
crypto | ||
net | ||
scsi | ||
ebcdic.c | ||
Kconfig | ||
Makefile | ||
s390_rdev.c | ||
s390mach.c | ||
s390mach.h | ||
sysinfo.c |