Alle 18:44, venerdì 9 febbraio 2007, Laurent Pinchart ha scritto: > Thanks for pointing this out. Out of curiosity, do you have any idea why > PROT_WRITE is required for video acquisition mappings ? Without PROT_WRITE, > user space applications can't write to the buffer. I haven't been able to > find any other implication.
Consistency is one reason why PROT_WRITE is required. The access mode to the device is always RW regardless of the type of device, open() flags must be set to O_RDRW, so both PROT_READ and PROT_WRITE must be passed to mmap(). Best regards Luca Risolia _______________________________________________ Linux-uvc-devel mailing list [email protected] https://lists.berlios.de/mailman/listinfo/linux-uvc-devel
