Hello Greg, Am Mittwoch, den 12.09.2007, 04:39 -0700 schrieb Greg KH: > > > Do an lseek back to 0 and then re-read, you will get called in your > > > driver again. > > > > No thats not true. I thought this too, but if I make a: > > > > seek (fd, 0L, SEEK_SET); > > > > in Userspace, there is no retrigger in the sysFS, my driver is *not* > > called again. So I made a own sysfs_seek function, which does retrigger > > the driver ... > > Hm, are you sure? Otherwise the poll() stuff would not work at all.
Yes. Sysfs uses generic_file_llseek (). And in sysfs_read_file () buffer->needs_read_fill must be 1, to reread from the driver. generic_file_llseek () doesnt change this variable. Best regards Heiko -- DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
