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authorDavid S. Miller <davem@davemloft.net>2011-01-05 13:08:06 -0800
committerDavid S. Miller <davem@davemloft.net>2011-01-06 11:38:19 -0800
commit09798eb9479da3413bdf96e7d22a84d8b21e05e1 (patch)
tree75e7b1d5475d3ab72bbc0f1d306718800523e604 /arch/arm/plat-mxc/system.c
parent050855887236701c5e7ff803b42265824ce99885 (diff)
downloadlinux-09798eb9479da3413bdf96e7d22a84d8b21e05e1.tar.bz2
atyfb: Fix bootup hangs on sparc64.
After commit 25edd6946a1d74e5e77813c2324a0908c68bcf9e ("sparc64: Get rid of indirect p1275 PROM call buffer.") we can't pass virtual addresses >4GB to PROM calls. Largely this is never necessary in drivers because we have a copy of the entire PROM device tree in the kernel and a set of of_*() interfaces to access it. Unfortunately there were some lingering prom calls in the atyfb driver, in particular prom_finddevice() was being called with an on-stack address which could be anywhere. This code is actually probing for information we already have, the PROM choosen console output device is stored in of_console_device so all of this nasty code consolidates into a one-line comparison. Next we have some prom_getintdefault() calls which are trivially transformed into the equivalent of_getintprop_default(). Special thanks to Fabio, who figured out exactly where the bootup was hanging. That made this bug trivial to fix. Reported-by: Fabio M. Di NItto <fabbione@fabbione.net> Reported-by: Sam Ravnborg <sam@ravnborg.org> Reported-by: Frans van Berckel <fberckel@xs4all.nl> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Fabio M. Di NItto <fabbione@fabbione.net>
Diffstat (limited to 'arch/arm/plat-mxc/system.c')
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