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authorMichael Ellerman <michael@ellerman.id.au>2008-04-30 14:47:12 +1000
committerPaul Mackerras <paulus@samba.org>2008-04-30 19:49:48 +1000
commiteabd90944b3a00766e84da3d117ea0f3e0a3b1a3 (patch)
tree63899a91d207c3b72ddae1984742e1438b4a7e9b /Documentation
parent3243d87441bf7f97c5c9f7dd46b35f5783ec6740 (diff)
[POWERPC] Fix crashkernel= handling when no crashkernel= specified
Commit edd8ce67436851a62f99f1d9707b40ea6a8e5323 (Use extended crashkernel command line on ppc64), changed the logic in reserve_crashkernel() which deals with the crashkernel= command line option. This introduced a bug in the case when there is no crashkernel= option, or it is incorrect. We would fall through and calculate the crash_size based on the existing values in crashk_res. If both start and end are 0, the default, we calculate the crash_size as 1 byte - which is wrong. Rework the logic so that we use crashk_res, regardless of whether it's set by the command line or via the device tree (see prom.c). Then check if we have an empty range (end == start), and if so make sure to set both end and start to zero (this is checked in machine_kexec_64.c). Then we calculate the crash_size once we know we have a non-zero range. Finally we always want to warn the user if they specify a base != 32MB, so remove the special case for that in the command line parsing case. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
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