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| author | Vaibhav Jain <vaibhav@linux.vnet.ibm.com> | 2017-11-24 09:33:38 +0100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2017-11-29 09:56:18 +0100 |
| commit | 7e4d4233260be0611c7fbdb2730c12731c4b8dc0 (patch) | |
| tree | 52eab6d31594903d88d7dd68f547d16bf873106c /drivers/misc | |
| parent | powerpc: Avoid signed to unsigned conversion in set_thread_tidr() (diff) | |
| download | linux-7e4d4233260be0611c7fbdb2730c12731c4b8dc0.tar.xz linux-7e4d4233260be0611c7fbdb2730c12731c4b8dc0.zip | |
powerpc: Do not assign thread.tidr if already assigned
If set_thread_tidr() is called twice for same task_struct then it will
allocate a new tidr value to it leaving the previous value still
dangling in the vas_thread_ida table.
To fix this the patch changes set_thread_tidr() to check if a tidr
value is already assigned to the task_struct and if yes then returns
zero.
Fixes: ec233ede4c86("powerpc: Add support for setting SPRN_TIDR")
Signed-off-by: Vaibhav Jain <vaibhav@linux.vnet.ibm.com>
Reviewed-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
[mpe: Modify to return 0 in the success case, not the TID value]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'drivers/misc')
0 files changed, 0 insertions, 0 deletions