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| author | Haren Myneni <haren@us.ibm.com> | 2018-06-04 11:33:38 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-06-04 15:58:41 +0300 |
| commit | 75743649064ec0cf5ddd69f240ef23af66dde16e (patch) | |
| tree | 05a2c523db422b9f5f556828a0b939b4763ea0e5 /arch/powerpc | |
| parent | 04debf21fa1741e7d752c37550f7e4816e4067c4 (diff) | |
| download | linux-75743649064ec0cf5ddd69f240ef23af66dde16e.tar.xz | |
powerpc/powernv: copy/paste - Mask SO bit in CR
NX can set the 3rd bit in CR register for XER[SO] (Summary overflow)
which is not related to paste request. The current paste function
returns failure for a successful request when this bit is set. So mask
this bit and check the proper return status.
Fixes: 2392c8c8c045 ("powerpc/powernv/vas: Define copy/paste interfaces")
Cc: stable@vger.kernel.org # v4.14+
Signed-off-by: Haren Myneni <haren@us.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/platforms/powernv/copy-paste.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/powerpc/platforms/powernv/copy-paste.h b/arch/powerpc/platforms/powernv/copy-paste.h index 3fa62de96d9c..cb36f9fbcef3 100644 --- a/arch/powerpc/platforms/powernv/copy-paste.h +++ b/arch/powerpc/platforms/powernv/copy-paste.h @@ -41,5 +41,6 @@ static inline int vas_paste(void *paste_address, int offset) : "b" (offset), "b" (paste_address) : "memory", "cr0"); - return (cr >> CR0_SHIFT) & CR0_MASK; + /* We mask with 0xE to ignore SO */ + return (cr >> CR0_SHIFT) & 0xE; } |