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staging: unisys: iovmcall_gnuc.h change -1 return values

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This patch changes the vague -1 return values to -EPERM.
This operation is not supported is a good alternative
to -1 because the return is basically telling the caller
that the processor doesn't support vmcall operations.

Signed-off-by: Erik Arfvidson <erik.arfvidson@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Erik Arfvidson 2016-05-13 23:17:21 -04:00 committed by Greg Kroah-Hartman
parent 119296eaa8
commit 35b2141556
1 changed files with 2 additions and 2 deletions
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4
drivers/staging/unisys/visorbus/iovmcall_gnuc.h
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@ -22,7 +22,7 @@ __unisys_vmcall_gnuc(unsigned long tuple, unsigned long reg_ebx,
cpuid(0x00000001, &cpuid_eax, &cpuid_ebx, &cpuid_ecx, &cpuid_edx); cpuid(0x00000001, &cpuid_eax, &cpuid_ebx, &cpuid_ecx, &cpuid_edx);
if (!(cpuid_ecx & 0x80000000)) if (!(cpuid_ecx & 0x80000000))
return -1; return -EPERM;
__asm__ __volatile__(".byte 0x00f, 0x001, 0x0c1" : "=a"(result) : __asm__ __volatile__(".byte 0x00f, 0x001, 0x0c1" : "=a"(result) :
"a"(tuple), "b"(reg_ebx), "c"(reg_ecx)); "a"(tuple), "b"(reg_ebx), "c"(reg_ecx));
@ -40,7 +40,7 @@ __unisys_extended_vmcall_gnuc(unsigned long long tuple,
cpuid(0x00000001, &cpuid_eax, &cpuid_ebx, &cpuid_ecx, &cpuid_edx); cpuid(0x00000001, &cpuid_eax, &cpuid_ebx, &cpuid_ecx, &cpuid_edx);
if (!(cpuid_ecx & 0x80000000)) if (!(cpuid_ecx & 0x80000000))
return -1; return -EPERM;
__asm__ __volatile__(".byte 0x00f, 0x001, 0x0c1" : "=a"(result) : __asm__ __volatile__(".byte 0x00f, 0x001, 0x0c1" : "=a"(result) :
"a"(tuple), "b"(reg_ebx), "c"(reg_ecx), "d"(reg_edx)); "a"(tuple), "b"(reg_ebx), "c"(reg_ecx), "d"(reg_edx));