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ACPI, APEI, Fix ERST MOVE_DATA instruction implementation

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The src_base and dst_base fields in apei_exec_context are physical
address, so they should be ioremaped before being used in ERST
MOVE_DATA instruction.

Reported-by: Javier Martinez Canillas <[email protected]>
Reported-by: Andrew Morton <[email protected]>
Signed-off-by: Huang Ying <[email protected]>
Signed-off-by: Len Brown <[email protected]>
This commit is contained in:
Huang Ying 2010-09-29 19:53:55 +08:00 • committed by Len Brown
commit 0bbba38a61
1 changed files with 20 additions and 3 deletions
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23
drivers/acpi/apei/erst.c
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@ -266,13 +266,30 @@ static int erst_exec_move_data(struct apei_exec_context *ctx,
{
int rc;
u64 offset;
void *src, *dst;
/* ioremap does not work in interrupt context */
if (in_interrupt()) {
pr_warning(ERST_PFX
"MOVE_DATA can not be used in interrupt context");
return -EBUSY;
}
rc = __apei_exec_read_register(entry, &offset);
if (rc)
return rc;
memmove((void *)ctx->dst_base + offset,
(void *)ctx->src_base + offset,
ctx->var2);
src = ioremap(ctx->src_base + offset, ctx->var2);
if (!src)
return -ENOMEM;
dst = ioremap(ctx->dst_base + offset, ctx->var2);
if (!dst)
return -ENOMEM;
memmove(dst, src, ctx->var2);
iounmap(src);
iounmap(dst);
return 0;
}