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pstore: Fix flags to enable dumps on powerpc

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commit 041939c1ec54208b42f5cd819209173d52a29d34 upstream.

After commit c950fd6f201a kernel registers pstore write based on flag set.
Pstore write for powerpc is broken as flags(PSTORE_FLAGS_DMESG) is not set for
powerpc architecture. On panic, kernel doesn't write message to
/fs/pstore/dmesg*(Entry doesn't gets created at all).

This patch enables pstore write for powerpc architecture by setting
PSTORE_FLAGS_DMESG flag.

Fixes: c950fd6f201a ("pstore: Split pstore fragile flags")
Signed-off-by: Ankit Kumar <ankit@linux.vnet.ibm.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ankit Kumar 2017-04-27 17:03:13 +05:30 committed by Greg Kroah-Hartman
parent 1a10295072
commit a4de930086
1 changed files with 1 additions and 0 deletions
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arch/powerpc/kernel/nvram_64.c
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@ -561,6 +561,7 @@ static ssize_t nvram_pstore_read(u64 *id, enum pstore_type_id *type,
static struct pstore_info nvram_pstore_info = {
.owner = THIS_MODULE,
.name = "nvram",
.flags = PSTORE_FLAGS_DMESG,
.open = nvram_pstore_open,
.read = nvram_pstore_read,
.write = nvram_pstore_write,