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| H A D | libata-eh.c | diff f1601113ddc0339a745e702f4fb1ca37d4875e65 Thu Nov 02 06:01:07 CDT 2017 Rameshwar Prasad Sahu <rsahu@apm.com> ata: fixes kernel crash while tracing ata_eh_link_autopsy event
When tracing ata link error event, the kernel crashes when the disk is
removed due to NULL pointer access by trace_ata_eh_link_autopsy API.
This occurs as the dev is NULL when the disk disappeared. This patch
fixes this crash by calling trace_ata_eh_link_autopsy only if "dev"
is not NULL.
v2 changes:
Removed direct passing "link" pointer instead of "dev" in trace API.
Signed-off-by: Rameshwar Prasad Sahu <rsahu@apm.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Fixes: 255c03d15a29 ("libata: Add tracepoints")
Cc: stable@vger.kernel.org # v4.1+
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