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author | Mamatha Inamdar <mamatha4@linux.vnet.ibm.com> | 2019-08-22 09:20:49 +0200 |
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committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2019-09-20 20:58:11 +0200 |
commit | 6ef81c55a2b6584cb642917f5fdf3632ef44b670 (patch) | |
tree | 524c57e82fa0f5b59b5bec95b65c3066015fbe02 /tools/perf/builtin-kvm.c | |
parent | perf probe: Fix to clear tev->nargs in clear_probe_trace_event() (diff) | |
download | linux-6ef81c55a2b6584cb642917f5fdf3632ef44b670.tar.xz linux-6ef81c55a2b6584cb642917f5fdf3632ef44b670.zip |
perf session: Return error code for perf_session__new() function on failure
This patch is to return error code of perf_new_session function on
failure instead of NULL.
Test Results:
Before Fix:
$ perf c2c report -input
failed to open nput: No such file or directory
$ echo $?
0
$
After Fix:
$ perf c2c report -input
failed to open nput: No such file or directory
$ echo $?
254
$
Committer notes:
Fix 'perf tests topology' case, where we use that TEST_ASSERT_VAL(...,
session), i.e. we need to pass zero in case of failure, which was the
case before when NULL was returned by perf_session__new() for failure,
but now we need to negate the result of IS_ERR(session) to respect that
TEST_ASSERT_VAL) expectation of zero meaning failure.
Reported-by: Nageswara R Sastry <rnsastry@linux.vnet.ibm.com>
Signed-off-by: Mamatha Inamdar <mamatha4@linux.vnet.ibm.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Tested-by: Nageswara R Sastry <rnsastry@linux.vnet.ibm.com>
Acked-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Reviewed-by: Jiri Olsa <jolsa@redhat.com>
Reviewed-by: Mukesh Ojha <mojha@codeaurora.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jeremie Galarneau <jeremie.galarneau@efficios.com>
Cc: Kate Stewart <kstewart@linuxfoundation.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Shawn Landden <shawn@git.icu>
Cc: Song Liu <songliubraving@fb.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tzvetomir Stoyanov <tstoyanov@vmware.com>
Link: http://lore.kernel.org/lkml/20190822071223.17892.45782.stgit@localhost.localdomain
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/builtin-kvm.c')
-rw-r--r-- | tools/perf/builtin-kvm.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c index 6e3e36658900..c4b22e1b0a40 100644 --- a/tools/perf/builtin-kvm.c +++ b/tools/perf/builtin-kvm.c @@ -33,6 +33,7 @@ #include <sys/stat.h> #include <fcntl.h> +#include <linux/err.h> #include <linux/kernel.h> #include <linux/string.h> #include <linux/time64.h> @@ -1091,9 +1092,9 @@ static int read_events(struct perf_kvm_stat *kvm) kvm->tool = eops; kvm->session = perf_session__new(&file, false, &kvm->tool); - if (!kvm->session) { + if (IS_ERR(kvm->session)) { pr_err("Initializing perf session failed\n"); - return -1; + return PTR_ERR(kvm->session); } symbol__init(&kvm->session->header.env); @@ -1446,8 +1447,8 @@ static int kvm_events_live(struct perf_kvm_stat *kvm, * perf session */ kvm->session = perf_session__new(&data, false, &kvm->tool); - if (kvm->session == NULL) { - err = -1; + if (IS_ERR(kvm->session)) { + err = PTR_ERR(kvm->session); goto out; } kvm->session->evlist = kvm->evlist; |