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[v2,04/20] EDAC, mc: Do not BUG_ON() in edac_mc_alloc()

Message ID 20191106093239.25517-5-rrichter@marvell.com
State Accepted
Commit d260e8ff5195d3080cc11ae1f35cf4e6eb1a5d24
Headers show
Series EDAC: Rework edac_mc and ghes drivers | expand

Commit Message

Robert Richter Nov. 6, 2019, 9:33 a.m. UTC 
No need to crash the system in case edac_mc_alloc() is called with
invalid arguments, just warn and return. This would cause a checkpatch
warning when touching the code later, so just fix it.

Signed-off-by: Robert Richter <rrichter@marvell.com>

Reviewed-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

---
 drivers/edac/edac_mc.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

-- 
2.20.1
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Patch

diff --git a/drivers/edac/edac_mc.c b/drivers/edac/edac_mc.c
index c5240bb4c6c0..f2cbca77bc50 100644
--- a/drivers/edac/edac_mc.c
+++ b/drivers/edac/edac_mc.c
@@ -323,7 +323,9 @@  struct mem_ctl_info *edac_mc_alloc(unsigned int mc_num,
 	int i, j, row, chn, n, len;
 	bool per_rank = false;
 
-	BUG_ON(n_layers > EDAC_MAX_LAYERS || n_layers == 0);
+	if (WARN_ON(n_layers > EDAC_MAX_LAYERS || n_layers == 0))
+		return NULL;
+
 	/*
 	 * Calculate the total amount of dimms and csrows/cschannels while
 	 * in the old API emulation mode