[PATCH] fjes: Add missing check for vzalloc

[Chen Ni]

Because of the potential failure of the vzalloc(), the hw->hw_info.trace
could be NULL.
Therefore, we need to check it and return -ENOMEM in order to transfer
the error.

Fixes: b6ba737d0b29 ("fjes: ethtool -w and -W support for fjes driver")
Signed-off-by: Chen Ni <nichen@xxxxxxxxxxx>
---
 drivers/net/fjes/fjes_hw.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/fjes/fjes_hw.c b/drivers/net/fjes/fjes_hw.c
index 704e949484d0..3a06a3cf021d 100644
--- a/drivers/net/fjes/fjes_hw.c
+++ b/drivers/net/fjes/fjes_hw.c
@@ -330,6 +330,9 @@ int fjes_hw_init(struct fjes_hw *hw)
 	ret = fjes_hw_setup(hw);
 
 	hw->hw_info.trace = vzalloc(FJES_DEBUG_BUFFER_SIZE);
+	if (!hw->hw_info.trace)
+		return -ENOMEM;
+
 	hw->hw_info.trace_size = FJES_DEBUG_BUFFER_SIZE;
 
 	return ret;
-- 
2.25.1