[PATCH 05/20] platform: goldfish: pipe: Update the comment for GFP_ATOMIC

[rkir]

From: Roman Kiryanov <rkir@xxxxxxxxxx>

Provide an explanation why GFP_ATOMIC is needed to prevent changing it to
other values.

Signed-off-by: Roman Kiryanov <rkir@xxxxxxxxxx>
---
 drivers/platform/goldfish/goldfish_pipe.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/platform/goldfish/goldfish_pipe.c b/drivers/platform/goldfish/goldfish_pipe.c
index caf514aafb21..0c55e657da5a 100644
--- a/drivers/platform/goldfish/goldfish_pipe.c
+++ b/drivers/platform/goldfish/goldfish_pipe.c
@@ -640,7 +640,10 @@ static int get_free_pipe_id_locked(struct goldfish_pipe_dev *dev)
 			return id;
 
 	{
-		/* Reallocate the array */
+		/* Reallocate the array.
+		 * Since get_free_pipe_id_locked runs with interrupts disabled,
+		 * we don't want to make calls that could lead to sleep.
+		 */
 		u32 new_capacity = 2 * dev->pipes_capacity;
 		struct goldfish_pipe **pipes =
 			kcalloc(new_capacity, sizeof(*pipes), GFP_ATOMIC);
-- 
2.19.0.rc0.228.g281dcd1b4d0-goog