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Subject[PATCH 05/20] platform: goldfish: pipe: Update the comment for GFP_ATOMIC
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From: Roman Kiryanov <rkir@google.com>

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

Signed-off-by: Roman Kiryanov <rkir@google.com>
---
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
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