6.1-stable review patch. If anyone has any objections, please let me know.
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From: Dmitry Torokhov dmitry.torokhov@gmail.com
[ Upstream commit 17f5eebf6780eee50f887542e1833fda95f53e4d ]
Allocating a contiguous buffer of 64K may fail if memory is sufficiently fragmented, and may cause OOM kill of an unrelated process. However we do not need to have contiguous memory. We also do not need to zero out the buffer since it will be overwritten with firmware data.
Switch to using kvmalloc() instead of kzalloc().
Link: https://lore.kernel.org/r/20240609234757.610273-1-dmitry.torokhov@gmail.com Signed-off-by: Dmitry Torokhov dmitry.torokhov@gmail.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/input/touchscreen/ili210x.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/input/touchscreen/ili210x.c b/drivers/input/touchscreen/ili210x.c index e3a36cd3656c..8c8eea5173f7 100644 --- a/drivers/input/touchscreen/ili210x.c +++ b/drivers/input/touchscreen/ili210x.c @@ -586,7 +586,7 @@ static int ili251x_firmware_to_buffer(const struct firmware *fw, * once, copy them all into this buffer at the right locations, and then * do all operations on this linear buffer. */ - fw_buf = kzalloc(SZ_64K, GFP_KERNEL); + fw_buf = kvmalloc(SZ_64K, GFP_KERNEL); if (!fw_buf) return -ENOMEM;
@@ -616,7 +616,7 @@ static int ili251x_firmware_to_buffer(const struct firmware *fw, return 0;
err_big: - kfree(fw_buf); + kvfree(fw_buf); return error; }
@@ -859,7 +859,7 @@ static ssize_t ili210x_firmware_update_store(struct device *dev, ili210x_hardware_reset(priv->reset_gpio); dev_dbg(dev, "Firmware update ended, error=%i\n", error); enable_irq(client->irq); - kfree(fwbuf); + kvfree(fwbuf); return error; }