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[12/12] HID: i2c-hid: note that I2C xfer buffers are DMA-safe

Message ID 20220118072628.1617172-13-dmitry.torokhov@gmail.com (mailing list archive)
State New
Delegated to: Jiri Kosina
Headers show
Series i2c-hid: fixes for unnumbered reports and other improvements | expand

Commit Message

Dmitry Torokhov Jan. 18, 2022, 7:26 a.m. UTC
All I2C communications in the driver use driver-private buffers that are
DMA-safe, so mark them as such.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/hid/i2c-hid/i2c-hid-core.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)
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Patch

diff --git a/drivers/hid/i2c-hid/i2c-hid-core.c b/drivers/hid/i2c-hid/i2c-hid-core.c
index aa7c573b35bc..92dd86c42975 100644
--- a/drivers/hid/i2c-hid/i2c-hid-core.c
+++ b/drivers/hid/i2c-hid/i2c-hid-core.c
@@ -180,7 +180,7 @@  static int i2c_hid_xfer(struct i2c_hid *ihid,
 			    __func__, send_len, send_buf);
 
 		msgs[n].addr = client->addr;
-		msgs[n].flags = client->flags & I2C_M_TEN;
+		msgs[n].flags = (client->flags & I2C_M_TEN) | I2C_M_DMA_SAFE;
 		msgs[n].len = send_len;
 		msgs[n].buf = send_buf;
 		n++;
@@ -188,7 +188,8 @@  static int i2c_hid_xfer(struct i2c_hid *ihid,
 
 	if (recv_len) {
 		msgs[n].addr = client->addr;
-		msgs[n].flags = (client->flags & I2C_M_TEN) | I2C_M_RD;
+		msgs[n].flags = (client->flags & I2C_M_TEN) |
+				I2C_M_RD | I2C_M_DMA_SAFE;
 		msgs[n].len = recv_len;
 		msgs[n].buf = recv_buf;
 		n++;