[PATCH v2 4/4] i3c: mipi-i3c-hci: Use own DMA bounce buffer management for I2C transfers

[Jarkko Nikula <jarkko.nikula@linux.intel.com>]

Stop using I2C DMA-safe API for two reasons:
- Not needed if driver is using PIO mode.
- DMA transfers needs a DWORD align sized receive bounce buffer when the
  device DMA is IOMMU mapped, which is causing needless double bounce
  buffering in that case.

Cc: Billy Tsai <billy_tsai@aspeedtech.com>
Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
---
 drivers/i3c/master/mipi-i3c-hci/core.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/drivers/i3c/master/mipi-i3c-hci/core.c b/drivers/i3c/master/mipi-i3c-hci/core.c
index b2977b6ac9f7..7a467ef65787 100644
--- a/drivers/i3c/master/mipi-i3c-hci/core.c
+++ b/drivers/i3c/master/mipi-i3c-hci/core.c
@@ -348,7 +348,7 @@ static int i3c_hci_i2c_xfers(struct i2c_dev_desc *dev,
 		return -ENOMEM;
 
 	for (i = 0; i < nxfers; i++) {
-		xfer[i].data = i2c_get_dma_safe_msg_buf(&i2c_xfers[i], 1);
+		xfer[i].data = i2c_xfers[i].buf;
 		xfer[i].data_len = i2c_xfers[i].len;
 		xfer[i].rnw = i2c_xfers[i].flags & I2C_M_RD;
 		hci->cmd->prep_i2c_xfer(hci, dev, &xfer[i]);
@@ -374,10 +374,6 @@ static int i3c_hci_i2c_xfers(struct i2c_dev_desc *dev,
 	}
 
 out:
-	for (i = 0; i < nxfers; i++)
-		i2c_put_dma_safe_msg_buf(xfer[i].data, &i2c_xfers[i],
-					 ret ? false : true);
-
 	hci_free_xfer(xfer, nxfers);
 	return ret;
 }
-- 
2.47.2


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