Re: [PATCH] i2c: tegra-bpmp: ignore DMA safe buffer flag

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On 1/11/21 5:04 PM, Ben Dooks wrote:
On 11/01/2021 14:27, Mikko Perttunen wrote:
From: Muhammed Fazal <mfazale@xxxxxxxxxx>

Ignore I2C_M_DMA_SAFE flag as it does not make a difference
for bpmp-i2c, but causes -EINVAL to be returned for valid
transactions.

Signed-off-by: Muhammed Fazal <mfazale@xxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx # v4.19+
Signed-off-by: Mikko Perttunen <mperttunen@xxxxxxxxxx>
---
This fixes failures seen with PMIC probing tools on
Tegra186+ boards.

  drivers/i2c/busses/i2c-tegra-bpmp.c | 3 +++
  1 file changed, 3 insertions(+)

diff --git a/drivers/i2c/busses/i2c-tegra-bpmp.c b/drivers/i2c/busses/i2c-tegra-bpmp.c
index ec7a7e917edd..998d4b21fb59 100644
--- a/drivers/i2c/busses/i2c-tegra-bpmp.c
+++ b/drivers/i2c/busses/i2c-tegra-bpmp.c
@@ -80,6 +80,9 @@ static int tegra_bpmp_xlate_flags(u16 flags, u16 *out)
          flags &= ~I2C_M_RECV_LEN;
      }
+    if (flags & I2C_M_DMA_SAFE)
+        flags &= ~I2C_M_DMA_SAFE;
+

Just a comment, you can do without the test here.
Just doing this would have been fine:

     flags &= ~I2C_M_DMA_SAFE;




Yep, I'll send a v2.

thanks,
Mikko



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