From: Alex Elder elder@linaro.org
[ Upstream commit 2df181f09c961377a55510a864216d48d787fe49 ]
Starting at IPA v4.11, the GSI_GENERIC_COMMAND GSI register got a new PARAMS field. The code that encodes a value into that field sets it unconditionally, which is wrong.
We currently only provide 0 as the field's value, so this error has no real effect. Still, it's a bug, so let's fix it.
Fix an (unrelated) incorrect comment as well. Fields in the ERROR_LOG GSI register actually *are* defined for IPA versions prior to v3.5.1.
Fixes: fe68c43ce388 ("net: ipa: support enhanced channel flow control") Signed-off-by: Alex Elder elder@linaro.org Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ipa/gsi.c | 3 ++- drivers/net/ipa/gsi_reg.h | 1 - 2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ipa/gsi.c b/drivers/net/ipa/gsi.c index bea2da1c4c51d..f1a3938294866 100644 --- a/drivers/net/ipa/gsi.c +++ b/drivers/net/ipa/gsi.c @@ -1666,7 +1666,8 @@ static int gsi_generic_command(struct gsi *gsi, u32 channel_id, val = u32_encode_bits(opcode, GENERIC_OPCODE_FMASK); val |= u32_encode_bits(channel_id, GENERIC_CHID_FMASK); val |= u32_encode_bits(GSI_EE_MODEM, GENERIC_EE_FMASK); - val |= u32_encode_bits(params, GENERIC_PARAMS_FMASK); + if (gsi->version >= IPA_VERSION_4_11) + val |= u32_encode_bits(params, GENERIC_PARAMS_FMASK);
timeout = !gsi_command(gsi, GSI_GENERIC_CMD_OFFSET, val);
diff --git a/drivers/net/ipa/gsi_reg.h b/drivers/net/ipa/gsi_reg.h index 3763359f208f7..e65f2f055cfff 100644 --- a/drivers/net/ipa/gsi_reg.h +++ b/drivers/net/ipa/gsi_reg.h @@ -372,7 +372,6 @@ enum gsi_general_id { #define GSI_ERROR_LOG_OFFSET \ (0x0001f200 + 0x4000 * GSI_EE_AP)
-/* Fields below are present for IPA v3.5.1 and above */ #define ERR_ARG3_FMASK GENMASK(3, 0) #define ERR_ARG2_FMASK GENMASK(7, 4) #define ERR_ARG1_FMASK GENMASK(11, 8)