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Subject[PATCH net-next v2 3/5] net: ipa: mode register is TX only
Date
The INIT_MODE endpoint configuration register is only valid for TX
endpoints. Rather than writing a zero to that register for RX
endpoints, avoid writing the register at all.

Signed-off-by: Alex Elder <elder@linaro.org>
---
v2: The commented calls to assert() that were added are now gone.

drivers/net/ipa/ipa_endpoint.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ipa/ipa_endpoint.c b/drivers/net/ipa/ipa_endpoint.c
index 1babcfc79360..566ff6a09e65 100644
--- a/drivers/net/ipa/ipa_endpoint.c
+++ b/drivers/net/ipa/ipa_endpoint.c
@@ -541,7 +541,7 @@ static void ipa_endpoint_init_mode(struct ipa_endpoint *endpoint)
u32 offset = IPA_REG_ENDP_INIT_MODE_N_OFFSET(endpoint->endpoint_id);
u32 val;

- if (endpoint->toward_ipa && endpoint->data->dma_mode) {
+ if (endpoint->data->dma_mode) {
enum ipa_endpoint_name name = endpoint->data->dma_endpoint;
u32 dma_endpoint_id;

@@ -552,7 +552,7 @@ static void ipa_endpoint_init_mode(struct ipa_endpoint *endpoint)
} else {
val = u32_encode_bits(IPA_BASIC, MODE_FMASK);
}
- /* Other bitfields unspecified (and 0) */
+ /* All other bits unspecified (and 0) */

iowrite32(val, endpoint->ipa->reg_virt + offset);
}
@@ -1297,6 +1297,7 @@ static void ipa_endpoint_program(struct ipa_endpoint *endpoint)
ipa_endpoint_init_aggr(endpoint);
ipa_endpoint_init_deaggr(endpoint);
ipa_endpoint_init_seq(endpoint);
+ ipa_endpoint_init_mode(endpoint);
} else {
if (endpoint->ipa->version == IPA_VERSION_3_5_1)
(void)ipa_endpoint_program_suspend(endpoint, false);
@@ -1306,7 +1307,6 @@ static void ipa_endpoint_program(struct ipa_endpoint *endpoint)
}
ipa_endpoint_init_cfg(endpoint);
ipa_endpoint_init_hdr(endpoint);
- ipa_endpoint_init_mode(endpoint);
ipa_endpoint_status(endpoint);
}

--
2.25.1
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