[PATCH net 0/2] More fixes for the IPA driver

[PATCH net 0/2] More fixes for the IPA driver

[Luca Weiss]

Two more fixes for the Qualcomm IPA driver.

Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
---
Luca Weiss (2):
      net: ipa: Fix programming of QTIME_TIMESTAMP_CFG
      net: ipa: Fix decoding EV_PER_EE for IPA v5.0+

 drivers/net/ipa/gsi.c      | 1 +
 drivers/net/ipa/ipa_main.c | 6 +++---
 2 files changed, 4 insertions(+), 3 deletions(-)
---
base-commit: 56007972c0b1e783ca714d6f1f4d6e66e531d21f
change-id: 20260409-ipa-fixes-a575cf2810df

Best regards,
--  
Luca Weiss <luca.weiss@fairphone.com>

[PATCH net 1/2] net: ipa: Fix programming of QTIME_TIMESTAMP_CFG

[Luca Weiss]

The 'val' variable gets overwritten multiple times, discarding previous
values. Looking at the git log shows these should be combined with |=
instead.

Fixes: 9265a4f0f0b4 ("net: ipa: define even more IPA register fields")
Link: https://sashiko.dev/#/patchset/20260403-milos-ipa-v1-0-01e9e4e03d3e%40fairphone.com?part=4
Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
---
 drivers/net/ipa/ipa_main.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ipa/ipa_main.c b/drivers/net/ipa/ipa_main.c
index edead9c48d1f..216506eeef1f 100644
--- a/drivers/net/ipa/ipa_main.c
+++ b/drivers/net/ipa/ipa_main.c
@@ -361,7 +361,7 @@ static void ipa_qtime_config(struct ipa *ipa)
 {
 	const struct reg *reg;
 	u32 offset;
-	u32 val;
+	u32 val = 0;
 
 	/* Timer clock divider must be disabled when we change the rate */
 	reg = ipa_reg(ipa, TIMERS_XO_CLK_DIV_CFG);
@@ -374,8 +374,8 @@ static void ipa_qtime_config(struct ipa *ipa)
 		val |= reg_bit(reg, DPL_TIMESTAMP_SEL);
 	}
 	/* Configure tag and NAT Qtime timestamp resolution as well */
-	val = reg_encode(reg, TAG_TIMESTAMP_LSB, TAG_TIMESTAMP_SHIFT);
-	val = reg_encode(reg, NAT_TIMESTAMP_LSB, NAT_TIMESTAMP_SHIFT);
+	val |= reg_encode(reg, TAG_TIMESTAMP_LSB, TAG_TIMESTAMP_SHIFT);
+	val |= reg_encode(reg, NAT_TIMESTAMP_LSB, NAT_TIMESTAMP_SHIFT);
 
 	iowrite32(val, ipa->reg_virt + reg_offset(reg));
 

-- 
2.53.0

[PATCH net 2/2] net: ipa: Fix decoding EV_PER_EE for IPA v5.0+

[Luca Weiss]

Initially 'reg' and 'val' are assigned from HW_PARAM_2.

But since IPA v5.0+ takes EV_PER_EE from HW_PARAM_4 (instead of
NUM_EV_PER_EE from HW_PARAM_2), we not only need to re-assign 'reg' but
also read the register value of that register into 'val' so that
reg_decode() works on the correct value.

Fixes: f651334e1ef5 ("net: ipa: add HW_PARAM_4 GSI register")
Link: https://sashiko.dev/#/patchset/20260403-milos-ipa-v1-0-01e9e4e03d3e%40fairphone.com?part=2
Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
---
 drivers/net/ipa/gsi.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ipa/gsi.c b/drivers/net/ipa/gsi.c
index 4c3227e77898..624649484d62 100644
--- a/drivers/net/ipa/gsi.c
+++ b/drivers/net/ipa/gsi.c
@@ -2044,6 +2044,7 @@ static int gsi_ring_setup(struct gsi *gsi)
 		count = reg_decode(reg, NUM_EV_PER_EE, val);
 	} else {
 		reg = gsi_reg(gsi, HW_PARAM_4);
+		val = ioread32(gsi->virt + reg_offset(reg));
 		count = reg_decode(reg, EV_PER_EE, val);
 	}
 	if (!count) {

-- 
2.53.0

Re: [PATCH net 1/2] net: ipa: Fix programming of QTIME_TIMESTAMP_CFG

[Konrad Dybcio]

On 4/9/26 10:13 AM, Luca Weiss wrote:
> The 'val' variable gets overwritten multiple times, discarding previous
> values. Looking at the git log shows these should be combined with |=
> instead.
> 
> Fixes: 9265a4f0f0b4 ("net: ipa: define even more IPA register fields")
> Link: https://sashiko.dev/#/patchset/20260403-milos-ipa-v1-0-01e9e4e03d3e%40fairphone.com?part=4
> Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
> ---

Ha, nice!

Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>

Konrad

Re: [PATCH net 2/2] net: ipa: Fix decoding EV_PER_EE for IPA v5.0+

[Konrad Dybcio]

On 4/9/26 10:13 AM, Luca Weiss wrote:
> Initially 'reg' and 'val' are assigned from HW_PARAM_2.
> 
> But since IPA v5.0+ takes EV_PER_EE from HW_PARAM_4 (instead of
> NUM_EV_PER_EE from HW_PARAM_2), we not only need to re-assign 'reg' but
> also read the register value of that register into 'val' so that
> reg_decode() works on the correct value.
> 
> Fixes: f651334e1ef5 ("net: ipa: add HW_PARAM_4 GSI register")
> Link: https://sashiko.dev/#/patchset/20260403-milos-ipa-v1-0-01e9e4e03d3e%40fairphone.com?part=2
> Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
> ---

Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>

Konrad

Re: [PATCH net 0/2] More fixes for the IPA driver

[patchwork-bot+netdevbpf]

Hello:

This series was applied to netdev/net.git (main)
by Jakub Kicinski <kuba@kernel.org>:

On Thu, 09 Apr 2026 10:13:30 +0200 you wrote:
> Two more fixes for the Qualcomm IPA driver.
> 
> Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
> ---
> Luca Weiss (2):
>       net: ipa: Fix programming of QTIME_TIMESTAMP_CFG
>       net: ipa: Fix decoding EV_PER_EE for IPA v5.0+
> 
> [...]

Here is the summary with links:
  - [net,1/2] net: ipa: Fix programming of QTIME_TIMESTAMP_CFG
    https://git.kernel.org/netdev/net/c/de08f9585692
  - [net,2/2] net: ipa: Fix decoding EV_PER_EE for IPA v5.0+
    https://git.kernel.org/netdev/net/c/1335b903cf2e

You are awesome, thank you!
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