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Re: [PATCH] ath9k: wake up chip before initializing PAPRD table

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On Tuesday 24 May 2011 11:50 AM, Senthilkumar Balasubramanian wrote:
On Tue, May 24, 2011 at 10:31:03AM +0530, Mohammed Shafi Shajakhan wrote:
From: Mohammed Shafi Shajakhan<mshajakhan@xxxxxxxxxxx>

in PAPRD table initialization path we have register read. so make sure
that the chip is awake. currently PAPRD is disabled.

Signed-off-by: Mohammed Shafi Shajakhan<mshajakhan@xxxxxxxxxxx>
---
  drivers/net/wireless/ath/ath9k/main.c |    3 ++-
  1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index a198ee3..af8aa9e 100644
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -394,6 +394,8 @@ void ath_paprd_calibrate(struct work_struct *work)
  	if (!caldata)
  		return;

+	ath9k_ps_wakeup(sc);
+
  	if (ar9003_paprd_init_table(ah)<  0)
  		return;
Have you tested power save with this patch? ps_restore is missing here...

Sorry Senthil and thanks for pointing it out, it would have introduced a serious regression in Power Save when the device is in idle state(when PAPRD enabled) and when it just returns from as we are never doing power save restore

  if (ar9003_paprd_init_table(ah) < 0)
                return;

I will fix it properly by using goto fail_paprd as you had suggested.


@@ -411,7 +413,6 @@ void ath_paprd_calibrate(struct work_struct *work)
  	memcpy(hdr->addr2, hw->wiphy->perm_addr, ETH_ALEN);
  	memcpy(hdr->addr3, hw->wiphy->perm_addr, ETH_ALEN);

-	ath9k_ps_wakeup(sc);
  	for (chain = 0; chain<  AR9300_MAX_CHAINS; chain++) {
  		if (!(common->tx_chainmask&  BIT(chain)))
  			continue;
--
1.7.0.4

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--
thanks,
shafi
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