linux-kernel - RE: [PATCH v2] wifi: rtl8xxxu: correct the error value of 'timeout'

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Date:   Fri, 17 Nov 2023 02:53:52 +0000
From:   Ping-Ke Shih <pkshih@...ltek.com>
To:     Su Hui <suhui@...china.com>,
        "Jes.Sorensen@...il.com" <Jes.Sorensen@...il.com>
CC:     "kvalo@...nel.org" <kvalo@...nel.org>,
        "linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "kernel-janitors@...r.kernel.org" <kernel-janitors@...r.kernel.org>
Subject: RE: [PATCH v2] wifi: rtl8xxxu: correct the error value of 'timeout'



> -----Original Message-----
> From: Su Hui <suhui@...china.com>
> Sent: Wednesday, November 15, 2023 1:01 PM
> To: Ping-Ke Shih <pkshih@...ltek.com>; Jes.Sorensen@...il.com
> Cc: Su Hui <suhui@...china.com>; kvalo@...nel.org; linux-wireless@...r.kernel.org;
> linux-kernel@...r.kernel.org; kernel-janitors@...r.kernel.org
> Subject: [PATCH v2] wifi: rtl8xxxu: correct the error value of 'timeout'
> 
> When 'rtl8xxxu_dma_agg_pages <= page_thresh', 'timeout' should equal to
> 'page_thresh' rather than '4'. Change the code order to fix this problem.
> 
> Fixes: fd83f1227826 ("rtl8xxxu: gen1: Add module parameters to adjust DMA aggregation parameters")
> Signed-off-by: Su Hui <suhui@...china.com>
> ---

Checking logic of agg_pages and agg_timeout, I think we should correct it
by below changes. So, NACK this patch. 

diff --git a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
index 43ee7592bc6e..c9e227aed685 100644
--- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
+++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
@@ -4760,7 +4760,7 @@ void rtl8xxxu_gen1_init_aggregation(struct rtl8xxxu_priv *priv)
        page_thresh = (priv->fops->rx_agg_buf_size / 512);
        if (rtl8xxxu_dma_agg_pages >= 0) {
                if (rtl8xxxu_dma_agg_pages <= page_thresh)
-                       timeout = page_thresh;
+                       page_thresh = rtl8xxxu_dma_agg_pages;
                else if (rtl8xxxu_dma_agg_pages <= 6)
                        dev_err(&priv->udev->dev,
                                "%s: dma_agg_pages=%i too small, minimum is 6\n",