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Mon, 19 Apr 2021 06:36:41 -0700 (PDT) Sender: Guenter Roeck Subject: Re: [RFC v1 PATCH 3/3] driver: update all the code that use soc_device_match To: "Alice Guo (OSS)" , gregkh@linuxfoundation.org, rafael@kernel.org, horia.geanta@nxp.com, aymen.sghaier@nxp.com, herbert@gondor.apana.org.au, davem@davemloft.net, tony@atomide.com, geert+renesas@glider.be, mturquette@baylibre.com, sboyd@kernel.org, vkoul@kernel.org, peter.ujfalusi@gmail.com, a.hajda@samsung.com, narmstrong@baylibre.com, robert.foss@linaro.org, airlied@linux.ie, daniel@ffwll.ch, khilman@baylibre.com, tomba@kernel.org, jyri.sarha@iki.fi, joro@8bytes.org, will@kernel.org, mchehab@kernel.org, ulf.hansson@linaro.org, adrian.hunter@intel.com, kishon@ti.com, kuba@kernel.org, linus.walleij@linaro.org, Roy.Pledge@nxp.com, leoyang.li@nxp.com, ssantosh@kernel.org, matthias.bgg@gmail.com, edubezval@gmail.com, j-keerthy@ti.com, balbi@kernel.org, linux@prisktech.co.nz, stern@rowland.harvard.edu, wim@linux-watchdog.org Cc: linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org, linux-omap@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-clk@vger.kernel.org, dmaengine@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-amlogic@lists.infradead.org, linux-arm-kernel@lists.infradead.org, iommu@lists.linux-foundation.org, linux-media@vger.kernel.org, linux-mmc@vger.kernel.org, netdev@vger.kernel.org, linux-phy@lists.infradead.org, linux-gpio@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-staging@lists.linux.dev, linux-mediatek@lists.infradead.org, linux-pm@vger.kernel.org, linux-usb@vger.kernel.org, linux-watchdog@vger.kernel.org References: <20210419042722.27554-1-alice.guo@oss.nxp.com> <20210419042722.27554-4-alice.guo@oss.nxp.com> From: Guenter Roeck Autocrypt: addr=linux@roeck-us.net; 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Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <20210419042722.27554-4-alice.guo@oss.nxp.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org On 4/18/21 9:27 PM, Alice Guo (OSS) wrote: > From: Alice Guo > > Update all the code that use soc_device_match because add support for > soc_device_match returning -EPROBE_DEFER. > > Signed-off-by: Alice Guo > --- [ ... ] > drivers/watchdog/renesas_wdt.c | 2 +- > 48 files changed, 131 insertions(+), 52 deletions(-) > [ ... ] > diff --git a/drivers/watchdog/renesas_wdt.c b/drivers/watchdog/renesas_wdt.c > index 5791198960e6..fdc534dc4024 100644 > --- a/drivers/watchdog/renesas_wdt.c > +++ b/drivers/watchdog/renesas_wdt.c > @@ -197,7 +197,7 @@ static bool rwdt_blacklisted(struct device *dev) > const struct soc_device_attribute *attr; > > attr = soc_device_match(rwdt_quirks_match); > - if (attr && setup_max_cpus > (uintptr_t)attr->data) { > + if (!IS_ERR(attr) && attr && setup_max_cpus > (uintptr_t)attr->data) { This is wrong. We can not make the decision below without having access to attr. The function may wrongly return false if soc_device_match() returns an error. Guenter > dev_info(dev, "Watchdog blacklisted on %s %s\n", attr->soc_id, > attr->revision); > return true; >