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([192.19.224.250]) by smtp.gmail.com with ESMTPSA id j23sm2478591pgm.76.2020.10.23.10.18.27 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 23 Oct 2020 10:18:29 -0700 (PDT) Subject: Re: [PATCH v1 2/6] i2c: iproc: handle only slave interrupts which are enabled To: Rayagonda Kokatanur , Ray Jui , Scott Branden , bcm-kernel-feedback-list@broadcom.com, Wolfram Sang , Florian Fainelli , Brendan Higgins , Andy Shevchenko , Lori Hikichi , Dhananjay Phadke , linux-i2c@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org References: <20201011182254.17776-1-rayagonda.kokatanur@broadcom.com> <20201011182254.17776-3-rayagonda.kokatanur@broadcom.com> From: Ray Jui Message-ID: Date: Fri, 23 Oct 2020 10:18:23 -0700 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.12.1 MIME-Version: 1.0 In-Reply-To: <20201011182254.17776-3-rayagonda.kokatanur@broadcom.com> Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="00000000000005fb5005b259c5e9" Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.org --00000000000005fb5005b259c5e9 Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit On 10/11/2020 11:22 AM, Rayagonda Kokatanur wrote: > Handle only slave interrupts which are enabled. > > The IS_OFFSET register contains the interrupt status bits which will be > set regardless of the enabling of the corresponding interrupt condition. > One must therefore look at both IS_OFFSET and IE_OFFSET to determine > whether an interrupt condition is set and enabled. > > Fixes: c245d94ed106 ("i2c: iproc: Add multi byte read-write support for slave mode") > Signed-off-by: Rayagonda Kokatanur > --- > drivers/i2c/busses/i2c-bcm-iproc.c | 13 +++++++++---- > 1 file changed, 9 insertions(+), 4 deletions(-) > > diff --git a/drivers/i2c/busses/i2c-bcm-iproc.c b/drivers/i2c/busses/i2c-bcm-iproc.c > index 834a98caeada..b54f5130d246 100644 > --- a/drivers/i2c/busses/i2c-bcm-iproc.c > +++ b/drivers/i2c/busses/i2c-bcm-iproc.c > @@ -507,12 +507,17 @@ static void bcm_iproc_i2c_process_m_event(struct bcm_iproc_i2c_dev *iproc_i2c, > static irqreturn_t bcm_iproc_i2c_isr(int irq, void *data) > { > struct bcm_iproc_i2c_dev *iproc_i2c = data; > - u32 status = iproc_i2c_rd_reg(iproc_i2c, IS_OFFSET); > + u32 slave_status; > + u32 status; > bool ret; > - u32 sl_status = status & ISR_MASK_SLAVE; > > - if (sl_status) { > - ret = bcm_iproc_i2c_slave_isr(iproc_i2c, sl_status); > + status = iproc_i2c_rd_reg(iproc_i2c, IS_OFFSET); > + /* process only slave interrupt which are enabled */ > + slave_status = status & iproc_i2c_rd_reg(iproc_i2c, IE_OFFSET) & > + ISR_MASK_SLAVE; > + > + if (slave_status) { > + ret = bcm_iproc_i2c_slave_isr(iproc_i2c, slave_status); > if (ret) > return IRQ_HANDLED; > else > Acked-by: Ray Jui --00000000000005fb5005b259c5e9 Content-Type: application/pkcs7-signature; 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