[PATCH] mmc: meson-gx: fix SDIO mode if cap_sdio_irq isn't set

[PATCH] mmc: meson-gx: fix SDIO mode if cap_sdio_irq isn't set

[Heiner Kallweit]

Some SDIO WiFi modules stopped working after SDIO interrupt mode
was added if cap_sdio_irq isn't set in device tree. This patch was
confirmed to fix the issue.

Fixes: 066ecde6d826 ("mmc: meson-gx: add SDIO interrupt support")
Reported-by: Geraldo Nascimento <geraldogabriel@gmail.com>
Tested-by: Geraldo Nascimento <geraldogabriel@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
---
 drivers/mmc/host/meson-gx-mmc.c | 21 ++++++++++++---------
 1 file changed, 12 insertions(+), 9 deletions(-)

diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
index 6e5ea0213..a80d48d23 100644
--- a/drivers/mmc/host/meson-gx-mmc.c
+++ b/drivers/mmc/host/meson-gx-mmc.c
@@ -435,7 +435,8 @@ static int meson_mmc_clk_init(struct meson_host *host)
 	clk_reg |= FIELD_PREP(CLK_CORE_PHASE_MASK, CLK_PHASE_180);
 	clk_reg |= FIELD_PREP(CLK_TX_PHASE_MASK, CLK_PHASE_0);
 	clk_reg |= FIELD_PREP(CLK_RX_PHASE_MASK, CLK_PHASE_0);
-	clk_reg |= CLK_IRQ_SDIO_SLEEP(host);
+	if (host->mmc->caps & MMC_CAP_SDIO_IRQ)
+		clk_reg |= CLK_IRQ_SDIO_SLEEP(host);
 	writel(clk_reg, host->regs + SD_EMMC_CLOCK);
 
 	/* get the mux parents */
@@ -948,16 +949,18 @@ static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
 {
 	struct meson_host *host = dev_id;
 	struct mmc_command *cmd;
-	u32 status, raw_status;
+	u32 status, raw_status, irq_mask = IRQ_EN_MASK;
 	irqreturn_t ret = IRQ_NONE;
 
+	if (host->mmc->caps & MMC_CAP_SDIO_IRQ)
+		irq_mask |= IRQ_SDIO;
 	raw_status = readl(host->regs + SD_EMMC_STATUS);
-	status = raw_status & (IRQ_EN_MASK | IRQ_SDIO);
+	status = raw_status & irq_mask;
 
 	if (!status) {
 		dev_dbg(host->dev,
 			"Unexpected IRQ! irq_en 0x%08lx - status 0x%08x\n",
-			 IRQ_EN_MASK | IRQ_SDIO, raw_status);
+			 irq_mask, raw_status);
 		return IRQ_NONE;
 	}
 
@@ -1204,6 +1207,11 @@ static int meson_mmc_probe(struct platform_device *pdev)
 		goto free_host;
 	}
 
+	mmc->caps |= MMC_CAP_CMD23;
+
+	if (mmc->caps & MMC_CAP_SDIO_IRQ)
+		mmc->caps2 |= MMC_CAP2_SDIO_IRQ_NOTHREAD;
+
 	host->data = (struct meson_mmc_data *)
 		of_device_get_match_data(&pdev->dev);
 	if (!host->data) {
@@ -1277,11 +1285,6 @@ static int meson_mmc_probe(struct platform_device *pdev)
 
 	spin_lock_init(&host->lock);
 
-	mmc->caps |= MMC_CAP_CMD23;
-
-	if (mmc->caps & MMC_CAP_SDIO_IRQ)
-		mmc->caps2 |= MMC_CAP2_SDIO_IRQ_NOTHREAD;
-
 	if (host->dram_access_quirk) {
 		/* Limit segments to 1 due to low available sram memory */
 		mmc->max_segs = 1;
-- 
2.39.1


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Re: [PATCH] mmc: meson-gx: fix SDIO mode if cap_sdio_irq isn't set

[Geraldo Nascimento]

On Sun, Feb 12, 2023 at 10:54:25PM +0100, Heiner Kallweit wrote:
> Some SDIO WiFi modules stopped working after SDIO interrupt mode
> was added if cap_sdio_irq isn't set in device tree. This patch was
> confirmed to fix the issue.

Hi Heiner,

with this patch, with cap-sdio-irq set or unset in the DT, it doesn't
matter, I get the following warning on dmesg:

meson-gx-mmc d0070000.mmc: unaligned sg offset 3148, disabling descriptor DMA for transfer

The offset number varies between reboots.

Is that to be expected?

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Re: [PATCH] mmc: meson-gx: fix SDIO mode if cap_sdio_irq isn't set

[Heiner Kallweit]

On 12.02.2023 23:38, Geraldo Nascimento wrote:
> On Sun, Feb 12, 2023 at 10:54:25PM +0100, Heiner Kallweit wrote:
>> Some SDIO WiFi modules stopped working after SDIO interrupt mode
>> was added if cap_sdio_irq isn't set in device tree. This patch was
>> confirmed to fix the issue.
> 
> Hi Heiner,
> 
> with this patch, with cap-sdio-irq set or unset in the DT, it doesn't
> matter, I get the following warning on dmesg:
> 
> meson-gx-mmc d0070000.mmc: unaligned sg offset 3148, disabling descriptor DMA for transfer
> 
> The offset number varies between reboots.
> 
> Is that to be expected?

It's a known issue that ath10k may pass buffers to meson-gx-mmc that don't meet
the meson alignment requirement. See here:
https://lore.kernel.org/linux-arm-kernel/CAFBinCCN88nfSnmPoFq4H_ROWFMbq=Kcpr1W6CpNs58XeHtV2w@mail.gmail.com/T/
This means there's nothing wrong with the SDIO IRQ fix.


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Re: [PATCH] mmc: meson-gx: fix SDIO mode if cap_sdio_irq isn't set

[kernel test robot]

Hi Heiner,

I love your patch! Perhaps something to improve:

[auto build test WARNING on linus/master]
[also build test WARNING on v6.2-rc8 next-20230210]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Heiner-Kallweit/mmc-meson-gx-fix-SDIO-mode-if-cap_sdio_irq-isn-t-set/20230213-055650
patch link:    https://lore.kernel.org/r/9e296859-0363-ecc4-2d99-fd0239efceff%40gmail.com
patch subject: [PATCH] mmc: meson-gx: fix SDIO mode if cap_sdio_irq isn't set
config: alpha-allyesconfig (https://download.01.org/0day-ci/archive/20230213/202302130854.oj1Vrs2F-lkp@intel.com/config)
compiler: alpha-linux-gcc (GCC) 12.1.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/intel-lab-lkp/linux/commit/6aca20b626a6d75b5d74fc4441cdd99ff3252b23
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Heiner-Kallweit/mmc-meson-gx-fix-SDIO-mode-if-cap_sdio_irq-isn-t-set/20230213-055650
        git checkout 6aca20b626a6d75b5d74fc4441cdd99ff3252b23
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=alpha olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=alpha SHELL=/bin/bash drivers/mmc/host/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202302130854.oj1Vrs2F-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from include/linux/printk.h:566,
                    from include/linux/kernel.h:29,
                    from drivers/mmc/host/meson-gx-mmc.c:8:
   drivers/mmc/host/meson-gx-mmc.c: In function 'meson_mmc_irq':
>> drivers/mmc/host/meson-gx-mmc.c:962:25: warning: format '%lx' expects argument of type 'long unsigned int', but argument 4 has type 'u32' {aka 'unsigned int'} [-Wformat=]
     962 |                         "Unexpected IRQ! irq_en 0x%08lx - status 0x%08x\n",
         |                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/dynamic_debug.h:223:29: note: in definition of macro '__dynamic_func_call_cls'
     223 |                 func(&id, ##__VA_ARGS__);                       \
         |                             ^~~~~~~~~~~
   include/linux/dynamic_debug.h:249:9: note: in expansion of macro '_dynamic_func_call_cls'
     249 |         _dynamic_func_call_cls(_DPRINTK_CLASS_DFLT, fmt, func, ##__VA_ARGS__)
         |         ^~~~~~~~~~~~~~~~~~~~~~
   include/linux/dynamic_debug.h:272:9: note: in expansion of macro '_dynamic_func_call'
     272 |         _dynamic_func_call(fmt, __dynamic_dev_dbg,              \
         |         ^~~~~~~~~~~~~~~~~~
   include/linux/dev_printk.h:155:9: note: in expansion of macro 'dynamic_dev_dbg'
     155 |         dynamic_dev_dbg(dev, dev_fmt(fmt), ##__VA_ARGS__)
         |         ^~~~~~~~~~~~~~~
   include/linux/dev_printk.h:155:30: note: in expansion of macro 'dev_fmt'
     155 |         dynamic_dev_dbg(dev, dev_fmt(fmt), ##__VA_ARGS__)
         |                              ^~~~~~~
   drivers/mmc/host/meson-gx-mmc.c:961:17: note: in expansion of macro 'dev_dbg'
     961 |                 dev_dbg(host->dev,
         |                 ^~~~~~~
   drivers/mmc/host/meson-gx-mmc.c:962:55: note: format string is defined here
     962 |                         "Unexpected IRQ! irq_en 0x%08lx - status 0x%08x\n",
         |                                                   ~~~~^
         |                                                       |
         |                                                       long unsigned int
         |                                                   %08x


vim +962 drivers/mmc/host/meson-gx-mmc.c

066ecde6d826b4 Heiner Kallweit     2022-08-25   947  
51c5d8447bd71b Kevin Hilman        2016-10-19   948  static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
51c5d8447bd71b Kevin Hilman        2016-10-19   949  {
51c5d8447bd71b Kevin Hilman        2016-10-19   950  	struct meson_host *host = dev_id;
19a91dd4e39e75 Heinrich Schuchardt 2016-12-23   951  	struct mmc_command *cmd;
6aca20b626a6d7 Heiner Kallweit     2023-02-12   952  	u32 status, raw_status, irq_mask = IRQ_EN_MASK;
74858655cbff05 Jerome Brunet       2017-08-28   953  	irqreturn_t ret = IRQ_NONE;
51c5d8447bd71b Kevin Hilman        2016-10-19   954  
6aca20b626a6d7 Heiner Kallweit     2023-02-12   955  	if (host->mmc->caps & MMC_CAP_SDIO_IRQ)
6aca20b626a6d7 Heiner Kallweit     2023-02-12   956  		irq_mask |= IRQ_SDIO;
18f92bc02f1739 Jerome Brunet       2018-12-06   957  	raw_status = readl(host->regs + SD_EMMC_STATUS);
6aca20b626a6d7 Heiner Kallweit     2023-02-12   958  	status = raw_status & irq_mask;
18f92bc02f1739 Jerome Brunet       2018-12-06   959  
18f92bc02f1739 Jerome Brunet       2018-12-06   960  	if (!status) {
18f92bc02f1739 Jerome Brunet       2018-12-06   961  		dev_dbg(host->dev,
6f6fac8af6be0f Heiner Kallweit     2022-08-25  @962  			"Unexpected IRQ! irq_en 0x%08lx - status 0x%08x\n",
6aca20b626a6d7 Heiner Kallweit     2023-02-12   963  			 irq_mask, raw_status);
18f92bc02f1739 Jerome Brunet       2018-12-06   964  		return IRQ_NONE;
18f92bc02f1739 Jerome Brunet       2018-12-06   965  	}
18f92bc02f1739 Jerome Brunet       2018-12-06   966  
066ecde6d826b4 Heiner Kallweit     2022-08-25   967  	if (WARN_ON(!host))
51c5d8447bd71b Kevin Hilman        2016-10-19   968  		return IRQ_NONE;
51c5d8447bd71b Kevin Hilman        2016-10-19   969  
c2c1e63a80d6e9 Jerome Brunet       2019-05-23   970  	/* ack all raised interrupts */
c2c1e63a80d6e9 Jerome Brunet       2019-05-23   971  	writel(status, host->regs + SD_EMMC_STATUS);
c2c1e63a80d6e9 Jerome Brunet       2019-05-23   972  
74858655cbff05 Jerome Brunet       2017-08-28   973  	cmd = host->cmd;
066ecde6d826b4 Heiner Kallweit     2022-08-25   974  
066ecde6d826b4 Heiner Kallweit     2022-08-25   975  	if (status & IRQ_SDIO) {
066ecde6d826b4 Heiner Kallweit     2022-08-25   976  		spin_lock(&host->lock);
066ecde6d826b4 Heiner Kallweit     2022-08-25   977  		__meson_mmc_enable_sdio_irq(host->mmc, 0);
066ecde6d826b4 Heiner Kallweit     2022-08-25   978  		sdio_signal_irq(host->mmc);
066ecde6d826b4 Heiner Kallweit     2022-08-25   979  		spin_unlock(&host->lock);
066ecde6d826b4 Heiner Kallweit     2022-08-25   980  		status &= ~IRQ_SDIO;
066ecde6d826b4 Heiner Kallweit     2022-08-25   981  		if (!status)
066ecde6d826b4 Heiner Kallweit     2022-08-25   982  			return IRQ_HANDLED;
066ecde6d826b4 Heiner Kallweit     2022-08-25   983  	}
066ecde6d826b4 Heiner Kallweit     2022-08-25   984  
066ecde6d826b4 Heiner Kallweit     2022-08-25   985  	if (WARN_ON(!cmd))
066ecde6d826b4 Heiner Kallweit     2022-08-25   986  		return IRQ_NONE;
066ecde6d826b4 Heiner Kallweit     2022-08-25   987  
51c5d8447bd71b Kevin Hilman        2016-10-19   988  	cmd->error = 0;
74858655cbff05 Jerome Brunet       2017-08-28   989  	if (status & IRQ_CRC_ERR) {
74858655cbff05 Jerome Brunet       2017-08-28   990  		dev_dbg(host->dev, "CRC Error - status 0x%08x\n", status);
51c5d8447bd71b Kevin Hilman        2016-10-19   991  		cmd->error = -EILSEQ;
18f92bc02f1739 Jerome Brunet       2018-12-06   992  		ret = IRQ_WAKE_THREAD;
74858655cbff05 Jerome Brunet       2017-08-28   993  		goto out;
51c5d8447bd71b Kevin Hilman        2016-10-19   994  	}
74858655cbff05 Jerome Brunet       2017-08-28   995  
74858655cbff05 Jerome Brunet       2017-08-28   996  	if (status & IRQ_TIMEOUTS) {
74858655cbff05 Jerome Brunet       2017-08-28   997  		dev_dbg(host->dev, "Timeout - status 0x%08x\n", status);
51c5d8447bd71b Kevin Hilman        2016-10-19   998  		cmd->error = -ETIMEDOUT;
18f92bc02f1739 Jerome Brunet       2018-12-06   999  		ret = IRQ_WAKE_THREAD;
74858655cbff05 Jerome Brunet       2017-08-28  1000  		goto out;
51c5d8447bd71b Kevin Hilman        2016-10-19  1001  	}
74858655cbff05 Jerome Brunet       2017-08-28  1002  
74858655cbff05 Jerome Brunet       2017-08-28  1003  	meson_mmc_read_resp(host->mmc, cmd);
74858655cbff05 Jerome Brunet       2017-08-28  1004  
2c8d96a46dfd45 Heiner Kallweit     2017-03-22  1005  	if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
066ecde6d826b4 Heiner Kallweit     2022-08-25  1006  		struct mmc_data *data = cmd->data;
066ecde6d826b4 Heiner Kallweit     2022-08-25  1007  
2c8d96a46dfd45 Heiner Kallweit     2017-03-22  1008  		if (data && !cmd->error)
2c8d96a46dfd45 Heiner Kallweit     2017-03-22  1009  			data->bytes_xfered = data->blksz * data->blocks;
79ed05e329c34c Heiner Kallweit     2017-04-07  1010  		if (meson_mmc_bounce_buf_read(data) ||
79ed05e329c34c Heiner Kallweit     2017-04-07  1011  		    meson_mmc_get_next_command(cmd))
51c5d8447bd71b Kevin Hilman        2016-10-19  1012  			ret = IRQ_WAKE_THREAD;
74858655cbff05 Jerome Brunet       2017-08-28  1013  		else
74858655cbff05 Jerome Brunet       2017-08-28  1014  			ret = IRQ_HANDLED;
51c5d8447bd71b Kevin Hilman        2016-10-19  1015  	}
51c5d8447bd71b Kevin Hilman        2016-10-19  1016  
51c5d8447bd71b Kevin Hilman        2016-10-19  1017  out:
18f92bc02f1739 Jerome Brunet       2018-12-06  1018  	if (cmd->error) {
18f92bc02f1739 Jerome Brunet       2018-12-06  1019  		/* Stop desc in case of errors */
18f92bc02f1739 Jerome Brunet       2018-12-06  1020  		u32 start = readl(host->regs + SD_EMMC_START);
18f92bc02f1739 Jerome Brunet       2018-12-06  1021  
18f92bc02f1739 Jerome Brunet       2018-12-06  1022  		start &= ~START_DESC_BUSY;
18f92bc02f1739 Jerome Brunet       2018-12-06  1023  		writel(start, host->regs + SD_EMMC_START);
18f92bc02f1739 Jerome Brunet       2018-12-06  1024  	}
18f92bc02f1739 Jerome Brunet       2018-12-06  1025  
1f8066d90739eb Heiner Kallweit     2017-03-22  1026  	if (ret == IRQ_HANDLED)
51c5d8447bd71b Kevin Hilman        2016-10-19  1027  		meson_mmc_request_done(host->mmc, cmd->mrq);
51c5d8447bd71b Kevin Hilman        2016-10-19  1028  
51c5d8447bd71b Kevin Hilman        2016-10-19  1029  	return ret;
51c5d8447bd71b Kevin Hilman        2016-10-19  1030  }
51c5d8447bd71b Kevin Hilman        2016-10-19  1031  

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests

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Re: [PATCH] mmc: meson-gx: fix SDIO mode if cap_sdio_irq isn't set

[kernel test robot]

Hi Heiner,

I love your patch! Perhaps something to improve:

[auto build test WARNING on linus/master]
[also build test WARNING on v6.2-rc8 next-20230210]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Heiner-Kallweit/mmc-meson-gx-fix-SDIO-mode-if-cap_sdio_irq-isn-t-set/20230213-055650
patch link:    https://lore.kernel.org/r/9e296859-0363-ecc4-2d99-fd0239efceff%40gmail.com
patch subject: [PATCH] mmc: meson-gx: fix SDIO mode if cap_sdio_irq isn't set
config: arm64-buildonly-randconfig-r006-20230213 (https://download.01.org/0day-ci/archive/20230213/202302130924.CSStKyHP-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project db0e6591612b53910a1b366863348bdb9d7d2fb1)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install arm64 cross compiling tool for clang build
        # apt-get install binutils-aarch64-linux-gnu
        # https://github.com/intel-lab-lkp/linux/commit/6aca20b626a6d75b5d74fc4441cdd99ff3252b23
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Heiner-Kallweit/mmc-meson-gx-fix-SDIO-mode-if-cap_sdio_irq-isn-t-set/20230213-055650
        git checkout 6aca20b626a6d75b5d74fc4441cdd99ff3252b23
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash drivers/mmc/host/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202302130924.CSStKyHP-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/mmc/host/meson-gx-mmc.c:963:5: warning: format specifies type 'unsigned long' but the argument has type 'u32' (aka 'unsigned int') [-Wformat]
                            irq_mask, raw_status);
                            ^~~~~~~~
   include/linux/dev_printk.h:163:47: note: expanded from macro 'dev_dbg'
                   dev_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__); \
                                                       ~~~     ^~~~~~~~~~~
   include/linux/dev_printk.h:129:34: note: expanded from macro 'dev_printk'
                   _dev_printk(level, dev, fmt, ##__VA_ARGS__);            \
                                           ~~~    ^~~~~~~~~~~
   1 warning generated.


vim +963 drivers/mmc/host/meson-gx-mmc.c

   947	
   948	static irqreturn_t meson_mmc_irq(int irq, void *dev_id)
   949	{
   950		struct meson_host *host = dev_id;
   951		struct mmc_command *cmd;
   952		u32 status, raw_status, irq_mask = IRQ_EN_MASK;
   953		irqreturn_t ret = IRQ_NONE;
   954	
   955		if (host->mmc->caps & MMC_CAP_SDIO_IRQ)
   956			irq_mask |= IRQ_SDIO;
   957		raw_status = readl(host->regs + SD_EMMC_STATUS);
   958		status = raw_status & irq_mask;
   959	
   960		if (!status) {
   961			dev_dbg(host->dev,
   962				"Unexpected IRQ! irq_en 0x%08lx - status 0x%08x\n",
 > 963				 irq_mask, raw_status);
   964			return IRQ_NONE;
   965		}
   966	
   967		if (WARN_ON(!host))
   968			return IRQ_NONE;
   969	
   970		/* ack all raised interrupts */
   971		writel(status, host->regs + SD_EMMC_STATUS);
   972	
   973		cmd = host->cmd;
   974	
   975		if (status & IRQ_SDIO) {
   976			spin_lock(&host->lock);
   977			__meson_mmc_enable_sdio_irq(host->mmc, 0);
   978			sdio_signal_irq(host->mmc);
   979			spin_unlock(&host->lock);
   980			status &= ~IRQ_SDIO;
   981			if (!status)
   982				return IRQ_HANDLED;
   983		}
   984	
   985		if (WARN_ON(!cmd))
   986			return IRQ_NONE;
   987	
   988		cmd->error = 0;
   989		if (status & IRQ_CRC_ERR) {
   990			dev_dbg(host->dev, "CRC Error - status 0x%08x\n", status);
   991			cmd->error = -EILSEQ;
   992			ret = IRQ_WAKE_THREAD;
   993			goto out;
   994		}
   995	
   996		if (status & IRQ_TIMEOUTS) {
   997			dev_dbg(host->dev, "Timeout - status 0x%08x\n", status);
   998			cmd->error = -ETIMEDOUT;
   999			ret = IRQ_WAKE_THREAD;
  1000			goto out;
  1001		}
  1002	
  1003		meson_mmc_read_resp(host->mmc, cmd);
  1004	
  1005		if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
  1006			struct mmc_data *data = cmd->data;
  1007	
  1008			if (data && !cmd->error)
  1009				data->bytes_xfered = data->blksz * data->blocks;
  1010			if (meson_mmc_bounce_buf_read(data) ||
  1011			    meson_mmc_get_next_command(cmd))
  1012				ret = IRQ_WAKE_THREAD;
  1013			else
  1014				ret = IRQ_HANDLED;
  1015		}
  1016	
  1017	out:
  1018		if (cmd->error) {
  1019			/* Stop desc in case of errors */
  1020			u32 start = readl(host->regs + SD_EMMC_START);
  1021	
  1022			start &= ~START_DESC_BUSY;
  1023			writel(start, host->regs + SD_EMMC_START);
  1024		}
  1025	
  1026		if (ret == IRQ_HANDLED)
  1027			meson_mmc_request_done(host->mmc, cmd->mrq);
  1028	
  1029		return ret;
  1030	}
  1031	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests

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