diff mbox series

Input: HID-rmi - ignore to rmi_hid_read_block after system resumes.

Message ID 1659336403-2546-1-git-send-email-marge.yang@synaptics.corp-partner.google.com
State New
Headers show
Series Input: HID-rmi - ignore to rmi_hid_read_block after system resumes. | expand

Commit Message

margeyang Aug. 1, 2022, 6:46 a.m. UTC 
From: Marge Yang <marge.yang@synaptics.corp-partner.google.com>

ignore to rmi_hid_read_block function once after system resumes.
Because

Signed-off-by: Marge Yang<marge.yang@synaptics.corp-partner.google.com>
---
 drivers/hid/hid-rmi.c | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

Comments

Dan Carpenter Aug. 15, 2022, 8:16 a.m. UTC | #1 
Hi margeyang,

https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/margeyang/Input-HID-rmi-ignore-to-rmi_hid_read_block-after-system-resumes/20220801-145006
base:   https://git.kernel.org/pub/scm/linux/kernel/git/hid/hid.git for-next
config: x86_64-randconfig-m001-20220801 (https://download.01.org/0day-ci/archive/20220814/202208142212.QB3fvm5l-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-3) 11.3.0

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>

New smatch warnings:
drivers/hid/hid-rmi.c:263 rmi_hid_read_block() error: uninitialized symbol 'ret'.

vim +/ret +263 drivers/hid/hid-rmi.c

0b2c7a897378f1 Andrew Duggan      2017-01-05  188  static int rmi_hid_read_block(struct rmi_transport_dev *xport, u16 addr,
0b2c7a897378f1 Andrew Duggan      2017-01-05  189  		void *buf, size_t len)
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  190  {
0b2c7a897378f1 Andrew Duggan      2017-01-05  191  	struct rmi_data *data = container_of(xport, struct rmi_data, xport);
0b2c7a897378f1 Andrew Duggan      2017-01-05  192  	struct hid_device *hdev = data->hdev;
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  193  	int ret;
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  194  	int bytes_read;
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  195  	int bytes_needed;
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  196  	int retries;
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  197  	int read_input_count;
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  198  
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  199  	mutex_lock(&data->page_mutex);
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  200  
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  201  	if (RMI_PAGE(addr) != data->page) {
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  202  		ret = rmi_set_page(hdev, RMI_PAGE(addr));
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  203  		if (ret < 0)
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  204  			goto exit;
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  205  	}
30a3df7ece6145 Marge Yang         2022-08-01  206  	if (ignoreonce == 1) {
30a3df7ece6145 Marge Yang         2022-08-01  207  		dev_err(&hdev->dev,
30a3df7ece6145 Marge Yang         2022-08-01  208  			"ignoreonce (%d)\n",
30a3df7ece6145 Marge Yang         2022-08-01  209  			ignoreonce);
30a3df7ece6145 Marge Yang         2022-08-01  210  		ignoreonce = 0;

"ret" not initialized here.

30a3df7ece6145 Marge Yang         2022-08-01  211  		goto exit;
30a3df7ece6145 Marge Yang         2022-08-01  212  	}
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  213  	for (retries = 5; retries > 0; retries--) {
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  214  		data->writeReport[0] = RMI_READ_ADDR_REPORT_ID;
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  215  		data->writeReport[1] = 0; /* old 1 byte read count */
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  216  		data->writeReport[2] = addr & 0xFF;
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  217  		data->writeReport[3] = (addr >> 8) & 0xFF;
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  218  		data->writeReport[4] = len  & 0xFF;
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  219  		data->writeReport[5] = (len >> 8) & 0xFF;
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  220  
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  221  		set_bit(RMI_READ_REQUEST_PENDING, &data->flags);
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  222  
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  223  		ret = rmi_write_report(hdev, data->writeReport,
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  224  						data->output_report_size);
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  225  		if (ret != data->output_report_size) {
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  226  			dev_err(&hdev->dev,
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  227  				"failed to write request output report (%d)\n",
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  228  				ret);
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  229  			goto exit;
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  230  		}
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  231  
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  232  		bytes_read = 0;
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  233  		bytes_needed = len;
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  234  		while (bytes_read < len) {
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  235  			if (!wait_event_timeout(data->wait,
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  236  				test_bit(RMI_READ_DATA_PENDING, &data->flags),
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  237  					msecs_to_jiffies(1000))) {
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  238  				hid_warn(hdev, "%s: timeout elapsed\n",
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  239  					 __func__);
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  240  				ret = -EAGAIN;
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  241  				break;
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  242  			}
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  243  
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  244  			read_input_count = data->readReport[1];
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  245  			memcpy(buf + bytes_read, &data->readReport[2],
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  246  				read_input_count < bytes_needed ?
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  247  					read_input_count : bytes_needed);
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  248  
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  249  			bytes_read += read_input_count;
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  250  			bytes_needed -= read_input_count;
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  251  			clear_bit(RMI_READ_DATA_PENDING, &data->flags);
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  252  		}
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  253  
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  254  		if (ret >= 0) {
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  255  			ret = 0;
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  256  			break;
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  257  		}
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  258  	}
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  259  
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  260  exit:
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  261  	clear_bit(RMI_READ_REQUEST_PENDING, &data->flags);
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  262  	mutex_unlock(&data->page_mutex);
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07 @263  	return ret;
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  264  }
Marge Yang Aug. 15, 2022, 10:24 a.m. UTC | #2 
Hi Dan,
	Thanks for your information.
	I will fix it on V4 patch.

Thanks
Marge Yang

-----Original Message-----
From: Dan Carpenter <dan.carpenter@oracle.com> 
Sent: Monday, August 15, 2022 4:16 PM
To: kbuild@lists.01.org; margeyang <marge.yang@synaptics.corp-partner.google.com>; dmitry.torokhov@gmail.com; linux-input@vger.kernel.org; linux-kernel@vger.kernel.org
Cc: lkp@intel.com; kbuild-all@lists.01.org; Marge Yang <Marge.Yang@tw.synaptics.com>; derek.chegn@tw.synaptcs.com; Vincent Huang <Vincent.huang@tw.synaptics.com>; Marge Yang <marge.yang@synaptics.corp-partner.google.com>
Subject: Re: [PATCH] Input: HID-rmi - ignore to rmi_hid_read_block after system resumes.

CAUTION: Email originated externally, do not click links or open attachments unless you recognize the sender and know the content is safe.


Hi margeyang,

https://urldefense.proofpoint.com/v2/url?u=https-3A__git-2Dscm.com_docs_git-2Dformat-2Dpatch-23-5Fbase-5Ftree-5Finformation&d=DwIBAg&c=7dfBJ8cXbWjhc0BhImu8wVIoUFmBzj1s88r8EGyM0UY&r=ddk_91asmhyAjxFmXHNIQZ2mVcW0D_eq4tb4409nZ94&m=nlgT-3IvgCsBjboEk2pLpv9NTbEPA_DBxNCtUS1pfsH-sX4rFp4vWip9TKD5bZgD&s=ZPw8UPZC7QjdIlIk0NorBFkiiDexM8yXIDSCUXyvUoI&e=  ]

url:    https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_intel-2Dlab-2Dlkp_linux_commits_margeyang_Input-2DHID-2Drmi-2Dignore-2Dto-2Drmi-5Fhid-5Fread-5Fblock-2Dafter-2Dsystem-2Dresumes_20220801-2D145006&d=DwIBAg&c=7dfBJ8cXbWjhc0BhImu8wVIoUFmBzj1s88r8EGyM0UY&r=ddk_91asmhyAjxFmXHNIQZ2mVcW0D_eq4tb4409nZ94&m=nlgT-3IvgCsBjboEk2pLpv9NTbEPA_DBxNCtUS1pfsH-sX4rFp4vWip9TKD5bZgD&s=qM9oqLWIocmeg-um8b7KrQ7lKvYhttRHtsckOGgVlpg&e=
base:   https://urldefense.proofpoint.com/v2/url?u=https-3A__git.kernel.org_pub_scm_linux_kernel_git_hid_hid.git&d=DwIBAg&c=7dfBJ8cXbWjhc0BhImu8wVIoUFmBzj1s88r8EGyM0UY&r=ddk_91asmhyAjxFmXHNIQZ2mVcW0D_eq4tb4409nZ94&m=nlgT-3IvgCsBjboEk2pLpv9NTbEPA_DBxNCtUS1pfsH-sX4rFp4vWip9TKD5bZgD&s=m7w3BRuQqsSi92tD7Gu4x5PdJHLoevCdc3u2UZbKD4s&e=   for-next
config: x86_64-randconfig-m001-20220801 (https://urldefense.proofpoint.com/v2/url?u=https-3A__download.01.org_0day-2Dci_archive_20220814_202208142212.QB3fvm5l-2Dlkp-40intel.com_config&d=DwIBAg&c=7dfBJ8cXbWjhc0BhImu8wVIoUFmBzj1s88r8EGyM0UY&r=ddk_91asmhyAjxFmXHNIQZ2mVcW0D_eq4tb4409nZ94&m=nlgT-3IvgCsBjboEk2pLpv9NTbEPA_DBxNCtUS1pfsH-sX4rFp4vWip9TKD5bZgD&s=7qqbxHlAk9YvxOzNvBC00oePmwYwpvxsoq9bF7lgg3w&e=  )
compiler: gcc-11 (Debian 11.3.0-3) 11.3.0

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>

New smatch warnings:
drivers/hid/hid-rmi.c:263 rmi_hid_read_block() error: uninitialized symbol 'ret'.

vim +/ret +263 drivers/hid/hid-rmi.c

0b2c7a897378f1 Andrew Duggan      2017-01-05  188  static int rmi_hid_read_block(struct rmi_transport_dev *xport, u16 addr,
0b2c7a897378f1 Andrew Duggan      2017-01-05  189               void *buf, size_t len)
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  190  {
0b2c7a897378f1 Andrew Duggan      2017-01-05  191       struct rmi_data *data = container_of(xport, struct rmi_data, xport);
0b2c7a897378f1 Andrew Duggan      2017-01-05  192       struct hid_device *hdev = data->hdev;
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  193       int ret;
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  194       int bytes_read;
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  195       int bytes_needed;
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  196       int retries;
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  197       int read_input_count;
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  198
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  199       mutex_lock(&data->page_mutex);
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  200
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  201       if (RMI_PAGE(addr) != data->page) {
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  202               ret = rmi_set_page(hdev, RMI_PAGE(addr));
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  203               if (ret < 0)
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  204                       goto exit;
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  205       }
30a3df7ece6145 Marge Yang         2022-08-01  206       if (ignoreonce == 1) {
30a3df7ece6145 Marge Yang         2022-08-01  207               dev_err(&hdev->dev,
30a3df7ece6145 Marge Yang         2022-08-01  208                       "ignoreonce (%d)\n",
30a3df7ece6145 Marge Yang         2022-08-01  209                       ignoreonce);
30a3df7ece6145 Marge Yang         2022-08-01  210               ignoreonce = 0;

"ret" not initialized here.

30a3df7ece6145 Marge Yang         2022-08-01  211               goto exit;
30a3df7ece6145 Marge Yang         2022-08-01  212       }
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  213       for (retries = 5; retries > 0; retries--) {
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  214               data->writeReport[0] = RMI_READ_ADDR_REPORT_ID;
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  215               data->writeReport[1] = 0; /* old 1 byte read count */
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  216               data->writeReport[2] = addr & 0xFF;
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  217               data->writeReport[3] = (addr >> 8) & 0xFF;
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  218               data->writeReport[4] = len  & 0xFF;
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  219               data->writeReport[5] = (len >> 8) & 0xFF;
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  220
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  221               set_bit(RMI_READ_REQUEST_PENDING, &data->flags);
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  222
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  223               ret = rmi_write_report(hdev, data->writeReport,
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  224                                               data->output_report_size);
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  225               if (ret != data->output_report_size) {
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  226                       dev_err(&hdev->dev,
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  227                               "failed to write request output report (%d)\n",
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  228                               ret);
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  229                       goto exit;
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  230               }
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  231
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  232               bytes_read = 0;
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  233               bytes_needed = len;
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  234               while (bytes_read < len) {
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  235                       if (!wait_event_timeout(data->wait,
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  236                               test_bit(RMI_READ_DATA_PENDING, &data->flags),
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  237                                       msecs_to_jiffies(1000))) {
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  238                               hid_warn(hdev, "%s: timeout elapsed\n",
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  239                                        __func__);
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  240                               ret = -EAGAIN;
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  241                               break;
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  242                       }
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  243
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  244                       read_input_count = data->readReport[1];
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  245                       memcpy(buf + bytes_read, &data->readReport[2],
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  246                               read_input_count < bytes_needed ?
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  247                                       read_input_count : bytes_needed);
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  248
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  249                       bytes_read += read_input_count;
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  250                       bytes_needed -= read_input_count;
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  251                       clear_bit(RMI_READ_DATA_PENDING, &data->flags);
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  252               }
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  253
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  254               if (ret >= 0) {
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  255                       ret = 0;
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  256                       break;
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  257               }
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  258       }
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  259
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  260  exit:
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  261       clear_bit(RMI_READ_REQUEST_PENDING, &data->flags);
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  262       mutex_unlock(&data->page_mutex);
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07 @263       return ret;
9fb6bf02e3ad04 Benjamin Tissoires 2014-04-07  264  }

--
0-DAY CI Kernel Test Service
https://urldefense.proofpoint.com/v2/url?u=https-3A__01.org_lkp&d=DwIBAg&c=7dfBJ8cXbWjhc0BhImu8wVIoUFmBzj1s88r8EGyM0UY&r=ddk_91asmhyAjxFmXHNIQZ2mVcW0D_eq4tb4409nZ94&m=nlgT-3IvgCsBjboEk2pLpv9NTbEPA_DBxNCtUS1pfsH-sX4rFp4vWip9TKD5bZgD&s=iqPMCIB5YYZdhSl4lFrcKmwdNU-RU2DL046Inhx7mPM&e=
diff mbox series

Patch

diff --git a/drivers/hid/hid-rmi.c b/drivers/hid/hid-rmi.c
index 311eee599ce9..1b038f3db0f1 100644
--- a/drivers/hid/hid-rmi.c
+++ b/drivers/hid/hid-rmi.c
@@ -101,7 +101,7 @@  struct rmi_data {
 };
 
 #define RMI_PAGE(addr) (((addr) >> 8) & 0xff)
-
+int ignoreonce;
 static int rmi_write_report(struct hid_device *hdev, u8 *report, int len);
 
 /**
@@ -203,7 +203,13 @@  static int rmi_hid_read_block(struct rmi_transport_dev *xport, u16 addr,
 		if (ret < 0)
 			goto exit;
 	}
-
+	if (ignoreonce == 1) {
+		dev_err(&hdev->dev,
+			"ignoreonce (%d)\n",
+			ignoreonce);
+		ignoreonce = 0;
+		goto exit;
+	}
 	for (retries = 5; retries > 0; retries--) {
 		data->writeReport[0] = RMI_READ_ADDR_REPORT_ID;
 		data->writeReport[1] = 0; /* old 1 byte read count */
@@ -468,7 +474,10 @@  static int rmi_post_resume(struct hid_device *hdev)
 	ret = hid_hw_open(hdev);
 	if (ret)
 		return ret;
-
+	// Avoid to read rmi_hid_read_block once after system resumes.
+	// The interrupt will be pulled down
+	// after RMI Read command(Report ID:0x0A).
+	ignoreonce = 1;
 	ret = rmi_reset_attn_mode(hdev);
 	if (ret)
 		goto out;