Hi Sanjay,

I love your patch! Perhaps something to improve:

[auto build test WARNING on vkoul-dmaengine/next]
[also build test WARNING on linus/master sparc-next/master v5.14-rc3 next-20210730]
[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]

url:    https://github.com/0day-ci/linux/commits/Sanjay-R-Mehta/Add-support-for-AMD-PTDMA-controller-driver/20210802-183459
base:   https://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine.git next
config: x86_64-allyesconfig (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://github.com/0day-ci/linux/commit/7d906443ab57733e8fe130a3dfe116d8d254dd19
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Sanjay-R-Mehta/Add-support-for-AMD-PTDMA-controller-driver/20210802-183459
        git checkout 7d906443ab57733e8fe130a3dfe116d8d254dd19
        # save the attached .config to linux build tree
        make W=1 ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

   drivers/dma/ptdma/ptdma-dev.c: In function 'pt_core_irq_handler':
>> drivers/dma/ptdma/ptdma-dev.c:151:7: warning: variable 'err' set but not used [-Wunused-but-set-variable]
     151 |  bool err = true;
         |       ^~~
   drivers/dma/ptdma/ptdma-dev.c: In function 'pt_core_init':
   drivers/dma/ptdma/ptdma-dev.c:252:8: error: implicit declaration of function 'pt_dmaengine_register' [-Werror=implicit-function-declaration]
     252 |  ret = pt_dmaengine_register(pt);
         |        ^~~~~~~~~~~~~~~~~~~~~
   drivers/dma/ptdma/ptdma-dev.c: In function 'pt_core_destroy':
   drivers/dma/ptdma/ptdma-dev.c:278:2: error: implicit declaration of function 'pt_dmaengine_unregister' [-Werror=implicit-function-declaration]
     278 |  pt_dmaengine_unregister(pt);
         |  ^~~~~~~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors


vim +/err +151 drivers/dma/ptdma/ptdma-dev.c

   145	
   146	static irqreturn_t pt_core_irq_handler(int irq, void *data)
   147	{
   148		struct pt_device *pt = data;
   149		struct pt_cmd_queue *cmd_q = &pt->cmd_q;
   150		u32 status;
 > 151		bool err = true;
   152	
   153		pt_core_disable_queue_interrupts(pt);
   154		status = ioread32(cmd_q->reg_control + 0x0010);
   155		if (status) {
   156			cmd_q->int_status = status;
   157			cmd_q->q_status = ioread32(cmd_q->reg_control + 0x0100);
   158			cmd_q->q_int_status = ioread32(cmd_q->reg_control + 0x0104);
   159	
   160			/* On error, only save the first error value */
   161			if ((status & INT_ERROR) && !cmd_q->cmd_error) {
   162				cmd_q->cmd_error = CMD_Q_ERROR(cmd_q->q_status);
   163				err = false;
   164			}
   165	
   166			/* Acknowledge the interrupt */
   167			iowrite32(status, cmd_q->reg_control + 0x0010);
   168			pt_core_enable_queue_interrupts(pt);
   169			pt_do_cmd_complete((ulong)&pt->tdata);
   170		}
   171		return IRQ_HANDLED;
   172	}
   173	

---
0-DAY CI Kernel Test Service, Intel Corporation
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