re: Input: synaptics-rmi4 - add support for Synaptics RMI4 devices

[Dan Carpenter <dan.carpenter@oracle.com>]

Hello Andrew Duggan,

The patch 2b6a321da9a2: "Input: synaptics-rmi4 - add support for
Synaptics RMI4 devices" from Mar 10, 2016, leads to the following
static checker warning:

	drivers/input/rmi4/rmi_driver.c:129 process_one_interrupt()
	warn: this array is probably non-NULL. 'fn->irq_mask'

drivers/input/rmi4/rmi_driver.c
   120  static void process_one_interrupt(struct rmi_driver_data *data,
   121                                    struct rmi_function *fn)
   122  {
   123          struct rmi_function_handler *fh;
   124  
   125          if (!fn || !fn->dev.driver)
   126                  return;
   127  
   128          fh = to_rmi_function_handler(fn->dev.driver);
   129          if (fn->irq_mask && fh->attention) {
                    ^^^^^^^^^^^^
Always true.

   130                  bitmap_and(data->fn_irq_bits, data->irq_status, fn->irq_mask,
   131                                  data->irq_count);
   132                  if (!bitmap_empty(data->fn_irq_bits, data->irq_count))
   133                          fh->attention(fn, data->fn_irq_bits);
   134          }
   135  }

See also:
drivers/input/rmi4/rmi_driver.c:175 rmi_process_interrupt_requests() warn: this array is probably non-NULL. 'entry->irq_mask'


regards,
dan carpenter