On Wed, Jan 27, 2021 at 02:19:27PM +0800, carlis wrote: > hi,i will fix it like below: > par->gpio.te = devm_gpiod_get_index_optional(dev, "te", 0, > GPIOD_IN); if (IS_ERR(par->gpio.te)) { > rc = PTR_ERR(par->gpio.te); > pr_err("Failed to request te gpio: %d\n", rc); > par->gpio.te = NULL; > } I wish you would just copy and paste the code that I sent you instead, but this also fixes the crash... regards, dan carpenter _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel