On Thu, Apr 30, 2020 at 01:11:06PM +0200, Tomek The Messenger wrote: > Hi > If I don't have disabled irqs I can use API i2c_smbus_write_byte in order > to perform i2c transaction. > But how to make i2c transaction if I have disabled irq? Is any built-in > function which lets such operation, where there is some polling implemented? > The background is that I do i2c transaction in restart handler (some i2c > transaction to hot swap controller) in order to reset board. And linux > before entering restart handler list disable interrupts. There is a > function to enable back interrupts but in company in which I am working > engineers reviewed it and said "it is not allowed, restart must be > performed when interrupts are disabled". Ask the engineers how you are supposed to use an interrupt driven device with interrupts disabled. good luck! greg k-h _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
