On 16-03-23, 22:34, Mukunda,Vijendar wrote:
> On 15/03/23 15:36, Vinod Koul wrote:
> > On 07-03-23, 19:01, Vijendar Mukunda wrote:
> >> +static void amd_sdw_update_slave_status_work(struct work_struct *work)
> >> +{
> >> + struct amd_sdw_manager *amd_manager =
> >> + container_of(work, struct amd_sdw_manager, amd_sdw_work);
> >> + int retry_count = 0;
> >> +
> >> + if (amd_manager->status[0] == SDW_SLAVE_ATTACHED) {
> >> + acp_reg_writel(0, amd_manager->mmio + ACP_SW_STATE_CHANGE_STATUS_MASK_0TO7);
> >> + acp_reg_writel(0, amd_manager->mmio + ACP_SW_STATE_CHANGE_STATUS_MASK_8TO11);
> >> + }
> >> +
> >> +update_status:
> >> + sdw_handle_slave_status(&amd_manager->bus, amd_manager->status);
> >> + /*
> >> + * During the peripheral enumeration sequence, the SoundWire manager interrupts
> >> + * are masked. Once the device number programming is done for all peripherals,
> >> + * interrupts will be unmasked. Read the peripheral device status from ping command
> >> + * and process the response. This sequence will ensure all peripheral devices enumerated
> >> + * and initialized properly.
> >> + */
> >> + if (amd_manager->status[0] == SDW_SLAVE_ATTACHED) {
> >> + if (retry_count++ < SDW_MAX_DEVICES) {
> >> + acp_reg_writel(AMD_SDW_IRQ_MASK_0TO7, amd_manager->mmio +
> >> + ACP_SW_STATE_CHANGE_STATUS_MASK_0TO7);
> >> + acp_reg_writel(AMD_SDW_IRQ_MASK_8TO11,
> >> + amd_manager->mmio + ACP_SW_STATE_CHANGE_STATUS_MASK_8TO11);
> >> + amd_sdw_read_and_process_ping_status(amd_manager);
> >> + goto update_status;
> > goto are mostly used for error handling, i dont thing case here deserves
> > a goto, can you please change this...
> I agree. goto statements will be used mostly for error handling.
> But this is a different scenario. We have used goto statement to call sdw_handle_slave_status()
> from if statement to make sure all peripheral devices are enumerated and initialized properly.
> Please let us know if you are expecting code to be modified as mentioned below.
>
> sdw_handle_slave_status(&amd_manager->bus, amd_manager->status);
>
> if (amd_manager->status[0] == SDW_SLAVE_ATTACHED) {
> acp_reg_writel(AMD_SDW_IRQ_MASK_0TO7, amd_manager->mmio +
> ACP_SW_STATE_CHANGE_STATUS_MASK_0TO7);
> acp_reg_writel(AMD_SDW_IRQ_MASK_8TO11,
> amd_manager->mmio + ACP_SW_STATE_CHANGE_STATUS_MASK_8TO11);
> amd_sdw_read_and_process_ping_status(amd_manager);
> sdw_handle_slave_status(&amd_manager->bus, amd_manager->status);
> }
>
> We have to check any race conditions occurs or not if we implement code as mentioned
> above.
what race are you talking about
> IMHO, it is still good to go with goto statement implementation.
Since you keep checking, essentially this seems to be a loop?
--
~Vinod
